JP6230833B2 - Suppression method for vehicle body ups and downs of slab track trains - Google Patents

Description

  The present invention relates to a method for suppressing vehicle body up-and-down shaking of a train on a slab track when traveling on a railroad track.

  Conventionally, when a train travels, it has been revealed that a 14 Hz vertical oscillation occurs in a frame-type slab track section (see Non-Patent Document 1 below).

  Therefore, when the space in the frame of the frame-type slab was filled, the mechanism was unknown, but it was possible to suppress the up and down movement of the train body.

Kubota, “A Study on Countermeasures for Shaking in Tunnel Section”, Journal of Japan Railway Facilities Association, 2013.1 L. C. Fang, D.C. Nicolaou and J.M. W. Cleaner, Transient Removable of Contaminated Fluid from Cavity, International Journal of Heat and Fluid Flow, Vol. 20, no. 6, 1999, pp. 605-613.

  As described above, when the frame of the frame-type slab is filled, the mechanism is unknown, but based on the ability to suppress the up and down motion of the train body, the mechanism is clarified and the frame-type slab A study was conducted to suppress the up-and-down motion of the train on the slab track during the running of the train in the track section.

In view of the above situation, the present invention clarifies the vehicle body up-and-down shaking countermeasure method by calculating the air pressure change at the time of passing the train on the frame-type slab track at the time of train traveling , and the train body of the train by a simpler method. It is an object of the present invention to provide a method for suppressing vertical movement of a vehicle body of a train on a slab track that can suppress vertical movement.

In order to achieve the above object, the present invention provides
[1] In a train method vehicle vertical fluctuation suppression of slab track during a train running by installing the inhibition means for inhibiting the flow of air into the frame slab cavity, the vehicle body vertical sway train Ri by the air force A vehicle body up-and-down swing suppression method for a train on a slab track during travel of the train, where L / D is 4 or less when the blocking means is a cavity depth D and length L. It is characterized by installing.

[2] The vehicle body up-and-down swing suppression method for a train on a slab track during train traveling as described in [1] above, wherein the blocking means is a partition plate that blocks air flow to the frame space of the frame slab. It is characterized by being.

[3] The method of suppressing the vehicle body up-and-down shaking of the train on the slab track at the time of running the train according to [1], wherein the inhibition means is a ballast that inhibits an air flow into a formwork space of the formwork slab. A vehicle body up-and-down swing suppression method for a slab track train.

[4] The vehicle body up-and-down fluctuation suppressing method of the train on the slab track during the train traveling as described in [1] above, wherein the inhibition means inhibits the flow of air to the formwork space of the frame-type slab. It is a combination of plates.

  According to the present invention, it is not necessary to fill the entire space in the frame of the frame-type slab with respect to the pressure fluctuation reduction measures on the slab track during train travel, and the inhibiting means is installed so as to inhibit the air flow into the space. By doing so, the effect of reducing the up and down motion of the train body due to the aerodynamic force can be obtained, and the problem of the up and down motion of the train body due to the aerodynamic force can be solved.

It is a drawing substitute photograph which shows the slab track | truck at the time of the train travel concerning this invention. It is a schematic diagram which shows the pressure fluctuation reduction countermeasure construction method in the slab track | truck at the time of the train travel which concerns on this invention. It is a schematic diagram of the positional relationship and flow model of a vehicle lower surface, a rail, and a slab track. It is a figure which shows the 2-dimensional numerical calculation example of a steady cavity flow. It is a schematic diagram which shows the vehicle body up-and-down fluctuation suppression method of the train of the slab track at the time of train travel which shows the 1st-5th Example of this invention.

Vehicle vertical fluctuation suppression method for slab track during a train traveling train of the present invention, by installing the inhibition means for inhibiting the flow of air into the frame slab cavity, the vehicle body vertical sway train Ri by the air force A vehicle body up-and-down swing suppression method for a train on a slab track during travel of the train, where L / D is 4 or less when the blocking means is a cavity depth D and length L. Install .

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a drawing-substituting photograph showing a slab track during train traveling according to the present invention, and FIG. 2 is a schematic diagram showing a method for reducing pressure fluctuations in the slab track during train traveling according to the present invention. Is a sectional view in the rail longitudinal direction, and FIG. 2B is a sectional view in the sleeper direction.

  In FIG. 1, 1 is a rail, 2 is a frame-type slab track, and 3 is a space (cavity) of the frame-type slab track 2.

In FIG. 2, 5 is a roadbed, 6 is a frame-type slab plate, 7 is a blocking means (ballast, PC plate, etc.), 8 is a frame space (cavity) of the frame-type slab plate 6, and 9 is a rail. Further, the material of the inhibiting means is not limited to the above.

  FIG. 3 is a schematic diagram of the positional relationship and flow model of the vehicle lower surface, rail and slab track, FIG. 4 is a diagram showing a two-dimensional numerical calculation example of the steady cavity flow, and FIG. When the depth D = 1, FIG. 4B is a diagram showing the case where the cavity length L / depth D = 4.

  In FIG. 3, 11 is a roadbed, 12 is a frame-type slab board, 13 is a space (cavity), 14 is a rail, and 15 is a vehicle body.

  It was estimated that the flow on the lower surface of the vehicle body 15 was in the state shown in FIG. Therefore, based on this model, pressure fluctuation reduction measures were examined from the viewpoint of the flow mechanism that generates pressure fluctuations.

  In the model, it was estimated that the shear flow was excited by the shearing motion of the lower surface of the vehicle body 15 and the flow flowed into the space (cavity) 13 in the frame of the frame-type slab plate 12 to cause pressure fluctuation. Therefore, it is considered that measures should be taken so that this shear flow does not flow into the space (cavity) 13 in the frame of the frame-type slab plate 12.

  When a flow exists in the space (cavity) 13, the flow in the space (cavity) 13 varies depending on the depth D, the length L, and the like. An example is shown in FIG. FIG. 4 is a two-dimensional numerical calculation example (see Non-Patent Document 2), and the solid line represents a streamline. In FIG. 4, until the ratio L / D of the depth D and the length L of the space (cavity) 13 is several times (four times in FIG. 4), a rotational flow is generated in the space (cavity) 13. It has been confirmed that the flow of the flow path is difficult to flow into the space (cavity) 13. For this reason, it is not necessary to fill all the spaces (cavities) 13 in the frame of the frame-type slab plate 12 as a countermeasure for reducing pressure fluctuations, and obstructing means (ballasts and partitions) are used to inhibit the flow into the spaces (cavities) 13. It is considered that a reduction effect can be obtained by installing a plate.

  FIG. 5 is a schematic diagram showing a vehicle body up-and-down shaking suppression method for a train on a slab track during train traveling according to the first to fifth embodiments of the present invention.

In this figure, 21 is a roadbed, 22 is a frame-type slab plate, 23 is a blocking means ( ballast , PC plate, etc.) , 24 is a space (cavity), 25 is a rail, 26, 26 ', and 26 "are partition plates .

  From the schematic diagram of the frame-type slab plate in FIG. 5, the space depth D = 210 mm and the length L = 2900 mm in the frame of the frame-type slab plate, the ratio is L / D = 13.8. In order to inhibit the flow of the frame-type slab plate to the space in the frame, it is considered that this ratio L / D = 13.8 should be several times. From this, for example, a countermeasure as shown in FIG. 5 can be considered. The first embodiment shown in FIG. 5A and the second embodiment shown in FIG. 5B are the measures “ballast filling” and “PC board installation” for filling the space in the frame of the frame-type slab plate 22, and the entire space. Are not installed, but are installed with an interval (length L) of several times the depth D. 5C, the space 24 in the frame of the frame-type slab plate 22 may be divided into a plurality of spaces (cavities) 24 by a partition plate. In the fourth embodiment shown in FIG. 5D and the fifth embodiment shown in FIG. 5E, the ballast 23 and the partition plates 26, 26 ′, and 26 ″ are combined.

  In addition, in the dimension in the above-mentioned Example, it described as an example, it is not limited to this, It cannot be overemphasized that another dimension may be sufficient.

  According to the present invention, it is not necessary to fill the entire space in the frame of the frame-type slab with respect to the pressure fluctuation reduction measures on the slab track during train travel, and the inhibiting means is installed so as to inhibit the air flow into the space. By doing so, the effect of reducing the up and down motion of the train body due to the aerodynamic force can be obtained, and the up and down motion of the train body due to the aerodynamic force can be prevented.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The vehicle body up-and-down fluctuation suppression method of a train on a slab track of the present invention when traveling by installing a blocking means so as to block the flow of air to the space in the frame of the frame-type slab, It can be used as a vehicle body up-and-down vibration suppression method for a train on a slab track when the train travels, which can provide a vehicle body up-and-down vibration reduction effect and solves the problem of the vehicle body up-and-down vibration caused by aerodynamic forces.

1 , 9, 14 , 25 rail 2 Frame type slab track 3 , 13 , 24 Space (cavity) of frame type slab track
5, 11 , 21 Roadbed
6, 12 , 22 Frame type slab board
7,23 Inhibiting means to inhibit air flow to space (cavity)
Formwork space (cavity) of 8- frame slab plate 6
15 Car body 26, 26 ', 26 "partition plate

Claims (4)

By installing the inhibition means for inhibiting the flow of air into the frame slab cavity, there in the vehicle body vertical fluctuation suppression method train slab track number when suppressing a train traveling on a vehicle body vertical sway train Ri by the air force The obstruction means is installed so that L / D is 4 or less when the depth D and the length L of the cavity are set. Suppression method. 2. The method of suppressing the vehicle body up-and-down shaking of a train on a slab track during train travel according to claim 1, wherein the inhibiting means is a partition plate that inhibits air flow to a formwork space of the frame-type slab. The vehicle body up-and-down shaking suppression method of the train of the slab track at the time of train driving. The vehicle body up-and-down swing suppression method for a train on a slab track during train travel according to claim 1, wherein the inhibition means is a ballast that inhibits the flow of air into the formwork space of the formwork slab. For suppressing vertical movement of a train on a slab track when the train is running. The method of suppressing vehicle body up-and-down oscillation of a train on a slab track during train travel according to claim 1, wherein the inhibiting means is a combination of a ballast and a partition plate that inhibits the flow of air to the formwork space of the frame-type slab. A method for suppressing vehicle body up-and-down shaking of a train on a slab track when the train is running.