CN101457553A - Spring stiffness adjustable tuning quality damper - Google Patents
Spring stiffness adjustable tuning quality damper Download PDFInfo
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- CN101457553A CN101457553A CNA2008100826548A CN200810082654A CN101457553A CN 101457553 A CN101457553 A CN 101457553A CN A2008100826548 A CNA2008100826548 A CN A2008100826548A CN 200810082654 A CN200810082654 A CN 200810082654A CN 101457553 A CN101457553 A CN 101457553A
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Abstract
The invention specifically relates to a mass tuned vibration reducer used for controlling the vibration of an aerobridge in the airport, a large-span pedestrian bridge, a port trestle, high-rise buildings and the related structures. The mass tuned vibration reducer comprises a mass block, a spring, a damper and a base; wherein, the spring can be a spiral spring, a disc spring or a plate spring, and the end part of the spring is provided with a rigidity regulating device. The mass tuned vibration reducer can successfully realize the regulation on the natural frequency of a TMD system under the condition of needing not to assemble and disassemble the TMD since the end part of the spring is provided with the rigidity regulating device, so as to simplify the difficulty of regulation work, avoid the waste of manpower and materials and greatly reduce the construction cost. Meanwhile, the natural frequency and the damping of the system can be regulated in an optimized way under the condition of needing not to assemble and disassemble the TMD, thereby better exerting the vibration absorption performance of the mass tuned vibration reducer, ensuring safety and stableness of the pedestrians and vehicles on the large-span bridge and the thin and high building, contributing to prolonging the service lives of the thin and high building and the bridge, and having remarkable economic and social benefits.
Description
Technical field
The invention belongs to the civil engineering structure antivibration area, be specifically related to a kind of tuning mass bumper that is used to control airport connecting bridge, large span pedestrian overcrossing, harbour trestle, highrise building and dependency structure vibration.
Background technology
Development along with urban construction, various high levels, super highrise building and thin and tall structure, long span building thing are increasing, simultaneously, urban traffic network is more and more flourishing, bridge constructions such as the airport connecting bridge of various large spans, pedestrian overcrossing, harbour trestle have obtained widely using, for people's trip brings great convenience.But, though this type of thin and tall building and bridge strength and stiffness ratio are easier to meet design requirement, the frequency of its vertical motion general just all lower (for example the vertical frequency of large span pedestrian overcrossing has only about 2 hertz usually), under high wind excitation or dynamic load effects such as pedestrian, vehicle, resonate easily, bring uncomfortable feeling to the pedestrian, cause the works self structure to damage, even serious threat is to the safety of people and vehicle.How to prevent that this class large span, low frequency configuration thing from destructive resonance taking place become the realistic problem that addresses of having in the engineering construction.Facts have proved, tuning mass bumper (also have to claim tuned mass damper in the document, or claim mass tuning damper, also be called for short shock absorber or TMD herein) is a kind of effective vibration control apparatus, its intrinsic frequency is adjusted to natural frequency near structure, install structurally then.When structure is subjected to exciting force interference generation vibration, cause the resonance of tuning mass bumper, utilize the vibrating inertia force of tuning quality to react on structure itself, thereby offset exciting force, reach the purpose that reduces structural response.Want to bring into play to greatest extent the damping effect of tuning mass bumper, the natural frequency with main structure is consistent as far as possible to require its intrinsic frequency, otherwise the effectiveness in vibration suppression of TMD will decline to a great extent.Because there are deviation in bridge actual resonance frequency and design, and the part bridge later stage is provided with extraneous factor influences such as jumbo advertisement, the concrete parameter of bridge construction easily changes, and this just requires the intrinsic frequency of tuning mass bumper to adjust accordingly at any time.; existing tuning mass bumper all realizes adjusting intrinsic frequency by changing spring or changing tuning quality; as application number is the oriented vertical adjustable tuning mass bumper that 200410087664.2 Chinese patent is announced; but; rely on the method for changing spring to solve the significant wastage that this type of problem certainly will cause goods and materials and manpower; and the rigidity of spring also is difficult to process accurately especially, and the method that changes tuning quality is equally too coarse, is difficult to realize accurate adjustment.Particularly the erecting bed condition of work is often very simple and crude, and this type of method of adjustment that relates to the TMD dismounting implements very inconvenient.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide a kind of spring rate accurately to adjust, need not TMD is carried out the spring stiffness adjustable tuning quality damper of dismounting during adjustment.
The present invention is achieved in that and comprises mass, spring, damper and base, and wherein, spring can be helical spring, dish spring or leaf spring, and spring end is provided with the rigidity adjusting device.
Described rigidity adjusting device comprises solidifies tube and curing materials, and curing materials and spring are arranged on and solidify in the tube, and spring section is embedded in the middle of the curing materials.Utilize curing materials to be solidified into one with the spring section of its submergence, thus make spring be fixed part lose wholly or in part former flexible, thereby realize to change the purpose of spring rate.Described curing materials comprises the metal material or the macromolecular material of low melting point, normal temperature curable, as metallic lead etc., or normal temperature two components and many components composite material that can solidify after mixing, as epoxy resin; The rigidity adjusting device can also be a constraint block, and constraint block inserts from an end and is arranged at spring inner, or is provided with along the spring soffit.Utilize the effective length of the spring of constraint block restriction actual participation work, thereby realize regulating spring rigidity, and then reach the purpose of adjusting intrinsic frequency.Constraint block mass adjacent thereto or base link to each other, and also can directly link to each other with the member for the treatment of vibration isolation.For helical spring, can constraint block surface be provided with spring spring silk between the corresponding helical raised in space, behind the constraint block screw-in spring, the projection on constraint block surface is stuck between the spring spring silk, makes this partial spring loss of elasticity.For improving the abrasion resistance properties of constraint block, wearing layer or peripheral hardware wear-resistant sleeve can also be set on the constraint block surface.
For the ease of the Adjustment System damping ratio, when adopting common hole throttle type hydraulic damper, can between the chamber of the piston two ends of damper, UNICOM's pipeline be set, also be provided for controlling the control valve of hydraulic fluid flow rate on UNICOM's pipeline.Press the flow of oil just can realize changing the damper damping characteristic smoothly by valve control chamber interstitial fluid like this, and then reach the purpose of Adjustment System damping ratio; In addition, damper can also be the adhesion-type damper that is made of damped cylinder, viscous damping liquid and piston, and wherein, piston and adhesion damping fluid are arranged in the damped cylinder, and piston to small part immerses in the adhesion damping fluid.Operating principle according to the adhesion-type damper, the damping force that produces when piston and damped cylinder relative motion mainly is made up of the adhesion strength of damping fluid, damping fluid is made of full-bodied damping liquid, as silicone oil or methyl-silicone oil, the main acting surface of damping force is positioned at the side of piston, damping force is directly proportional with effective adhesion work area that piston moves up and down in the process in damped cylinder and the adhesion damping fluid comes in contact, therefore, by adjusting the damping agent liquid level, just can change the real work area of piston, thereby reach the purpose of the damping ratio that changes damper.Because what tuning mass bumper of the present invention adopted is open adhesion damper, damper need not pressure-resistant seal, therefore dismounting is very convenient, can at any time damper be taken apart, change the damping ratio of damper by interpolation or minimizing adhesion damping fluid, and then optimize the damping ratio of whole system.Accurately and easily adjust damping ratio for the ease of this type of damper, be provided with the damping adjusting device at the adhesion-type damper.The damping adjusting device can be the double-screw bolt of heightening that is fixedly installed on piston one end, heightens double-screw bolt and links to each other with its top mass or base; Also can be the double-screw bolt of heightening that is fixedly installed on damped cylinder one end, heighten double-screw bolt and link to each other with the base or the mass of its below; Can also be the can hole of resistance cylinders top or top setting and the outage of resistance cylinders bottom or below setting, outage be provided with plug.On the can hole plug can be set, also can take the routine sealing of other dustproof and waterproofs to handle.The piston of damper is a tubulose, or/and bar-shaped, or/and tabular.Resistance cylinders inside is provided with at least one sub-cylinder, communicates with each other between the sub-cylinder, and piston cooperates with resistance cylinders and sub-cylinder body simultaneously, or the sub-piston of quantity and sub-cylinder quantity Matching is set.When piston or sub-piston are tubular structure, on the piston or/and on the sub-piston steam vent is set.
When adopting the adhesion-type damper, can guarantee shock absorber realization action smoothly, it can provide three-dimensional damping, therefore can effectively suppress side-sway, need not for the mass of vibration vibration special guiding device to be set, especially when the gap of piston and damped cylinder during much smaller than the contact length in the piston axis direction of piston and damping fluid, system is more stable, so structure is simpler, and it is more reliable to work, the life-span of tuning mass bumper and damper is long, and does not need to be serviced maintenance substantially.Again owing to damped cylinder in the adhesion-type damper is open the cooperation with piston space, whole device does not need quality of fit requirement height, sealing that requirement of withstand voltage is high, only need consider basic water proof and dust proof during use, therefore use the piston type damper and the hole throttle type damper of hydraulic oil with respect to tradition, its cost of production has obtained significantly reducing, and effectiveness in vibration suppression is more perfect, therefore has higher cost performance.
For guaranteeing that side-sway does not take place in the mass of vibration course of work, can between mass and base, guiding device be set.Guiding device can be independent be provided be connected in lead between mass and the base, also can be guide pad or the guide ring that is integrated in damper inside.
The present invention is by being provided with the rigidity adjusting device at spring end, can simplify the adjustment work difficulty carrying out having realized adjustment under the situation of dismounting to TMD to the TMD system frequency, avoid the waste of manpower and goods and materials, greatly reduced construction cost.Simultaneously,, perhaps adopt adhesion-type damper and damping adjusting device, realized regulating at any time the purpose of tuning mass bumper intrinsic frequency and damping ratio by on hole throttle type hydraulic damper, UNICOM's pipeline and control valve being set.Just can accurately carry out the optimization of system frequency and damping under the situation that need not dismounting TMD regulates, can better bring into play the damping property of tuning mass bumper, guarantee pedestrian and vehicle operating on thin and tall building and the Longspan Bridge steadily and safety, help further prolonging the application life of thin and tall building and long span building or bridge, its economic benefit and social benefit are very remarkable.
Description of drawings
Fig. 1 is one of structural representation of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is two of a structural representation of the present invention.
Fig. 4 is the plan structure schematic diagram of Fig. 3.
Fig. 5 is three of a structural representation of the present invention.
Fig. 6 is four of a structural representation of the present invention.
Fig. 7 is five of a structural representation of the present invention.
Fig. 8 is six of a structural representation of the present invention.
Fig. 9 is seven of a structural representation of the present invention.
Figure 10 is eight of a structural representation of the present invention.
Figure 11 is the D-D sectional view of Figure 10.
The specific embodiment
Embodiment one
Spring stiffness adjustable tuning quality damper of the present invention as shown in Figure 1 and Figure 2, comprise tuning quality piece 1, four springs 2, damper 4 and bases 6, wherein, spring 2 adopts helical steel springs, for the ease of the spring location, welding is provided with spring positioning seat 7 on base 6 and spring 2 adjacent masses.For the ease of accurately regulating the intrinsic frequency of spring stiffness adjustable tuning quality damper of the present invention, also be provided with the rigidity adjusting device in spring 2 lower ends, described rigidity adjusting device comprises solidifies tube 8 and solidifies the curing materials 9 that is provided with in the tube, and curing materials is a metallic lead.Utilize the metallic lead fusing point low, the characteristics of normal temperature curable, lead is melt into to inject behind the lead water solidifies tube, make the spring section of itself and submergence be solidified into one, the elasticity of the spring section that is cured is like this lost substantially, the number of active coils that is equivalent to spring reduces, and so just can artificially adjust the rigidity of spring, and then the intrinsic frequency of control spring stiffness adjustable tuning quality damper of the present invention.For the auxiliary intrinsic frequency of adjusting vibration insulating system of the present invention, tuning quality piece 1 adopts the polylith steel plate combination of different-thickness, and be fixed together with bolt 3 and constitute the tuning quality of whole vibration insulating system, before accurately adjusting, can utilize to change tuning quality and adjust in advance.In order to guarantee that mass of vibration along side-sway does not take place in the vertical vibration process, also is provided with two leads 5.
During use,, select suitable spring 2, tuning quality piece 1 and damper 4, they are assembled on the base 6, constitute spring stiffness adjustable tuning quality damper of the present invention according to the design parameters of bridge.By the quantity that changes tuning quality piece 1 intrinsic frequency of tuning mass bumper is carried out coarse regulation, make it approaching with the bridge construction resonance frequency as far as possible, then the tuning mass bumper that assembles is placed on the case beam base plate 10 of bridge construction, again by adjusting the use amount of solidifying curing materials lead 9 in the tube 8, accurately adjust spring 2 rigidity, further optimization system intrinsic frequency, make the damping property of vibration insulating system reach best, at last base plate is weldingly fixed on the case beam base plate 10, certainly, the two also can to utilize securing member to carry out fixedly connected.According to the actual conditions of engineering, also tuning mass bumper can be weldingly fixed on earlier on the case beam base plate 10 herein and adjust again, also can realize identical effect.After spring stiffness adjustable tuning quality damper of the present invention has been installed, when bridge is subjected to exciting force interference generation vibration, can cause the resonance of tuning mass bumper of the present invention, the vibrating inertia force of tuning mass bumper reacts on bridge construction itself, can offset exciting force, reach the purpose that reduces the bridge construction reaction, simultaneously because the existence of damping in the tuning mass bumper, the vibration of bridge is decayed rapidly, the structural fatigue of having avoided the bridge frequent vibration to cause destroys, and has effectively prolonged the application life of bridge.
Because helical steel springs can be in level and vertical direction generation effect simultaneously in the shock absorber of the present invention, so can decay the simultaneously vibration of bridge construction horizontal direction and vertical direction of spring stiffness adjustable tuning quality damper of the present invention.Only the horizontal direction of shock absorber and vertical direction intrinsic frequency need be adjusted to the horizontal direction of bridge construction in the use respectively and the vertical direction intrinsic frequency is corresponding gets final product.And the rigidity adjusting device described in the present invention just can realize changing simultaneously the horizontal rigidity and the vertical stiffness of helical steel springs, so in the technical scheme routine such as this used, described spring rate adjustment has comprised the horizontal rigidity of spring and the adjustment of vertical stiffness simultaneously, its can realize regulating simultaneously spring stiffness adjustable tuning quality damper of the present invention in the horizontal direction with the intrinsic frequency of vertical direction.
This example is that representative is illustrated with four springs and a damper only, according to spirit of the present invention, also can varying number be set as required in the practical application even organize spring and a plurality of damper of different model more, it is to be noted that spring and damper should be uniform as far as possible, the situation of eccentric unstability occurs to avoid whole vibration insulating system.
Because the dish spring also can well be realized vertical one dimension damping effect, therefore,,, except that using helical steel springs, use the dish spring also can realize same vertical direction effectiveness in vibration suppression among the TMD in some vibration isolation places based on the principle of the invention.Described curing materials can also be the metal material or the macromolecular material of other low melting point, normal temperature curable except that metallic lead, or two components and many components composite material that can solidify after the normal temperature mixing, as epoxy resin, also can realize same effect.
Embodiment two
As shown in Figure 3, Figure 4, with embodiment one different being, the rigidity adjusting device adopts from the top and inserts the constraint blocks 11 that spring 2 inside are provided with, and constraint block 11 is adjacent the support 12 that welding is provided with on the mass and links to each other by helicitic texture, and locks with nut 13.Because constraint block 11 adopts interference fit with the inner ring of spring 2, the spring section elasticity that contacts with constraint block 11 must be subjected to very big restriction, like this, insert the degree of depth artificial rigidity of control spring just in the springs by adjusting constraint block 11, and then reach the purpose of the intrinsic frequency of controlling spring stiffness adjustable tuning quality damper of the present invention.In addition,, between the chamber of the piston two ends of damper, UNICOM's pipeline 14 is set, also is provided for controlling the control valve 15 of hydraulic fluid flow rate on UNICOM's pipeline 14 for the ease of the Adjustment System damping ratio.Press the flow of oil just can realize changing the damper damping characteristic smoothly by control chamber interstitial fluid like this, and then reach the purpose of Adjustment System damping ratio.
What deserves to be mentioned is, when adopting matched in clearance between constraint block and the spring inner ring, then can only adjust the horizontal direction rigidity of spring, and then realize the adjustment of shock absorber horizontal direction intrinsic frequency.Therefore, in application, also can utilize the constraint block of part surface matched in clearance, part surface interference fit between this mechanism setting and spring inner ring, thereby provide more convenience for accurately adjusting the intrinsic frequency parameter.
Owing to be provided with damping adjusting device and rigidity adjusting device, the system damping when adjustment of intrinsic frequency no longer needs the dismounting tuning mass bumper, and it is simpler therefore to adjust operation, and operating efficiency is higher, and the parameters of acquisition is more accurate.
Embodiment three
Spring stiffness adjustable tuning quality damper of the present invention as shown in Figure 5, be with the difference of embodiment two, the rigidity adjusting device adopts and to screw in the spring 2 inner constraint blocks 11 that are provided with from the top, constraint block 11 surfaces be provided with spring 2 spring silks between the corresponding helical raised 16 in space.After constraint block 11 screwed in spring, the projection 16 on constraint block surface was stuck between the spring spring silk, made to screw in the forfeiture of section spring, thereby realized changing the function of spring rate.Constraint block 11 is adjacent the support 12 that welding is provided with on the mass and links to each other by helicitic texture, and locks with nut 13.In addition, the damper that adopts in this example is the adhesion-type damper that is made of damped cylinder 21, adhesion damping fluid 23 (being silicone oil herein) and piston 22, and damped cylinder 21 is welded on the base 6, and adhesion damping fluid 23 is housed in the cylinder.Piston 22 in a tubular form, its lower end is immersed in the adhesion damping fluid 23, piston 22 upper ends directly weldering are connected on the adjacent tuning quality piece in its top.Because piston 22 adopts tubular structure, consider that the viscosity of adhesion damping fluid is very big, the gas that is enclosed in the piston is difficult for discharging, and steam vent 24 is set on piston side wall.
During use,, select suitable spring 2, tuning quality piece 1 and adhesion-type damper, they are assembled on the base 6, constitute spring stiffness adjustable tuning quality damper of the present invention according to the design parameters of large-span steel building.To assemble then on the girder frame 10 that is placed in steel building of tuning mass bumper, make the intrinsic frequency of tuning mass bumper and steel building resonance frequency roughly the same by the quantity that changes tuning quality piece 1, accurately adjust by the screw-in depth of adjusting constraint block 11 again; Because damped cylinder is open the cooperation with piston space in the adhesion-type damper, dismounting is very convenient, can optimize the damping ratio of adhesion-type damper by the adhesion damping fluid use amount in the increase and decrease damped cylinder at any time, makes the damping property of vibration insulating system reach best.At last base plate is weldingly fixed on the girder frame 10.Certainly, the two also can to utilize securing member to carry out fixedly connected.According to the actual conditions of engineering, also shock absorber can be weldingly fixed on earlier on the girder frame 10 herein and adjust again, also can realize identical effect.For preventing that impurity such as dust and water from entering damped cylinder, utilize dustcloth 25 that open place, damper top is blocked, and lock with clip 26.
Because the damping ratio and the rigidity of system can realize accurate adjustment, the parameters that therefore this shock absorber obtains is more accurate, and effectiveness in vibration suppression is better.
This example is that representative is illustrated with four springs and an adhesion-type damper only, according to spirit of the present invention, also can varying number be set as required in the practical application even organize spring and a plurality of adhesion-type damper of different model more, it is to be noted that spring and adhesion-type damper should be uniform as far as possible, the situation of unstability occurs to avoid whole vibration insulating system.
In order to improve the anti-wear performance of constraint block 11, wearing layer or peripheral hardware wear-resistant sleeve can also be set on the constraint block surface, improve its application life.
Embodiment four
Spring stiffness adjustable tuning quality damper of the present invention as shown in Figure 6, be with embodiment two differences, the damper that adopts is the adhesion-type damper that is made of damped cylinder, adhesion damping fluid (being silicone oil herein) and piston, in order to obtain bigger damping ratio, sub-cylinder body 21b is set in the inside of damped cylinder 21a, sub-cylinder body 21b is separated into inside and outside two sub-cylinders with space in the damped cylinder, corresponding piston 22a inside also is provided with bar-shaped sub-piston 22b, and piston 22a and sub-piston 22b place in inside and outside two sub-cylinders of damped cylinder respectively and be mated.This structure has realized multiple adhesion effect, helps further improving effective work area of piston, thereby guarantees that the adhesion damper obtains bigger damping ratio under the constant situation of damped cylinder diameter.For the ease of 23 circulations of adhesion damping fluid, sub-cylinder body 21b bottom also is provided with through hole 29.Regulate the damping ratio of damper for convenience, also be provided with the damping adjusting device at adhesion-type damper used in the present invention, described damping adjusting device comprises can hole and plug 27 that is arranged on resistance cylinders 21a top and outage and the plug 28 that is arranged on resistance cylinders 21a bottom, add the adhesion damping fluid behind the plug or discharge section adhesion damping fluid just can change the real work area of piston by opening, thereby reach the purpose of the damping ratio of change damper.
During use, utilize can hole and plug 27 and outage and plug 28 to add or reduce the purpose that the adhesion damping fluid just can realize changing the damping ratio of damper at an easy rate.Utilize to adjust constraint block 11 and insert the degree of depth artificial rigidity of control spring just in the springs 2, and then reach the purpose of the intrinsic frequency of accurate control spring stiffness adjustable tuning quality damper of the present invention.The accurate adjustment of key parameter is become be more prone to realize, so the adjustment of spring stiffness adjustable tuning quality damper of the present invention is easier, vibration isolating effect is better.
Embodiment five
Spring stiffness adjustable tuning quality damper of the present invention as shown in Figure 7 is that with the difference of embodiment one the tuning quality piece is arranged to two parts, comprises parenchyma gauge block 1b and is symmetricly set on the quality of regulation piece 1a of parenchyma gauge block 1b top.Regulate the damping ratio of damper for convenience, adopt the adhesion-type damper that constitutes by damped cylinder, adhesion damping fluid (being silicone oil) and piston herein.Wherein, set up sub-cylinder body 21b in resistance cylinders 21a inside, piston 22 cooperates with resistance cylinders 21a and sub-cylinder body 21b simultaneously, and the damper bigger damping ratio of acquisition under the constant situation of damped cylinder diameter like this guarantees to adhere.Piston 22 tops are provided for the through hole 24 of exhaust.Resistance cylinders 21a and sub-cylinder body 21b and base 6 welderings connect, and piston 22 connects with top parenchyma gauge block 1b weldering.Also be provided with the damping adjusting device at adhesion-type damper used in the present invention, described damping adjusting device comprises can hole and plug 27 that is arranged on the parenchyma gauge block 1b and outage and the plug 28 that is arranged on resistance cylinders 21a bottom.Add the adhesion damping fluid behind the plug or discharge section adhesion damping fluid just can change the real work area of piston by opening, thereby reach the purpose of the damping ratio of change damper.For the ease of 23 circulations of adhesion damping fluid, sub-cylinder body 21b bottom also is provided with through hole 29.(ratio of the two is about 1: 3 because the side clearance between piston and the damped cylinder is much smaller than the contact length at axis direction of piston and damping fluid, generally speaking less than guide effect is promptly arranged at 1: 1.5), also improved the vertical guide effect of damper simultaneously, therefore more stable during system works, need not extra guiding device.
For the ease of accurately regulating the intrinsic frequency of spring stiffness adjustable tuning quality damper of the present invention, in solidifying tube 8, epoxy resin is set as curing materials.Epoxy resin is melt into liquid back injects the curing tube, make the spring section of itself and submergence be solidified into one, the elasticity of the spring section that is cured is like this lost substantially, the number of active coils that is equivalent to spring reduces, so just can artificially adjust the rigidity of spring, and then the intrinsic frequency of control spring stiffness adjustable tuning quality damper of the present invention.
Owing to be provided with damping adjusting device and rigidity adjusting device, the system damping when adjustment of intrinsic frequency no longer needs the dismounting tuning mass bumper, and it is simpler therefore to adjust operation, and operating efficiency is higher, and the parameters of acquisition is more accurate.
Embodiment six
As shown in Figure 8, be with the difference of embodiment five, the damping adjusting device be fixedly installed on piston 22 1 ends heighten double-screw bolt 30, heighten double-screw bolt 30 and link to each other by helicitic texture, and utilize nut 31 fixing and lockings with its top mass 1b.Because the damping ratio of adhesion-type damper is directly proportional with effective adhesion work area that piston 22 moves up and down in the process in damped cylinder 21 and the adhesion damping fluid comes in contact, therefore, by the whole double-screw bolt 30 of heightening that withers, just can change the immersion depth of piston 22 in adhesion damping fluid 23, just change effective work area of piston, thereby reach the purpose of the damping ratio that changes damper.
It is easier directly that mode is adjusted in this damping, and need not to change the use amount of adhesion damping fluid, very easy operation.Adopt the spring stiffness adjustable tuning quality damper of the present invention of rigidity adjusting device and damping adjusting device simultaneously, can better realize parameter optimization, thereby give full play to its damping effect.
Embodiment seven
The principle according to embodiment six, as shown in Figure 9, the damping adjusting device also can be fixedly installed on damped cylinder 21 1 ends heighten double-screw bolt 30, heighten the framework that is provided with on double-screw bolt 30 and its below base 6 and link to each other, and utilize nut 31 fixing and lockings.Like this,, change the relative position between damped cylinder 21 and the piston 22, just can change the immersion depth of piston 22 in adhesion damping fluid 23, thereby reach the purpose of the damping ratio that changes damper by the whole double-screw bolt 30 of heightening that withers.
Use the spring stiffness adjustable tuning quality damper of the present invention of this structure, can the end back is installed carry out the adjusting of damping ratio parameter, very convenient practicality from the outside at any time with treating damping component at TMD.
Embodiment eight
Spring in the spring stiffness adjustable tuning quality damper of the present invention also can use leaf spring, and as shown in figure 10, spring 2 adopts leaf spring, and the two ends of leaf spring link to each other with the case beam 10 of tuning quality piece 1 and certain Longspan Bridge respectively.The adhesion-type damper is arranged on tuning quality piece below, and links together with tuning quality piece 1 and case beam 10 respectively by the flange of its upper and lower settings.For the ease of adjusting the rigidity of spring 2, below spring 2, also be provided with the rigidity adjusting device.Described rigidity adjusting device comprises the polylith constraint block 11 that is provided with on the leaf spring, and constraint block 11 is fixed on the case beam 10 by bolt 33 and nut 32.By increasing or reduce the quantity of constraint block 11, just can change the actual leaf spring length that participates in vibration, thereby reach the purpose that changes rigidity of plate spring and shock absorber intrinsic frequency.
As shown in figure 11, resistance cylinders 21a volume inside is that criss-cross dividing plate 34 is divided into four sub-cylinders by the cross section, the piston 22 that four cross sections are rectangle lays respectively in the sub-cylinder, cooperates with four tabular sub-cylinder body 21b being provided with in the sub-cylinder simultaneously, can produce bigger damping force like this.In order to increase the adhesion resistance, certain guiding is provided simultaneously, the bottom of piston 22 is provided with flow-disturbing guide ring 35 respectively.Regulate the damping ratio of damper for convenience, also be provided with the damping adjusting device at adhesion-type damper used in the present invention, described damping adjusting device comprises can hole and plug 27 that is arranged on resistance cylinders 21a top and outage and the plug 28 that is arranged on resistance cylinders 21a bottom, just can realize changing the purpose of damper damping ratio by the use amount of increase and decrease adhesion damping fluid 23.
This routine described technical scheme is applicable to the application places that only needs vertical vibration damping, and the rigidity adjusting device that is adopted in this example also is only applicable to adjust the vertical stiffness of diagram leaf spring.
Spring stiffness adjustable tuning quality damper of the present invention can effectively suppress bridge or the resonant reaction of thin and tall fabric structure under external exciting force effect, guarantee the safety of bridge construction and personnel's vehicle, and it is simple in structure, superior performance, economic benefit and social benefit are all very remarkable, have highly application value, can be widely used in the dependency structures such as airport connecting bridge, pedestrian overcrossing, harbour trestle and thin and tall building of various large spans.
Claims (15)
1, a kind of spring stiffness adjustable tuning quality damper comprises mass, spring, damper and base, and wherein, spring can be helical spring, dish spring or leaf spring, it is characterized in that spring end is provided with the rigidity adjusting device.
2, spring stiffness adjustable tuning quality damper according to claim 1 is characterized in that the rigidity adjusting device comprises curing tube and curing materials, and curing materials and spring are arranged on and solidify in the tube, and spring section is embedded in the curing materials.
3, spring stiffness adjustable tuning quality damper according to claim 2, it is characterized in that described curing materials comprises the metal material or the macromolecular material of low melting point, normal temperature curable, or two components and many components composite material that can solidify after the normal temperature mixing.
4, spring stiffness adjustable tuning quality damper according to claim 1 is characterized in that the rigidity adjusting device is a constraint block, and constraint block inserts from an end and is arranged at spring inner, or is provided with along the spring surface.
5, spring stiffness adjustable tuning quality damper according to claim 4, it is characterized in that constraint block surface be provided with spring spring silk between corresponding helical raised or the wearing layer in space, or peripheral hardware wear-resistant sleeve.
6, spring stiffness adjustable tuning quality damper according to claim 1 is characterized in that damper is a hole throttle type hydraulic damper, between its piston two ends chamber UNICOM's pipeline is set, and also is provided with control valve on UNICOM's pipeline.
7, spring stiffness adjustable tuning quality damper according to claim 1, it is characterized in that damper is the adhesion-type damper that is made of damped cylinder, adhesion damping fluid and piston, wherein, piston and adhesion damping fluid are arranged in the damped cylinder, and piston to small part immerses in the adhesion damping fluid.
8, spring stiffness adjustable tuning quality damper according to claim 7 is characterized in that the adhesion-type damper is provided with the damping adjusting device.
9, spring stiffness adjustable tuning quality damper according to claim 8 is characterized in that the damping adjusting device comprises the double-screw bolt of heightening that is fixedly installed on piston one end, heightens double-screw bolt and links to each other with its top mass or base.
10, spring stiffness adjustable tuning quality damper according to claim 8 is characterized in that the damping adjusting device comprises the double-screw bolt of heightening that is fixedly installed on damped cylinder one end, heightens double-screw bolt and links to each other with the base or the mass of its below.
11, spring stiffness adjustable tuning quality damper according to claim 8 is characterized in that the damping adjusting device comprises the can hole of resistance cylinders top or top setting and the outage of resistance cylinders bottom or below setting, and outage is provided with plug.
12, according to claim 7 or 8 described spring stiffness adjustable tuning quality dampers, it is characterized in that piston is a tubulose, or/and bar-shaped, or/and tabular.
13, according to claim 7 or 8 described spring stiffness adjustable tuning quality dampers, it is characterized in that resistance cylinders inside is provided with at least one sub-cylinder, communicate with each other between the sub-cylinder, piston cooperates with resistance cylinders and sub-cylinder body simultaneously, or the sub-piston of quantity and sub-cylinder quantity Matching is set.
14, spring stiffness adjustable tuning quality damper according to claim 13, when it is characterized in that piston or sub-piston are tubular structure, on the piston or/and on the sub-piston steam vent is set.
15, according to claim 1 or 7 described spring stiffness adjustable tuning quality dampers, it is characterized in that being provided with guiding device between mass and the base, guiding device independently is provided with or is integrated among the damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100826548A CN101457553B (en) | 2007-12-14 | 2008-02-25 | Spring stiffness adjustable tuning quality damper |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710115262.2 | 2007-12-14 | ||
| CN200710115262 | 2007-12-14 | ||
| CN2008100826548A CN101457553B (en) | 2007-12-14 | 2008-02-25 | Spring stiffness adjustable tuning quality damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101457553A true CN101457553A (en) | 2009-06-17 |
| CN101457553B CN101457553B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100826548A Active CN101457553B (en) | 2007-12-14 | 2008-02-25 | Spring stiffness adjustable tuning quality damper |
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| CN (1) | CN101457553B (en) |
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| CN106286663A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | A kind of disk spring antivibrator of scalable rigidity in early days |
| CN106286669A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | The coiled spring damper that a kind of early stage rigidity is predeterminable |
| CN106286699A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | A kind of complex spring antivibrator of scalable rigidity in early days |
| CN106369094A (en) * | 2016-10-17 | 2017-02-01 | 安徽信泽科技有限公司 | Pull rod guide type disc spring damper |
| CN106382314A (en) * | 2016-10-17 | 2017-02-08 | 安徽信泽科技有限公司 | Early rigidity-adjustable disk spring damper |
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| CN106499763A (en) * | 2016-10-17 | 2017-03-15 | 安徽信泽科技有限公司 | A kind of coiled spring damper that can adjust early stage rigidity |
| CN106641094A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Dynamic vibration absorber for fan stator and installation method of dynamic vibration absorber |
| CN106760847A (en) * | 2016-12-20 | 2017-05-31 | 上海史狄尔建筑减震科技有限公司 | Full assembled tuned mass damper, TMD |
| CN107202225A (en) * | 2017-06-06 | 2017-09-26 | 于法周 | A kind of adjustable for height train axle process equipment base |
| CN107815954A (en) * | 2017-12-06 | 2018-03-20 | 哈尔滨市市政工程设计院 | The overpass or steel suspension bridge of Vibration Active Control are realized based on pneumatic muscles |
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| CN108331874A (en) * | 2018-03-09 | 2018-07-27 | 柳州东方工程橡胶制品有限公司 | A kind of spring vibration-isolator |
| CN108362460A (en) * | 2018-04-08 | 2018-08-03 | 天津大学 | A kind of multidirectional adjustable rigidity spring suitable for multiple spot shaketalle test simulating boundary |
| CN108678895A (en) * | 2018-06-06 | 2018-10-19 | 中国海洋大学 | Dynamic adjustable rigidity vortex-induced vibration marine tidal-current energy conversion equipment and its control method |
| CN108799390A (en) * | 2018-07-10 | 2018-11-13 | 安徽省交通控股集团有限公司 | A kind of vibration absorber and its parameter regulation means |
| CN108824665A (en) * | 2018-08-02 | 2018-11-16 | 绍兴职业技术学院 | A kind of damping for assembled architecture |
| CN108842919A (en) * | 2018-07-19 | 2018-11-20 | 佛山科学技术学院 | A kind of three-dimensional shock isolation support |
| CN109024299A (en) * | 2017-05-20 | 2018-12-18 | 董英山 | A kind of working method of bridge construction damping device |
| CN109163046A (en) * | 2018-10-25 | 2019-01-08 | 华北水利水电大学 | Ternary vibration absorber, design and the assembly method of parallel connection used matter and spring unit |
| CN109185378A (en) * | 2018-10-01 | 2019-01-11 | 湖州杭佳弹簧有限公司 | Adjustable shock |
| CN109510378A (en) * | 2018-12-28 | 2019-03-22 | 浙江荣捷特科技有限公司 | A kind of Stirling motor vibration insulating system |
| CN109518598A (en) * | 2018-12-29 | 2019-03-26 | 徐亮 | Building support, regulating device and the adjusting method of two-way adjustment height |
| CN109837807A (en) * | 2019-01-21 | 2019-06-04 | 株洲时代新材料科技股份有限公司 | A kind of track floating plate vibration isolator |
| CN110715007A (en) * | 2019-10-17 | 2020-01-21 | 河海大学常州校区 | Variable-turn-number shock absorber for robot moving platform |
| CN110792030A (en) * | 2019-11-28 | 2020-02-14 | 福州大学 | Bridge shock absorber based on metal rubber and working method thereof |
| CN111074760A (en) * | 2019-12-31 | 2020-04-28 | 武汉理工大学 | Vibration isolation device with adjustable vertical rigidity |
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| CN111706636A (en) * | 2020-07-03 | 2020-09-25 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Self-adaptive vibration damping base suitable for high-frequency vibration environment |
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| CN114250656A (en) * | 2022-01-04 | 2022-03-29 | 中国建筑第五工程局有限公司 | Vibration-damping rubber pad capable of effectively reducing vibration |
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| CN102220789A (en) * | 2011-04-14 | 2011-10-19 | 上海昭瑞减震科技有限公司 | Suspension type floating plate vibration isolation system |
| CN102220789B (en) * | 2011-04-14 | 2012-09-05 | 上海昭瑞减震科技有限公司 | Suspension type floating plate vibration isolation system |
| CN103016587A (en) * | 2012-12-12 | 2013-04-03 | 上海交通大学 | Semi-driving type variable stiffness dynamic vibration absorber made from conical springs |
| CN103016587B (en) * | 2012-12-12 | 2015-04-01 | 上海交通大学 | Semi-driving type variable stiffness dynamic vibration absorber made from conical springs |
| CN103016605A (en) * | 2012-12-17 | 2013-04-03 | 南京航空航天大学 | Liquid resistance type dynamic vibration absorber with adjustable parameters |
| CN103016605B (en) * | 2012-12-17 | 2014-08-06 | 南京航空航天大学 | Liquid resistance type dynamic vibration absorber with adjustable parameters |
| CN103074947B (en) * | 2013-01-11 | 2014-12-03 | 株洲时代新材料科技股份有限公司 | Tuned mass damper adjustable in three directions |
| CN103074947A (en) * | 2013-01-11 | 2013-05-01 | 株洲时代新材料科技股份有限公司 | Tuned mass damper adjustable in three directions |
| CN103277454A (en) * | 2013-05-09 | 2013-09-04 | 张春巍 | Tuning rotational inertia damping vibration attenuation device |
| CN103277454B (en) * | 2013-05-09 | 2016-05-18 | 张春巍 | Tuning rotary inertia damping device |
| CN103334509A (en) * | 2013-07-10 | 2013-10-02 | 隔而固(青岛)振动控制有限公司 | High-frequency tuning mass damper |
| CN103334509B (en) * | 2013-07-10 | 2016-03-16 | 隔而固(青岛)振动控制有限公司 | High-frequency tuning mass bumper |
| CN103925331A (en) * | 2013-07-29 | 2014-07-16 | 中国航空规划建设发展有限公司 | Rigidity adjusting device for spiral springs and tuned mass damping device |
| CN103925331B (en) * | 2013-07-29 | 2016-03-23 | 中国航空规划设计研究总院有限公司 | For helical spring rigidity adjuster and tuning quality vibration damping equipment |
| CN103835384A (en) * | 2013-12-30 | 2014-06-04 | 同济大学 | Mass resonance regulating and vibration damping device |
| CN103967985A (en) * | 2014-01-16 | 2014-08-06 | 三一重机有限公司 | Adjustable shock absorber and system and method for designing shock absorber |
| CN103967985B (en) * | 2014-01-16 | 2016-02-10 | 三一重机有限公司 | Adjustable shock, absorber designing system and method |
| CN103774771A (en) * | 2014-01-26 | 2014-05-07 | 智性科技南通有限公司 | Rigidity and dampness integrating horizontal omnidirectional tuned mass damper |
| CN103774771B (en) * | 2014-01-26 | 2016-05-18 | 智性科技南通有限公司 | A kind of rigidity and the integrated horizontal omnirange tuned mass damper of damping |
| CN104294954A (en) * | 2014-09-18 | 2015-01-21 | 中国地震局工程力学研究所 | Spherical hinge type three-way shock insulation pedestal arranged on upper portion of guide rail disc spring |
| CN104294954B (en) * | 2014-09-18 | 2016-07-06 | 中国地震局工程力学研究所 | A kind of guide rail disc spring top ball pivot three-dimensional shock isolation pedestal |
| CN105133745A (en) * | 2015-09-28 | 2015-12-09 | 武汉斯坦迪减振技术有限公司 | Vibration damper |
| CN106641094B (en) * | 2015-11-04 | 2018-11-13 | 株洲时代新材料科技股份有限公司 | A kind of fan stator dynamic vibration absorber and its installation method |
| CN106641094A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Dynamic vibration absorber for fan stator and installation method of dynamic vibration absorber |
| CN105471124A (en) * | 2015-12-18 | 2016-04-06 | 北京金风科创风电设备有限公司 | Vibration-absorbing apparatus for motor stator, motor stator and motor |
| CN105471124B (en) * | 2015-12-18 | 2018-08-24 | 北京金风科创风电设备有限公司 | Shock-absorbing means, motor stator and the motor of motor stator |
| CN105821983A (en) * | 2016-04-01 | 2016-08-03 | 东南大学 | Multidimensional vibration/shock-absorbing tuned mass damper |
| CN105821983B (en) * | 2016-04-01 | 2017-12-22 | 东南大学 | A kind of tuned mass damper of multidimensional vibration reduction/shake |
| CN106286669B (en) * | 2016-10-17 | 2018-07-20 | 安徽信泽科技有限公司 | A kind of coiled spring damper that early stage rigidity is predeterminable |
| CN106286699B (en) * | 2016-10-17 | 2018-08-31 | 厦门盛业世纪智能科技有限公司 | A kind of complex spring damper of adjustable early stage rigidity |
| CN106499763A (en) * | 2016-10-17 | 2017-03-15 | 安徽信泽科技有限公司 | A kind of coiled spring damper that can adjust early stage rigidity |
| CN106382314A (en) * | 2016-10-17 | 2017-02-08 | 安徽信泽科技有限公司 | Early rigidity-adjustable disk spring damper |
| CN106438805A (en) * | 2016-10-17 | 2017-02-22 | 安徽信泽科技有限公司 | Pull rod guide type complex spring damper |
| CN106286663A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | A kind of disk spring antivibrator of scalable rigidity in early days |
| CN106369094A (en) * | 2016-10-17 | 2017-02-01 | 安徽信泽科技有限公司 | Pull rod guide type disc spring damper |
| CN106286669A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | The coiled spring damper that a kind of early stage rigidity is predeterminable |
| CN106286663B (en) * | 2016-10-17 | 2018-03-27 | 安徽信泽科技有限公司 | A kind of disk spring damper of adjustable early stage rigidity |
| CN106369094B (en) * | 2016-10-17 | 2018-07-10 | 安徽信泽科技有限公司 | A kind of pull rod guide type disk spring damper |
| CN106286699A (en) * | 2016-10-17 | 2017-01-04 | 安徽信泽科技有限公司 | A kind of complex spring antivibrator of scalable rigidity in early days |
| CN106760847A (en) * | 2016-12-20 | 2017-05-31 | 上海史狄尔建筑减震科技有限公司 | Full assembled tuned mass damper, TMD |
| CN109024299A (en) * | 2017-05-20 | 2018-12-18 | 董英山 | A kind of working method of bridge construction damping device |
| CN107202225A (en) * | 2017-06-06 | 2017-09-26 | 于法周 | A kind of adjustable for height train axle process equipment base |
| CN107202225B (en) * | 2017-06-06 | 2019-04-26 | 张素平 | A kind of height-adjustable train axle process equipment pedestal |
| CN107815954B (en) * | 2017-12-06 | 2023-11-10 | 哈尔滨市市政工程设计院 | Pedestrian overpass or steel temporary bridge realizing active vibration control based on pneumatic muscles |
| CN107815954A (en) * | 2017-12-06 | 2018-03-20 | 哈尔滨市市政工程设计院 | The overpass or steel suspension bridge of Vibration Active Control are realized based on pneumatic muscles |
| CN108302156A (en) * | 2018-02-06 | 2018-07-20 | 京东方科技集团股份有限公司 | Vibration absorber and conveyer |
| CN108331874A (en) * | 2018-03-09 | 2018-07-27 | 柳州东方工程橡胶制品有限公司 | A kind of spring vibration-isolator |
| CN108362460A (en) * | 2018-04-08 | 2018-08-03 | 天津大学 | A kind of multidirectional adjustable rigidity spring suitable for multiple spot shaketalle test simulating boundary |
| CN108362460B (en) * | 2018-04-08 | 2022-12-27 | 天津大学 | Multidirectional adjustable stiffness spring suitable for multipoint shaking table test simulation boundary |
| CN108678895A (en) * | 2018-06-06 | 2018-10-19 | 中国海洋大学 | Dynamic adjustable rigidity vortex-induced vibration marine tidal-current energy conversion equipment and its control method |
| CN108799390A (en) * | 2018-07-10 | 2018-11-13 | 安徽省交通控股集团有限公司 | A kind of vibration absorber and its parameter regulation means |
| CN108842919A (en) * | 2018-07-19 | 2018-11-20 | 佛山科学技术学院 | A kind of three-dimensional shock isolation support |
| CN108824665A (en) * | 2018-08-02 | 2018-11-16 | 绍兴职业技术学院 | A kind of damping for assembled architecture |
| CN109185378A (en) * | 2018-10-01 | 2019-01-11 | 湖州杭佳弹簧有限公司 | Adjustable shock |
| CN109185378B (en) * | 2018-10-01 | 2023-10-27 | 湖州杭佳弹簧有限公司 | Adjustable vibration damper |
| CN109163046A (en) * | 2018-10-25 | 2019-01-08 | 华北水利水电大学 | Ternary vibration absorber, design and the assembly method of parallel connection used matter and spring unit |
| CN109510378A (en) * | 2018-12-28 | 2019-03-22 | 浙江荣捷特科技有限公司 | A kind of Stirling motor vibration insulating system |
| CN109518598A (en) * | 2018-12-29 | 2019-03-26 | 徐亮 | Building support, regulating device and the adjusting method of two-way adjustment height |
| CN109837807A (en) * | 2019-01-21 | 2019-06-04 | 株洲时代新材料科技股份有限公司 | A kind of track floating plate vibration isolator |
| CN113396281A (en) * | 2019-02-08 | 2021-09-14 | 株式会社电装 | Vibration-proof device |
| CN113396281B (en) * | 2019-02-08 | 2023-02-28 | 株式会社电装 | Vibration-proof device |
| CN110715007A (en) * | 2019-10-17 | 2020-01-21 | 河海大学常州校区 | Variable-turn-number shock absorber for robot moving platform |
| CN110792030A (en) * | 2019-11-28 | 2020-02-14 | 福州大学 | Bridge shock absorber based on metal rubber and working method thereof |
| CN110792030B (en) * | 2019-11-28 | 2024-05-31 | 福州大学 | Bridge damper based on metal rubber and working method thereof |
| CN111074760A (en) * | 2019-12-31 | 2020-04-28 | 武汉理工大学 | Vibration isolation device with adjustable vertical rigidity |
| CN111503202A (en) * | 2020-03-20 | 2020-08-07 | 上海交通大学 | Semi-active tuned mass inertia damper |
| CN111706636A (en) * | 2020-07-03 | 2020-09-25 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Self-adaptive vibration damping base suitable for high-frequency vibration environment |
| CN112160195A (en) * | 2020-08-21 | 2021-01-01 | 中铁工程设计咨询集团有限公司 | Road bed bump leveller and road bed bump leveller system of shaking |
| CN113502934A (en) * | 2021-01-07 | 2021-10-15 | 中国建筑标准设计研究院有限公司 | Three-dimensional shock insulation support based on friction pendulum |
| CN113502934B (en) * | 2021-01-07 | 2022-08-09 | 中国建筑标准设计研究院有限公司 | Three-dimensional shock insulation support based on friction pendulum |
| CN112854472A (en) * | 2021-01-20 | 2021-05-28 | 重庆三峡学院 | Full-assembly type concrete node device with replaceable seismic isolation and reduction devices |
| CN112854472B (en) * | 2021-01-20 | 2022-07-01 | 重庆三峡学院 | Full-assembly type concrete node device with replaceable seismic isolation and reduction devices |
| CN114250656A (en) * | 2022-01-04 | 2022-03-29 | 中国建筑第五工程局有限公司 | Vibration-damping rubber pad capable of effectively reducing vibration |
| CN114635940A (en) * | 2022-05-16 | 2022-06-17 | 徐州台铃车业有限公司 | Damping device for electric vehicle capable of automatically adjusting damping according to road conditions |
| CN115637611B (en) * | 2022-11-04 | 2023-05-02 | 中铁十局集团城建工程有限公司 | Station positive line bridge damping device |
| CN115637611A (en) * | 2022-11-04 | 2023-01-24 | 中铁十局集团城建工程有限公司 | Damping device for station main line bridge |
| CN117248647A (en) * | 2023-11-07 | 2023-12-19 | 道尔道科技股份有限公司 | Interval adjustable tuning mass damper |
| CN117248647B (en) * | 2023-11-07 | 2024-05-17 | 道尔道科技股份有限公司 | Interval adjustable tuning mass damper |
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