CN105260577A - Macpherson suspension modeling method - Google Patents
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- CN105260577A CN105260577A CN201510810170.0A CN201510810170A CN105260577A CN 105260577 A CN105260577 A CN 105260577A CN 201510810170 A CN201510810170 A CN 201510810170A CN 105260577 A CN105260577 A CN 105260577A
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- 239000000725 suspension Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000012805 post-processing Methods 0.000 claims abstract description 6
- 230000009191 jumping Effects 0.000 claims abstract description 4
- 230000036316 preload Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 12
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of CAE analysis and particularly relates to a macpherson suspension modeling method. The macpherson suspension modeling method comprises the following steps that firstly, a suspension preloading model is established according to hard point coordinates and characteristic parameters of a bush, a spherical hinge, a spring and a damper limiting block, and a topological relation of a suspension finite element model is defined; secondly, according to common braking, turning and vertical jumping working conditions, working condition types and loads corresponding to the working condition types are configured, and load working conditions capable of being used for calculation are output according to configuration; thirdly, after calculation of the load working conditions is completed, a calculation result is subjected to postprocessing operation, and then stress of a bush unit and stress of a constrained point are output. By means of the method, a cycle can be shortened by a half compared with that of conventional suspension finite element modeling, the modeling efficiency is greatly improved, fast modeling can be achieved, concerned hard point loads can be conveniently output, and pertinence and convenience of analysis are improved.
Description
Technical field
The invention belongs to cae analysis technical field, particularly a kind of McPherson suspension modeling method.
Background technology
Cae analysis plays important design guidance effect at the initial stage predevelopment phase of project, and the digital sample car stage in early days exposes design risk, and carries out Optimal improvements, reduces the automobile research cycle, solves the improving cost problem in real vehicle later stage.In order to improve the analysis efficiency of CAE, the modeling method of finite element model is very important, conventional suspension finite element model modeling needs the attributes such as hard spot coordinate, lining, coordinate system, mother metal, spring, vibration damper input successively in pre-processing software and debug, and the modeling time occupies the very large proportion of whole analytical cycle.
Summary of the invention
The object of the present invention is to provide a kind of McPherson suspension modeling method can setting up McPherson suspension finite element model fast, improve analysis efficiency.
For realizing above object, the technical solution used in the present invention is: a kind of McPherson suspension modeling method, comprise the steps: that (A) sets up suspension according to the characterisitic parameter of hard spot coordinate and lining, ball pivot, spring, vibroshock limited block and preload model, define the topological relation of suspension finite element model; (B) according to common braking, turning, jumping operating mode of hanging down, operating mode type and its corresponding magnitude of load are configured, then export the load working condition that may be used for calculating according to configuration; (C) after load working condition calculates, post-processing operation is carried out to result of calculation, then export the stressed of the stressed and obligatory point of lining unit.
Compared with prior art, there is following technique effect in the present invention: can carry out rapid modeling to McPherson suspension finite element model, the cycle of 50% is reduced than conventional suspension finite element modeling, substantially increase modeling efficiency, simultaneously can rapid modeling export the hard spot load of concern easily, improve specific aim and the convenience of analysis; Based on the secondary development of software, there is not Cost Problems, thinking is novel, and module frame design is succinctly ingenious, by force functional.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
ABAQUS is the popular software of non linear finite element analysis, in automobile industry extensive application.Python is a kind of OO computer assembly language, contain one group to improve and the java standard library of easy understand, language is mature and stable, can easily realize a lot of function, each analysis module in ABAQUS is all developed based under Python environment, consider based on this, by Python environment newly-increased McPherson suspension MBM in ABAQUS.
Newly-increased module is divided into three parts, Part I is " set up suspension and preload model (Preload) ", Part II is " export and analyze operating mode file (Loadcase) ", and Part III is " exporting operating mode hard spot load (LoadOutput) ".Increase the secondary development approach of three parts by means of the GUI of ABAQUS of module newly, newly-built tools interfaces shows in the Plug-ins of ABAQUS toolbar.
Setting up suspension, to preload model be module Part I, and the function of this part sets up the actual physical structure of McPherson suspension, for Part II operating mode file provides carrier.Coordinate figure under tie point (hard spot) car load coordinate system in suspension is provided by designer, and is filled in the hard spot coordinate excel table of specific format, is convenient in ABAQUS, import the extraction that hard spot coordinate excel table carries out relevant hard spot coordinate.In general, the hard spot position of McPherson suspension is the interconnective places of different parts, and this position is connected by lining or ball pivot usually, and such as control arm and subframe are that lining is connected, and track rod and steering knuckle are that ball pivot is connected, etc.Lining and ball pivot mechanics parameters define in advance in INP file (ABAQUS default output format), are convenient to increase newly module window to import from ABAQUS assemble suspension system model.In addition, the characterisitic parameter such as volute spring, vibration damper limited block also needs to define in INP file in advance.The mechanics parameters such as lining are obtained by experimental test, namely the power of lining six direction and the relation (rigidity) of displacement is measured, this six direction needs to be mapped with finite element model, so need to define corresponding lining local coordinate system in finite element model, the foundation of coordinate system is also according to the hard spot coordinate definition in excel table.The foundation of suspension finite element model is in order that calculating subsequently, so need to calculate in load(ing) point and obligatory point with set formal definition good, similar, need the point by paying close attention to good with the formal definition of set when being concerned about some hard spot stressed in FEM post-processing.Newly-increased module Part I define afterwards by McPherson suspension model with INP formatted output.
Exporting and analyzing operating mode file is module Part II, and defined by the topological relation of suspension finite element model in a first portion, this part is the loading condition of Definition Model, and load(ing) point and obligatory point are specified at module Part I.General suspension finite element analysis comprises braking, turning, the operating modes such as jumping of hanging down, these operating mode types and magnitude of load are defined in operating mode excel table, be convenient in ABAQUS, import operating mode excel table and extract load, and then export the load file that may be used for calculating, the file of such as damped condition is called brake.inp, the stressed output order of hard spot is provided with, for checking the stressing conditions of the tie points such as lining in aftertreatment in this operating mode file.Newly-increased module Part II define afterwards by load working condition with INP formatted output, the INP exported with newly-increased module Part I calculates corresponding load working condition jointly.
Exporting operating mode hard spot load is the Part III of module, and the object of this part investigates the stressing conditions of sprung parts tie point, contributes to passing judgment on Finite element analysis results.This part carries out post-processing operation to result of calculation file after load working condition calculating is complete.The type exported has two kinds, a kind of is stressed (CTF) of lining unit, another kind is stressed (RF) of obligatory point, be input in operation interface by needing the stress point set (module Part I defines) exported, can by focus stressed with txt text formatting output to current file folder under, improve the convenience checked.
The modeling that it should be noted that this cover McPherson suspension is all based on one dimension unit, and physical components one dimension rigid element simplifies, and such benefit is: 1, and the McPherson suspension model that one dimension simplifies can rapid modeling export the hard spot load of concern easily; 2, if need to investigate associated components or whole suspension system intensity, corresponding parts or whole suspension system can be replaced, improve specific aim and the convenience of analysis.
Claims (7)
1. a McPherson suspension modeling method, comprises the steps:
(A) set up suspension according to the characterisitic parameter of hard spot coordinate and lining, ball pivot, spring, vibroshock limited block and preload model, the topological relation of definition suspension finite element model;
(B) configure operating mode type and its corresponding magnitude of load according to common braking, turning, jumping operating mode of hanging down, then export the load working condition that may be used for calculating according to configuration;
(C) after load working condition calculates, post-processing operation is carried out to result of calculation, then export the stressed of the stressed and obligatory point of lining unit.
2. McPherson suspension modeling method as claimed in claim 1, is characterized in that: the modeling of McPherson suspension is all based on one dimension unit, and solid element one dimension rigid element simplifies.
3. McPherson suspension modeling method as claimed in claim 1, it is characterized in that: the coordinate figure under the tie point car load coordinate system in suspension is provided by designer and is filled in hard spot coordinate excel form, in ABAQUS software, import the extraction that hard spot coordinate excel table carries out relevant hard spot coordinate.
4. McPherson suspension modeling method as claimed in claim 1, is characterized in that: the characterisitic parameter of described lining obtains as follows:
(S1) power of lining six direction and the relation of displacement is measured;
(S2) to preload in model at suspension according to hard spot coordinate and define corresponding lining local coordinate system;
(S3) six direction in S1 is corresponding with the coordinate system in S2.
5. McPherson suspension modeling method as claimed in claim 1, is characterized in that: in described steps A, also to calculative load(ing) point and obligatory point define with the form of set subsequently.
6. McPherson suspension modeling method as claimed in claim 1, is characterized in that: to when needing to export some hard spot stressed in post-processing operation, these defined with the form of set in step.
7. McPherson suspension modeling method as claimed in claim 1, it is characterized in that: in described step B, set up operating mode excel table, operating mode type and magnitude of load is defined in operating mode excel table, in ABAQUS software, import operating mode excel table extract load, and then export the load working condition that may be used for calculating.
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| CN201510810170.0A CN105260577A (en) | 2015-11-19 | 2015-11-19 | Macpherson suspension modeling method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106503294A (en) * | 2016-09-21 | 2017-03-15 | 奇瑞汽车股份有限公司 | A kind of method for designing of McPherson suspension Splitting Point of Ackerman Steering and device |
| CN106951639A (en) * | 2017-03-21 | 2017-07-14 | 重庆大学 | A kind of non-linear rigidity leaf spring Coupled Rigid-flexible MNF analogy methods |
| CN108376209A (en) * | 2018-05-10 | 2018-08-07 | 北京新能源汽车股份有限公司 | Modeling method and modeling system for shock absorber |
| CN111581871A (en) * | 2020-06-08 | 2020-08-25 | 中国第一汽车股份有限公司 | Modeling method, device, equipment and storage medium |
| CN112100738A (en) * | 2020-08-14 | 2020-12-18 | 中国第一汽车股份有限公司 | Method for calculating and analyzing normal dynamic stiffness of vehicle body metal plate in cloud picture form |
| CN113821959A (en) * | 2021-09-29 | 2021-12-21 | 宜宾凯翼汽车有限公司 | Suspension load decomposition, data processing and finite element load loading method |
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| CN103310047A (en) * | 2013-05-30 | 2013-09-18 | 同济大学 | Optimization method facing lateral force of Macpherson suspension shock absorber |
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| CN103310047A (en) * | 2013-05-30 | 2013-09-18 | 同济大学 | Optimization method facing lateral force of Macpherson suspension shock absorber |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106503294A (en) * | 2016-09-21 | 2017-03-15 | 奇瑞汽车股份有限公司 | A kind of method for designing of McPherson suspension Splitting Point of Ackerman Steering and device |
| CN106951639A (en) * | 2017-03-21 | 2017-07-14 | 重庆大学 | A kind of non-linear rigidity leaf spring Coupled Rigid-flexible MNF analogy methods |
| CN106951639B (en) * | 2017-03-21 | 2020-04-14 | 重庆大学 | Rigidity-flexibility coupling simulation method for nonlinear rigidity steel plate spring |
| CN108376209A (en) * | 2018-05-10 | 2018-08-07 | 北京新能源汽车股份有限公司 | Modeling method and modeling system for shock absorber |
| CN111581871A (en) * | 2020-06-08 | 2020-08-25 | 中国第一汽车股份有限公司 | Modeling method, device, equipment and storage medium |
| CN111581871B (en) * | 2020-06-08 | 2023-06-09 | 中国第一汽车股份有限公司 | Modeling method, modeling device, modeling equipment and storage medium |
| CN112100738A (en) * | 2020-08-14 | 2020-12-18 | 中国第一汽车股份有限公司 | Method for calculating and analyzing normal dynamic stiffness of vehicle body metal plate in cloud picture form |
| CN113821959A (en) * | 2021-09-29 | 2021-12-21 | 宜宾凯翼汽车有限公司 | Suspension load decomposition, data processing and finite element load loading method |
| CN113821959B (en) * | 2021-09-29 | 2024-03-22 | 宜宾凯翼汽车有限公司 | Suspension load decomposition, data processing and finite element load loading method |
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