CN110489889A - Introducing-type structural finite element analysis processing method - Google Patents
Introducing-type structural finite element analysis processing method Download PDFInfo
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- CN110489889A CN110489889A CN201910783914.2A CN201910783914A CN110489889A CN 110489889 A CN110489889 A CN 110489889A CN 201910783914 A CN201910783914 A CN 201910783914A CN 110489889 A CN110489889 A CN 110489889A
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Abstract
The present invention relates to finite element analysis fields, disclose a kind of introducing-type structural finite element analysis processing method, promote the efficiency of finite element analysis.The present invention creates the structural model of object to be analyzed in modeling software, exports geometrical model file using general format, and require creation finite element to control file according to FEM calculation；In finite element software, specified geometrical model file is imported to create geometrical model, it imports finite element and controls file, and press the agreement of " architectural characteristic " data and " operating procedure " data, the incidence relation between creation " geometric element~structure title~operating procedure "；Based on the incidence relation between " geometric element~structure title~operating procedure ", every pre-treatment, solution and post-processing operation are sequentially completed by the requirement of " operating procedure " data.The present invention is suitable for introducing-type structural finite element analysis.
Description
Technical field
The present invention relates to finite element analysis fields, in particular to introducing-type structural finite element analysis processing method.
Background technique
It is compared with professional CAD software, the modeling function of finite element analysis software is slightly weak, to improve FEM calculation modeling effect
Rate generally first creates structural model using professional CAD software, defeated using universal standards formats such as * .iges, * .stp, * .sat afterwards
Model file out, then creates geometrical model using lead-in mode in finite element software, and this modeling method can be referred to as to lead
Enter formula modeling.In the finite element analysis of introducing-type modeling, since universal standard format model only includes geometry topological data, In
In progress pre-treatment, last handling process, to carry out the operations such as grid dividing, constraint application, load application, result output,
Set marshalling need to be carried out to geometric elements such as point, line, surface, bodies, the structure feature according to object to be analyzed be needed, by structure position
Difference, the artificial pickup sum aggregate for carrying out geometric element respectively compiles in collaboration with group, intricate operation, and is easy error, especially for multiple
Miscellaneous space three-dimensional model, seriously affects the efficiency of finite element analysis.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of introducing-type structural finite element analysis processing method, promotion has
The efficiency of finite element analysis.
To solve the above problems, the technical solution adopted by the present invention is that: introducing-type structural finite element analysis processing method, packet
Include following steps:
In modeling software, the structural model of object to be analyzed is created, geometrical model file is exported using general format, and
Creation finite element is required to control file according to FEM calculation, the finite element control file is to record by uniform rules tissue
" architectural characteristic " data and " operating procedure " data, identified for finite element software and geometric element and complete operations step；
In finite element software, specified geometrical model file is imported to create geometrical model, imports finite element control text
Part, and the agreement of " architectural characteristic " data and " operating procedure " data is pressed, creation " geometric element~structure title~operation step
Suddenly the incidence relation between "；
Based on the incidence relation between " geometric element~structure title~operating procedure ", by wanting for " operating procedure " data
It asks and is sequentially completed every pre-treatment, solution and post-processing operation.
Further, finite element control file can be according to " number+element type+structure title+positioning coordinate+material
Number ... " form building " architectural characteristic " data convention and data rule.
Further, finite element control file can construct " operation step according to " number+operating parameter+lumped parameter " form
Suddenly data convention and data rule ".
Further, the specific steps for creating the incidence relation between " geometric element~structure title~operating procedure " can
Include:
" positioning coordinate " data for utilizing each element in " architectural characteristic " data, search the geometric element by the point,
After reading its " element index number ", " element index number " data are added in existing " architectural characteristic " data；Utilize each behaviour
Make " the structure name keys " in step " lumped parameter ", to " architectural characteristic " number of " structure title " entry match query
According to " element index number " sequence of return is added in existing " operating procedure " data.
Further, the operating procedure of finite element, which generally comprises, implements grid dividing, constraint application, load application, view
Definition and result output.
Specifically, the modeling software is generally CAD software.
The beneficial effects of the present invention are: the invention proposes controlled with " architectural characteristic " and finite element " operating procedure " data
The data format and data standard of limited atom operation, and based on this data, according to location finding and keyword matching method,
The technical solution of building " geometric element~structure title~operating procedure " incidence relation is developed, user can be by the technical solution
The corresponding automation module of establishment, synchronous export geometrical model file and finite element control file, are automatically performed each of finite element
Processing operation before and after, reduce or eliminates the manual operation under CAE environment, can greatly improve finite element analysis work effect
Rate.
Detailed description of the invention
Fig. 1 is key step figure of the invention.
Fig. 2 is that structure of the invention performance data constitutes signal.
Specific embodiment
The present invention provides a kind of introducing-type structural finite element analysis processing method, general using the modeling software export of profession
It after geometrical model file basis, while exporting or creating finite element and controlling file, import geometrical model file in finite element software
Afterwards, the secondary development function creation automation module carried using software, the automatic finite element that reads controls file, by architectural characteristic
The agreement of data and operating procedure data is creating between " geometric element~structure title~operating procedure " in CAE software
Incidence relation, the automatic forward and backward processing operation step of items for executing finite element analysis.
It requires individually for " architectural characteristic " data and " operating procedure " data to be output to " finite element control text in the present invention
In part ", so that the FEM calculation of " introducing-type " modeling identifies geometric element and completes operations step.As CAD, CAE are soft
Part or secondary development software support, user can be related to " finite element control file " by " geometrical model file " in CAD software
Information is merged into a data APMB package and is exported, the supplementary data decoder module in CAE software, directly creation geometry mould
Type, or restore temporary file and carry out geometrical model importing, then identify geometric element and complete operations step.
Below by attached drawing, the present invention will be further described.
As shown in Figure 1, the specific steps of the present invention are as follows:
1. " geometrical model file " creates
The structure mould of creation object to be analyzed in the modeling software (below with CAD software in order to be illustrated) of profession
Type, exports geometrical model file using general formats such as * .iges, * .stp, * .sat, uses introduction method for finite element software
Construct geometrical model.
2. " finite element control file " creates
In CAD software, export or creation finite element is required to control file according to FEM calculation, to record by unified
" architectural characteristic " data and " operating procedure " data of regular weaves identify geometric element for finite element software and complete every behaviour
Make step.
1. " architectural characteristic " data are constituted
All kinds of geometric elements such as point, line, surface, body in CAD software can generally be adopted according to the difference of affiliated structure position
Be described by structure essential information with various ways such as title, figure layer or groupings, moreover it is possible to add attribute for describe as material, advise
More additional informations such as lattice press " number+element type+structure title+positioning coordinate+material number ... " mode to above- mentioned information
Combination is " architectural characteristic " data, and structure of the invention performance data constitutes as shown in Figure 2.Wherein, " positioning coordinate " is general right
It should be point, line, surface, the node of body, central point or characteristic point, usually can directly measure and acquire in CAD software.
2. " operating procedure " data are constituted
Before and after FEM calculation in treatment process, implement grid dividing, constraint applies, load application, view definition, achievement
It is specified such as subnetting mode, unit size, load, load direction, constrained type, view position except needing when the operation such as output
It sets, outside the operating parameters such as achievement type, it is also necessary to specified operation object (element or set marshalling), to above- mentioned information according to operating
The difference of type is combined according to " number+operating parameter+lumped parameter " mode as " operating procedure " data, and the present invention is different
Finite element operating procedure data are constituted as shown in table 1- table 5.Wherein, " view definition " step desired view anchor point coordinate,
Measurement can be set according to user in CAD software to acquire；" structure name keys " under " lumped parameter ", should be with " structure spy
Property " " structure title " in data corresponding, it is part of it or whole, allows combined sequence, " lumped parameter " can be by user's list
Solely building can also construct in CAD software with " architectural characteristic " data correlation.
1 grid dividing step tables of data of table
Note: 1, subnetting mode: 0 is free grid, 1 is structured grid；2, control model: 0 is to be by size Control, 1
It is controlled by segments.
2 displacement constraint step tables of data of table
Note: displacement parameter vacancy indicate without: can also be other types of constraint in addition to displacement constraint.
3 load of table applies step tables of data
Note: parameters of loading vacancy indicate without；It can also be other types of load in addition to load, area load.
4 view definition step tables of data of table
5 result output step tables of data of table
Note: output label is the Property Name of the calculating achievements such as stress, displacement, and different software agreement is slightly different.For sky
When do not export corresponding achievement.
3. " introducing-type " geometrical model creates
In finite element software CAE, using software import feature, it is several to create to be automatically imported specified geometrical model file
What model.
4. " structure title~element index number " incidence relation constructs
After CAE software imports finite element control file, " positioning coordinate " number of each element in " architectural characteristic " data is utilized
According to the geometric element by the point being searched using " close " mode, after reading its " element index number ", by " element index number "
Data add in existing " architectural characteristic " data, can construct the pass of " structure title~positioning coordinate~element index number "
Connection relationship.
5. " operating procedure~element index number " incidence relation constructs
After CAE software imports finite element control file, " the structure title key in each operating procedure " lumped parameter " is utilized
Word " uses " architectural characteristic " data of "comprising" mode match query to " structure title " entry, by " the element index of return
Number " sequence adds in existing " operating procedure " data, " operating procedure~name keys~element index can be constructed
Number " incidence relation.
" 6. front and back processing automation " Development of Module method
According to step " 1,2 " to the relevant contract of model, data organization, the same of geometrical model can be constructed in CAD model
When, creation finite element control data are supplemented using modes such as table, attributes, then use secondary development mode synchronism output geometry
Model file and finite element control file.
According to step " 3,4,5 " the relevant technologies implementation strategy, automation module can be called after finite element software starting, from
It is dynamic to import geometrical model, read control file data, according to " architectural characteristic " and " operating procedure " data, by location finding with
Keyword matching method constructs the incidence relation between " geometric element~structure title~operating procedure ", to be based on " geometry
Incidence relation between element~structure title~operating procedure ", before being sequentially completed items by the requirement of " operating procedure " data
Processing, solution and post-processing operation.
The foregoing describe basic principle of the invention and main feature, the description of specification only illustrates original of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (6)
1. introducing-type structural finite element analysis processing method, which comprises the steps of:
In modeling software, the structural model of object to be analyzed is created, using general format output geometrical model file, and according to
FEM calculation requires creation finite element to control file, and the finite element control file is to record by uniform rules tissue
" architectural characteristic " data and " operating procedure " data identify geometric element for finite element software and complete operations step；
In finite element software, specified geometrical model file is imported to create geometrical model, is imported finite element and is controlled file, and
By the agreement of " architectural characteristic " data and " operating procedure " data, create between " geometric element~structure title~operating procedure "
Incidence relation；
Based on the incidence relation between " geometric element~structure title~operating procedure ", by " operating procedure " data requirement according to
The every pre-treatment of secondary completion, solution and post-processing operation.
2. introducing-type structural finite element analysis processing method as described in claim 1, which is characterized in that finite element controls file
According to " number+element type+structure title+positioning coordinate+material number ... " form building " architectural characteristic " data convention and
Data rule.
3. introducing-type structural finite element analysis processing method as described in claim 1, which is characterized in that finite element controls file
According to the data convention and data rule of " number+operating parameter+lumped parameter " form building " operating procedure ".
4. introducing-type structural finite element analysis processing method as described in claim 1, which is characterized in that creation " geometric element
The specific steps of incidence relation between~structure title~operating procedure " include:
" positioning coordinate " data for utilizing each element in " architectural characteristic " data, search the geometric element by the point, read
After its " element index number ", " element index number " data are added in existing " architectural characteristic " data；It is walked using each operation
Suddenly " the structure name keys " in " lumped parameter " will to " architectural characteristic " data of " structure title " entry match query
" element index number " sequence returned adds in existing " operating procedure " data.
5. introducing-type structural finite element analysis processing method as described in claim 1, which is characterized in that the operation of finite element walks
It suddenly include implementing grid dividing, constraint application, load application, view definition and result output.
6. introducing-type structural finite element analysis processing method as described in claim 1, which is characterized in that the modeling software is
CAD software.
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| CN102855359A (en) * | 2012-09-11 | 2013-01-02 | 北京航空航天大学 | Optimized design method for variable-thickness rims of automobile wheels |
| CN103425844A (en) * | 2013-08-20 | 2013-12-04 | 天津大学 | CAD/CAE (Computer-Aided Design/Computer-Aided Education) system based on data current communication platform and integration method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040122630A1 (en) * | 2002-12-19 | 2004-06-24 | Wallace Ronald Hugh Fife | Method and apparatus for linking finite element models to computer-aided design models |
| CN101923467A (en) * | 2010-08-13 | 2010-12-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for model transmission among CAD (Computer-Aided Design) software, UG (Unigraphics) software and CAE (Computer-Aided Engineering) software |
| 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 |
| CN102855359A (en) * | 2012-09-11 | 2013-01-02 | 北京航空航天大学 | Optimized design method for variable-thickness rims of automobile wheels |
| CN103425844A (en) * | 2013-08-20 | 2013-12-04 | 天津大学 | CAD/CAE (Computer-Aided Design/Computer-Aided Education) system based on data current communication platform and integration method |
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Application publication date: 20191122 |