CN107665286A - One kind is on automobile engine bearings dynamic analysis method - Google Patents
One kind is on automobile engine bearings dynamic analysis method Download PDFInfo
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- CN107665286A CN107665286A CN201711045972.2A CN201711045972A CN107665286A CN 107665286 A CN107665286 A CN 107665286A CN 201711045972 A CN201711045972 A CN 201711045972A CN 107665286 A CN107665286 A CN 107665286A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 239000010721 machine oil Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009510 drug design Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
One kind is on automobile engine bearings dynamic analysis method, the present invention is to use Excite Power Unit softwares, and rational engine finite element digital-to-analogue is established in joint finite element analysis, accurate dynamic analysis calculating is carried out to engine bearing, the critical evaluation result of engine bearing lubrication is obtained, and is reasonably evaluated and optimizes the characteristic of engine lubrication bearing.The invention is efficiently and accurately to evaluating and optimizing engine link.
Description
Technical field
The invention belongs to engine bearing power technology field, and more particularly to one kind is on automobile engine bearings dynamics
Analysis method.
Background technology
For internal combustion engine during being operated, sliding bearing is one of important component for determining normal working of engine.It is existing
Nowadays, the engine with supercharger of the high power high pulling torque of the low discharge capacity of automobile carrying is applied to more and more extensive, and efficient rational
Design main bearing of engine just seems particularly concerned with connecting-rod bearing parameter.
During rational design sliding bearing is carried out, reply uses advanced analytical technology, with reference to engine bearing work
Make principle, rational analysis design carried out to engine bearing, avoid the abnormal pressure distribution of bearing film, eliminate bearing because
Caused by Rough Contact pressure is excessive phenomena such as excessive wear, there is important guidance to the dynamic property economy for lifting engine
Meaning.
The check method of traditional bearing design is to carry out Inspection and analysis by research technique, and research technique has very
More limitations.The reliability demonstration of bearing needs to establish test-bed, while needs test engine model machine and bearing exemplar
Tested.It can be drawn more than, by test method, test-bed is built, the model machine and bearing sample of the engine of experiment
Part determine, it is necessary to cycle it is very long, and need cost it is not small, therefore, in engine development process, pass through power credit
Analysis method analyzes the performance of bearing, can both shorten the construction cycle, saves production cost again, and can be verified in the short time multiple
The design of bearing.
Problem to be solved by this invention is to provide a kind of new bearing computational methods.
The content of the invention
It is an object of the invention to provide one kind on automobile engine bearings dynamic analysis method.
The object of the present invention is achieved like this, establishes the FEM model of engine, establishes the finite element of bearing bush
Model, the material properties of input model, then carry out FEM model modal reduction method；Determine that engine and link assembly are related
Parameter, connecting rods power model is established with Excite Power Unit modules.Mesh generation is carried out to connecting rod geometrical model,
And model reduction is carried out, input corresponding cylinder under every speed and buckle line, utilize the special EHD modules of engine bearing, input
The performance parameter of bearing, the bearing fruiting characteristic of bearing specific operation is calculated；The bearing performance calculation formula is as follows：
。
In formula：For oil film pressure；Machine oil dynamic viscosity；For machine oil filling rate；For journal surface axial velocity.
It is an advantage of the invention that：After method using the analysis engine bearing of the present invention, it can be deduced that some oil film characteristics, example
Such as minimum oil film thickness, maximum oil film pressure result, thus can efficiently accurate evaluation engine bearing performance parameter.
Brief description of the drawings
Fig. 1 is the flow chart of the engine bearing dynamic analysis method of the present invention；
Fig. 2 is the analysis model schematic diagram of the connecting rod engine bearing system dynamics analysis method of the present invention；
The present invention is described in further detail by example below in conjunction with accompanying drawing, but following examples be only the present invention its
In example, do not represent the right protection scope that is limited of the present invention, the scope of the present invention will with right
Book is asked to be defined.
Embodiment
Example 1
The FEM model of engine is established, establishes the FEM model of bearing bush, the material properties of input model, Ran Houjin
Row FEM model modal reduction method；Engine and link assembly relevant parameter are determined, with Excite Power Unit modules
Establish connecting rods power model.Mesh generation is carried out to connecting rod geometrical model, and carries out model reduction, it is right under every speed to input
The cylinder answered is buckled line, using the special EHD modules of engine bearing, the performance parameter of input shaft bearing, it is specific that bearing is calculated
The bearing fruiting characteristic of operating mode.
The above-mentioned EHD bearing modules being previously mentioned, it is the extension Reynolds Reynolds sides based on film elastic hydrodynamic lubrication
Formula 1, it is contemplated that the extrusion effect of the dynamic pressure effect of glide direction, flex effect and entirety.Therefore, can be to the lubrication shape of bearing
State carries out accurate calculate and analyzed, and can make accurate evaluation to the characteristic of bearing film.
(1)
In formula：For oil film pressure；Machine oil dynamic viscosity；For machine oil filling rate；For journal surface axial velocity.
Referring to Fig. 1, the present invention provides a kind of dynamic (dynamical) analysis method of accurate engine bearing, mainly including following step
Suddenly：
Engine and link assembly correlation three-dimensional data are determined, counts engine structure information such as stroke, cylinder number, firing information
Deng, and the relevant information of the parts such as linkage parts connecting rod, bearing shell, piston boss；Utilize Excite Power Unit
Module chooses bearing EHD special modules, establishes engine bearing dynamic analysis model, the schematic diagram of reference picture 2 builds power
Learn analysis model.
In dynamic analysis model, engine is using Generic Body modules come simulated engine model, input hair
Model after motivation FEM model modal reduction method, engine mockup are used as elastomer in kinetic model, so can be more
The boundary condition of accurate simulation engine bearing；Piston Model is simulated using GuidLine modules；Piston pin uses
Piston Pin modules are simulated；Thrust bearing is simulated using ThrustBearing modules；Crankshaft crank neck uses
BearingPin is simulated；Consider oil film pressure analysis（EHD）, sliding axle is used for the crank web of connecting rod bearing shell and bent axle
EHD modules are held, similarly, the auxiliary connection of big end also uses sliding bearing EHD modules；Connecting rod carries out mould using Conrod modules
Intend.
Mesh generation is carried out with bearing bush model data to engine mockup and reduced, by the engine after reduction
Dynamics module .exb dynamics files, and cylinder pressure of engines curve is inputted, and input detailed sliding bearing EHD number of modules
According to progress dynamics simulation.From simulation result, the results such as the oil film to the bearing under specific operation, machine oil are drawn.For hair
The result of motivation bearing is evaluated, and is such as unsatisfactory for requiring, it is necessary to enter engine shaft holder structure, the structure of bearing shell and parameter
Row optimization, then re-start analysis.
Claims (1)
1. one kind comprises the following steps on automobile engine bearings dynamic analysis method, its feature：That establishes engine has
Meta-model is limited, the FEM model of bearing bush is established, the material properties of input model, then carries out FEM model mode contracting
Subtract；Engine and link assembly relevant parameter are determined, connecting rods power mould is established with Excite Power Unit modules
Type;Mesh generation is carried out to connecting rod geometrical model, and carries out model reduction, corresponding cylinder under every speed is inputted and buckles line, profit
With the special EHD modules of engine bearing, the performance parameter of input shaft bearing, the bearing result that bearing specific operation is calculated is special
Property；
The bearing performance calculation formula is as follows：
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045972.2A CN107665286A (en) | 2017-10-31 | 2017-10-31 | One kind is on automobile engine bearings dynamic analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045972.2A CN107665286A (en) | 2017-10-31 | 2017-10-31 | One kind is on automobile engine bearings dynamic analysis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107665286A true CN107665286A (en) | 2018-02-06 |
Family
ID=61144919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711045972.2A Withdrawn CN107665286A (en) | 2017-10-31 | 2017-10-31 | One kind is on automobile engine bearings dynamic analysis method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107665286A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112580242A (en) * | 2020-12-17 | 2021-03-30 | 东风汽车集团有限公司 | Method and device for correcting wear profile of engine main bearing |
| CN112668217A (en) * | 2020-12-17 | 2021-04-16 | 东风汽车集团有限公司 | Analysis method and device for main bearing hydrodynamic lubrication based on designed profile |
| CN113468666A (en) * | 2021-07-08 | 2021-10-01 | 义乌吉利动力总成有限公司 | Engine crankshaft bearing bush noise identification method, device, equipment and storage medium |
| CN114491863A (en) * | 2022-01-30 | 2022-05-13 | 重庆长安汽车股份有限公司 | Reliability simulation analysis method for threaded connection pair of main bearing seat of engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020014121A (en) * | 2000-08-16 | 2002-02-25 | 류정열 | Dynamic stress Analytic Method of vehicles based on Flexible Body Dynamic Simulation |
| JP2007179456A (en) * | 2005-12-28 | 2007-07-12 | Toyota Central Res & Dev Lab Inc | Design device and method for mechanism construct |
| CN104091022A (en) * | 2014-07-11 | 2014-10-08 | 北京工业大学 | Fluid-solid coupling simulation analysis method for static pressure main shaft system under working condition of velocity slip |
| CN104102778A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Crankshaft kinetic analysis method |
| CN104102786A (en) * | 2014-07-23 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Crankshaft three-dimensional kinetic analysis method efficient and quick in optimization |
-
2017
- 2017-10-31 CN CN201711045972.2A patent/CN107665286A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020014121A (en) * | 2000-08-16 | 2002-02-25 | 류정열 | Dynamic stress Analytic Method of vehicles based on Flexible Body Dynamic Simulation |
| JP2007179456A (en) * | 2005-12-28 | 2007-07-12 | Toyota Central Res & Dev Lab Inc | Design device and method for mechanism construct |
| CN104091022A (en) * | 2014-07-11 | 2014-10-08 | 北京工业大学 | Fluid-solid coupling simulation analysis method for static pressure main shaft system under working condition of velocity slip |
| CN104102778A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Crankshaft kinetic analysis method |
| CN104102786A (en) * | 2014-07-23 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Crankshaft three-dimensional kinetic analysis method efficient and quick in optimization |
Non-Patent Citations (4)
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| 张超: "连杆复圆度对连杆轴承弹性流体动力润滑特性的影响研究", 中国优秀硕士学位论文全文数据库, pages 3 - 4 * |
| 邱宇;许敏;李冕;: "基于多体动力学的发动机主轴承润滑特性Kriging建模", 机械设计与研究, no. 03 * |
| 郭媛;崔志琴;吴迪;徐海龙;李学民;: "考虑流体动力润滑的曲轴轴心轨迹计算", 河北农机, no. 11 * |
| 韦战立;酒建刚;杨卫平;陈洪涛;杨广军;禹朝帅;吴蒙;: "柴油机主轴承盖结构分析研究", 拖拉机与农用运输车, no. 05 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112580242A (en) * | 2020-12-17 | 2021-03-30 | 东风汽车集团有限公司 | Method and device for correcting wear profile of engine main bearing |
| CN112668217A (en) * | 2020-12-17 | 2021-04-16 | 东风汽车集团有限公司 | Analysis method and device for main bearing hydrodynamic lubrication based on designed profile |
| CN113468666A (en) * | 2021-07-08 | 2021-10-01 | 义乌吉利动力总成有限公司 | Engine crankshaft bearing bush noise identification method, device, equipment and storage medium |
| CN114491863A (en) * | 2022-01-30 | 2022-05-13 | 重庆长安汽车股份有限公司 | Reliability simulation analysis method for threaded connection pair of main bearing seat of engine |
| CN114491863B (en) * | 2022-01-30 | 2024-07-23 | 重庆长安汽车股份有限公司 | Threaded connection pair reliability simulation analysis method for main bearing seat of engine |
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Application publication date: 20180206 |
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