CN108920738A - Automobile front door stiffness analysis method and system - Google Patents
Automobile front door stiffness analysis method and system Download PDFInfo
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- CN108920738A CN108920738A CN201810379413.3A CN201810379413A CN108920738A CN 108920738 A CN108920738 A CN 108920738A CN 201810379413 A CN201810379413 A CN 201810379413A CN 108920738 A CN108920738 A CN 108920738A
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- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G06F2119/06—Power analysis or power optimisation
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Abstract
The invention discloses a kind of automobile front door stiffness analysis method and system, the method includes：Obtain the CAD model data of automobile front door；The CAD model data are transmitted in CAE pre-processing software, and carry out grid dividing in the CAE pre-processing software, to establish the finite element model of the automobile front door；The finite element model is imported in CAE the poster processing soft and carries out model analysis, obtains calculated result；The displacement data at stress is obtained according to the calculated result；Rigidity value is calculated according to the displacement data.The present invention by CAE analysis technology product development early period can the rigidity to automobile front door effectively analyzed, shutdown abnormal sound occurs for the front door after preventing later period volume production, closes the problems such as not tight, avoids design defect, and reduction development cost shortens the development cycle.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to a kind of automobile front door stiffness analysis method and system.
Background technique
With economy and auto industry rapid development and, the living standard of the people is quickly improved, automobile gradually at
For the trip walking-replacing tool of average family.
Automobile front door is one of important component of automobile, vibration of the rigidity property of automobile front door to vehicle, mode
Frequency distribution has important influence, if automobile front door rigidity goes wrong, front door when will lead to later period volume production is closed the door
Abnormal sound closes the problems such as not tight, and therefore, automobile front door rigidity is the important investigation item of structural analysis and design in new product development.
In the prior art, the stiffness analysis of automobile front door needs to put into a large amount of man power and material, and the development cycle is long, cost
Height constrains the exploitation of automobile.
Summary of the invention
For this purpose, an object of the present invention is to provide a kind of automobile front door stiffness analysis methods, to solve the prior art
It is at high cost, the problem of development cycle length.
The automobile front door stiffness analysis method provided according to the present invention, including：
Obtain the CAD model data of automobile front door；
The CAD model data are transmitted in CAE pre-processing software, and carry out net in the CAE pre-processing software
Lattice divide, to establish the finite element model of the automobile front door；
The finite element model is imported in CAE the poster processing soft and carries out model analysis, obtains calculated result；
The displacement data at stress is obtained according to the calculated result；
Rigidity value is calculated according to the displacement data.
The automobile front door stiffness analysis method provided according to the present invention obtains the CAD model data of automobile front door, so first
Afterwards by CAE pre-processing software, the finite element model of automobile front door is established, then imports and carries out mode point in CAE the poster processing soft
Analysis, can obtain the displacement data from stress from calculated result, and then can calculate rigidity value according to displacement data, to make
Developer can judge whether to need to rectify and improve front door according to the rigidity value being calculated, and this method passes through CAE analysis
Technology product development early period can the rigidity to automobile front door effectively analyzed, the front door after preventing later period volume production is closed
Door abnormal sound, closes the problems such as not tight, avoids design defect, reduces development cost, shortens the development cycle.
In addition, above-mentioned automobile front door stiffness analysis method according to the present invention, can also have following additional technology special
Sign：
Further, described that the CAD model data are transmitted in CAE pre-processing software, and handled before the CAE
Grid dividing is carried out in software, the step of finite element model to establish the automobile front door includes：
The material of each components and respective is set in the automobile front door according to the practical structures of the automobile front door
Connection relationship, while the interval range of the frequency to be investigated is set, the CAE pre-processing software is HyperMesh.
Further, described that the finite element model is imported into CAE the poster processing soft the step of carrying out model analysis packet
It includes：
The freedom degree in the automobile front door at door lock is constrained, the freedom degree of door hinge in the automobile front door is constrained, it is right
In the automobile front door at front door window frame apply vertical sash the default power being greater than, in the CAE the poster processing soft into
Row model analysis.
Further, described that the CAD model data are transmitted in CAE pre-processing software, and handled before the CAE
Grid dividing is carried out in software, the step of finite element model to establish the automobile front door in, solder joint is carried out with CWELD model
Simulation, bolt are simulated with RBE2 model.
Further, the method also includes：
Judge whether the rigidity value is more than rigidity threshold value；
If the rigidity value is less than the rigidity threshold value, the test result of insufficient rigidity at the stress is exported, with right
Reinforced at the stress；
If the rigidity value is greater than the rigidity threshold value, the difference of the rigidity value Yu the rigidity threshold value is further judged
Whether value is more than preset difference value；
If the difference of the rigidity value and the rigidity threshold value is more than the preset difference value, export rigid at the stress
Surplus test result is spent, to progress loss of weight optimization at the stress.
It is another object of the present invention to propose a kind of automobile front door stiffness analysis system, to solve prior art cost
Height, the problem of development cycle length.
The automobile front door stiffness analysis system provided according to the present invention, including：
First obtains module, for obtaining the CAD model data of automobile front door；
Module is established, for the CAD model data to be transmitted in CAE pre-processing software, and is handled before the CAE
Grid dividing is carried out in software, to establish the finite element model of the automobile front door；
First computing module carries out model analysis for importing the finite element model in CAE the poster processing soft, obtains
Calculated result；
Second obtains module, for obtaining the displacement data at stress according to the calculated result；
Second computing module, for calculating rigidity value according to the displacement data.
The automobile front door stiffness analysis system provided according to the present invention obtains module by first first and obtains automobile front door
CAD model data, by CAE pre-processing software, establish the finite element model of automobile front door then in establishing module, then
It is imported in CAE the poster processing soft by the first computing module and carries out model analysis, second obtains module can be from calculated result
The displacement data at stress is obtained, the second last computing module can calculate rigidity value according to displacement data, to make to develop
Personnel can judge whether to need to rectify and improve front door according to the rigidity value being calculated, and this method passes through CAE analysis technology
Product development early period can the rigidity to automobile front door effectively analyzed, the front door after preventing later period volume production occurs to close the door different
It rings, closes the problems such as not tight, avoid design defect, reduce development cost, shorten the development cycle.
In addition, above-mentioned automobile front door stiffness analysis system according to the present invention, can also have following additional technology special
Sign：
Further, the module of establishing is also used to：
The material of each components and respective is set in the automobile front door according to the practical structures of the automobile front door
Connection relationship, while the interval range of the frequency to be investigated is set, the CAE pre-processing software is HyperMesh.
Further, first computing module is also used to：
The freedom degree in the automobile front door at door lock is constrained, the freedom degree of door hinge in the automobile front door is constrained, it is right
In the automobile front door at front door window frame apply vertical sash the default power being greater than, in the CAE the poster processing soft into
Row model analysis.
Further, described to establish solder joint in module and simulated with CWELD model, bolt carries out mould with RBE2 model
It is quasi-.
Further, the system also includes：
First judgment module, for judging whether the rigidity value is more than rigidity threshold value；
First output module exports at the stress rigidity not if being less than the rigidity threshold value for the rigidity value
The test result of foot, with to reinforcing at the stress；
Second judgment module further judges the rigidity value if being greater than the rigidity threshold value for the rigidity value
Whether the difference with the rigidity threshold value is more than preset difference value；
Second output module, if being more than the preset difference value for the difference of the rigidity value and the rigidity threshold value,
The test result of the rigidity surplus at the stress is exported, to progress loss of weight optimization at the stress.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or embodiment through the invention is recognized.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the embodiment of the present invention are from the description of the embodiment in conjunction with the following figures
It will be apparent and be readily appreciated that, wherein：
Fig. 1 is the flow chart of automobile front door stiffness analysis method according to a first embodiment of the present invention；
Fig. 2 be the freedom degree of certain automobile front door in automobile front door stiffness analysis method according to a first embodiment of the present invention about
Beam schematic diagram；
Fig. 3 is the structural block diagram of automobile front door stiffness analysis system according to a second embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the automobile front door stiffness analysis method that first embodiment of the invention proposes, includes the following steps：
S101 obtains the CAD model data of automobile front door；
The CAD model data are transmitted in CAE pre-processing software by S102, and in the CAE pre-processing software into
Row grid dividing, to establish the finite element model of the automobile front door；
Wherein, the CAE pre-processing software is HyperMesh, in the step, needs the reality according to the automobile front door
The material of each components and respective connection relationship in automobile front door described in configuration settings, while the frequency to be investigated is set
The interval range of rate.In modeling process, solder joint is simulated with CWELD model, and bolt is simulated with RBE2 model.
The finite element model is imported in CAE the poster processing soft and carries out model analysis, obtains calculated result by S103；
Wherein, in the step, freedom degree in the automobile front door that needs restraint at door lock is constrained in the automobile front door
The freedom degree of door hinge, to the default power being greater than for applying vertical sash at front door window frame in the automobile front door, described
Model analysis is carried out in CAE the poster processing soft.For example, being loaded by the way of Fig. 2,123 freedom degrees at door lock are constrained
(wherein, 1 representing X transverse direction, 2 represent the longitudinal direction Y, and 3 to represent Z vertical), 123456 freedom degrees for constraining door hinge (wherein, 1 represent
X is lateral, and 2 represent the longitudinal direction Y, and 3 represent that Z is vertical, and 4 represent the longitudinal direction X, and 5 represent Y transverse direction, and 6 represent Z transverse direction), to being applied at front door window frame
Add the 100N power of vertical sash, the CAE the poster processing soft is for example specifically Nastran.
S104 obtains the displacement data at stress according to the calculated result；
S105 calculates rigidity value according to the displacement data.
Specifically, firmly obtaining the rigidity value at stress divided by displacement in displacement data.
In the present embodiment, the method also includes：
Judge whether the rigidity value is more than rigidity threshold value；
If the rigidity value is less than the rigidity threshold value, the test result of insufficient rigidity at the stress is exported, with right
Reinforced at the stress；
If the rigidity value is greater than the rigidity threshold value, the difference of the rigidity value Yu the rigidity threshold value is further judged
Whether value is more than preset difference value；
If the difference of the rigidity value and the rigidity threshold value is more than the preset difference value, export rigid at the stress
Surplus test result is spent, to progress loss of weight optimization at the stress.
According to automobile front door stiffness analysis method provided in this embodiment, the CAD model data of automobile front door are obtained first,
Then by CAE pre-processing software, the finite element model of automobile front door is established, then import and carry out mode in CAE the poster processing soft
Analysis, can obtain the displacement data from stress from calculated result, and then can calculate rigidity value according to displacement data, thus
Developer is set to judge whether to need to rectify and improve front door according to the rigidity value being calculated, this method passes through CAE points
Analysis technology product development early period can the rigidity to automobile front door effectively analyzed, the front door after preventing later period volume production occurs
Shutdown abnormal sound closes the problems such as not tight, avoids design defect, reduces development cost, shortens the development cycle.
Referring to Fig. 3, based on the same inventive concept, the automobile front door stiffness analysis analysis that the second embodiment of the present invention provides
System, including：
First obtains module 10, for obtaining the CAD model data of automobile front door；
Module 20 is established, for the CAD model data to be transmitted in CAE pre-processing software, and before the CAE
Grid dividing is carried out in reason software, to establish the finite element model of the automobile front door；
First computing module 30 carries out model analysis for importing the finite element model in CAE the poster processing soft, obtains
Calculated result out；
Second obtains module 40, for obtaining the displacement data at stress according to the calculated result；
Second computing module 50, for calculating rigidity value according to the displacement data.
In the present embodiment, the module 20 of establishing is also used to：
The material of each components and respective is set in the automobile front door according to the practical structures of the automobile front door
Connection relationship, while the interval range of the frequency to be investigated is set, the CAE pre-processing software is HyperMesh.
In the present embodiment, first computing module 30 is also used to：
The freedom degree in the automobile front door at door lock is constrained, the freedom degree of door hinge in the automobile front door is constrained, it is right
In the automobile front door at front door window frame apply vertical sash the default power being greater than, in the CAE the poster processing soft into
Row model analysis.
In the present embodiment, described to establish solder joint in module 20 and simulated with CWELD model, bolt is carried out with RBE2 model
Simulation.
In the present embodiment, the system also includes：
First judgment module 60, for judging whether the rigidity value is more than rigidity threshold value；
First output module 70 exports rigidity at the stress if being less than the rigidity threshold value for the rigidity value
Insufficient test result, with to reinforcing at the stress；
Second judgment module 80 further judges the rigidity if being greater than the rigidity threshold value for the rigidity value
Whether the difference of value and the rigidity threshold value is more than preset difference value；
Second output module 90, if being more than the preset difference value for the difference of the rigidity value and the rigidity threshold value,
The test result of the rigidity surplus at the stress is exported, then to reduce cost to loss of weight optimization is carried out at the stress.
The automobile front door stiffness analysis system provided according to the present invention obtains module by first first and obtains automobile front door
CAD model data, by CAE pre-processing software, establish the finite element model of automobile front door then in establishing module, then
It is imported in CAE the poster processing soft by the first computing module and carries out model analysis, second obtains module can be from calculated result
The displacement data at stress is obtained, the second last computing module can calculate rigidity value according to displacement data, to make to develop
Personnel can judge whether to need to rectify and improve front door according to the rigidity value being calculated, and this method passes through CAE analysis technology
Product development early period can the rigidity to automobile front door effectively analyzed, the front door after preventing later period volume production occurs to close the door different
It rings, closes the problems such as not tight, avoid design defect, reduce development cost, shorten the development cycle.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized：With for realizing the logic gates of logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of automobile front door stiffness analysis method, which is characterized in that including：
Obtain the CAD model data of automobile front door；
The CAD model data are transmitted in CAE pre-processing software, and carries out grid in the CAE pre-processing software and draws
Point, to establish the finite element model of the automobile front door；
The finite element model is imported in CAE the poster processing soft and carries out model analysis, obtains calculated result；
The displacement data at stress is obtained according to the calculated result；
Rigidity value is calculated according to the displacement data.
2. automobile front door stiffness analysis method according to claim 1, which is characterized in that described by the CAD model number
According to being transmitted in CAE pre-processing software, and grid dividing is carried out in the CAE pre-processing software, before establishing the automobile
Door finite element model the step of include：
The material of each components and respective connection in the automobile front door are set according to the practical structures of the automobile front door
Relationship, while the interval range of the frequency to be investigated is set, the CAE pre-processing software is HyperMesh.
3. automobile front door stiffness analysis method according to claim 1, which is characterized in that described by the finite element model
Importing in CAE the poster processing soft the step of carrying out model analysis includes：
The freedom degree in the automobile front door at door lock is constrained, the freedom degree of door hinge in the automobile front door is constrained, to described
Apply the default power being greater than of vertical sash in automobile front door at front door window frame, to carry out mould in the CAE the poster processing soft
State analysis.
4. automobile front door stiffness analysis method according to claim 1, which is characterized in that described by the CAD model number
According to being transmitted in CAE pre-processing software, and grid dividing is carried out in the CAE pre-processing software, before establishing the automobile
In the step of finite element model of door, solder joint is simulated with CWELD model, and bolt is simulated with RBE2 model.
5. automobile front door stiffness analysis method according to claim 1, which is characterized in that the method also includes：
Judge whether the rigidity value is more than rigidity threshold value；
If the rigidity value is less than the rigidity threshold value, the test result of insufficient rigidity at the stress is exported, to described
Reinforced at stress；
If the rigidity value is greater than the rigidity threshold value, further judges the rigidity value and the difference of the rigidity threshold value is
No is more than preset difference value；
If the difference of the rigidity value and the rigidity threshold value is more than the preset difference value, the rigidity mistake at the stress is exported
Surplus test result, to progress loss of weight optimization at the stress.
6. a kind of automobile front door stiffness analysis system, which is characterized in that including：
First obtains module, for obtaining the CAD model data of automobile front door；
Module is established, for the CAD model data to be transmitted in CAE pre-processing software, and in the CAE pre-processing software
Middle carry out grid dividing, to establish the finite element model of the automobile front door；
First computing module carries out model analysis for importing the finite element model in CAE the poster processing soft, obtains calculating
As a result；
Second obtains module, for obtaining the displacement data at stress according to the calculated result；
Second computing module, for calculating rigidity value according to the displacement data.
7. automobile front door stiffness analysis system according to claim 6, which is characterized in that the module of establishing is also used to：
The material of each components and respective connection in the automobile front door are set according to the practical structures of the automobile front door
Relationship, while the interval range of the frequency to be investigated is set, the CAE pre-processing software is HyperMesh.
8. automobile front door stiffness analysis system according to claim 6, which is characterized in that first computing module is also used
In：
The freedom degree in the automobile front door at door lock is constrained, the freedom degree of door hinge in the automobile front door is constrained, to described
Apply the default power being greater than of vertical sash in automobile front door at front door window frame, to carry out mould in the CAE the poster processing soft
State analysis.
9. automobile front door stiffness analysis system according to claim 6, which is characterized in that described to establish solder joint use in module
CWELD model is simulated, and bolt is simulated with RBE2 model.
10. automobile front door stiffness analysis system according to claim 6, which is characterized in that the system also includes：
First judgment module, for judging whether the rigidity value is more than rigidity threshold value；
First output module exports insufficient rigidity at the stress if being less than the rigidity threshold value for the rigidity value
Test result, with to reinforcing at the stress；
Second judgment module further judges the rigidity value and institute if being greater than the rigidity threshold value for the rigidity value
Whether the difference for stating rigidity threshold value is more than preset difference value；
Second output module exports if being more than the preset difference value for the difference of the rigidity value and the rigidity threshold value
The test result of rigidity surplus at the stress, to progress loss of weight optimization at the stress.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112347686A (en) * | 2020-11-30 | 2021-02-09 | 中国运载火箭技术研究院 | Bolt checking method for instrument mounting structure |
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| CN101916322A (en) * | 2010-09-07 | 2010-12-15 | 上海奕代汽车技术有限公司 | Optimization design method for sagging problem of car door based on CAE (Computer Aided Engineering) structural analysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112347686A (en) * | 2020-11-30 | 2021-02-09 | 中国运载火箭技术研究院 | Bolt checking method for instrument mounting structure |
| CN112347686B (en) * | 2020-11-30 | 2024-03-26 | 中国运载火箭技术研究院 | Bolt checking method of instrument mounting structure |
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Application publication date: 20181130 |