CN107301287A - The method for automatically extracting vehicle body attachment point dynamic stiffness - Google Patents
The method for automatically extracting vehicle body attachment point dynamic stiffness Download PDFInfo
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- CN107301287A CN107301287A CN201710463204.2A CN201710463204A CN107301287A CN 107301287 A CN107301287 A CN 107301287A CN 201710463204 A CN201710463204 A CN 201710463204A CN 107301287 A CN107301287 A CN 107301287A
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Abstract
The invention discloses a kind of method for automatically extracting vehicle body attachment point dynamic stiffness, the analysis calculation procedure of vehicle body attachment point dynamic stiffness is automatically extracted well with Tcl/Tk programming languages, and be integrated in CAE analysis the poster processing soft Hypergraph second development interface；White body geometrical model is set up under vehicle coordinate system in CATIA softwares；White body geometrical model is imported into CAE analysis pre-processing software Hypermesh；Mesh generation, material parameter and attribute is carried out to white body geometrical model to assign, connect foundation, the setting of dynamic stiffness load working condition；Solution calculating is carried out with the Optistruct solvers of Hypermesh softwares and obtains destination file；In CAE analysis the poster processing soft Hypergraph, the program of Tcl/Tk programming languages is called, according to prompting selection dynamic stiffness module, destination file is imported；Define and import a series of Define files of the vehicle body attachment point dynamic stiffness to be extracted；Program can automatically process the dynamic stiffness curve for obtaining all vehicle body attachment points.The present invention can solve existing processing inconvenience by hand, and efficiency is low, and error rate it is high the problem of.
Description
Technical field
The present invention relates to automobile CAE software technical field, vehicle body attachment crawl is automatically extracted more specifically to one kind
The method of rigidity.
Background technology
Emphasis control index when connection stiffness is vehicle body design, the calculating of current connection stiffness is mainly cut by three
The centre of form intersection point in face as interception nodal analysis method border reference point, and by the empirical value pair in the numerical value and database of calculating
Than, and then assess the height of connection stiffness.There are two deficiencies in this method:One be the node centre of form be space point, it is different
The node centre of form intersection point that engineer finds can there is any discrepancy, and two be empirical value in database to the scope definition of connection stiffness excessively
Extensively, the reference significance for being related to specific vehicle is little.
White body is being carried out when CAE calculates analysis, it is necessary to carry using finite element software Hypermesh and Hypergraph
The dynamic stiffness curve data of pick-up body attachment point, and the CAE software Hypergraph softwares of existing latest edition be merely able to by
Step manual operations, not only efficiency is low, takes long, and error rate is high.
The content of the invention
The technical problem to be solved in the present invention is there is provided a kind of method for automatically extracting vehicle body attachment point dynamic stiffness, with
Solve existing craft can only step-by-step operation, efficiency is low, take it is long, and error rate it is high the problem of.
The technical solution adopted for the present invention to solve the technical problems is：It is firm that construction one kind automatically extracts vehicle body attachment crawl
The method of degree, comprises the following steps：
S1, with the good analysis calculation procedure for automatically extracting vehicle body attachment point dynamic stiffness of Tcl/Tk programming languages, and
In the second development interface for being integrated in CAE analysis the poster processing soft Hypergraph；
S2, white body geometrical model is set up under vehicle coordinate system in CATIA softwares；
S3, white body geometrical model imported into CAE analysis pre-processing software Hypermesh；
S4, carry out that mesh generation, material parameter and attribute are assigned, connection is set up, dynamic stiffness is carried to white body geometrical model
Lotus operating mode is set；
S5, the Optistruct solvers carried with Hypermesh softwares are calculated, and solution obtains destination file；
S6, in CAE analysis the poster processing soft Hypergraph, call the program of Tcl/Tk programming languages, according to
Prompting selection dynamic stiffness module, importing destination file；
S7, the node serial number and the corresponding relation of title that a series of vehicle body attachment points to be extracted are defined with notepad, it is raw
Into Define files；
S8, the defined good Define files of importing, and operation program；
S9, program can automatically process the dynamic stiffness curve for obtaining all vehicle body attachment points.
In such scheme, the analysis calculation procedure in the step S1 is realized by following steps：
S101, for vehicle body it is all excitation point write particular number；
S102, foundation define file, and numbering is corresponded with physical name；
S103, by result of calculation input post processing plug-in unit；
S104, plug-in unit will obtain the transverse and longitudinal coordinate value of each bar response curve automatically and store；
S105, maintenance abscissa are constant, and the speed responsive of ordinate is automatically converted into dynamic stiffness response；
S106, according to define file and excitation point a numbering be every curve modification curve title and transverse and longitudinal coordinate Spindle Name；
S107, in Hypergraph generation include each bar dynamic stiffness curve of complete information.
Implement the method for automatically extracting vehicle body attachment point dynamic stiffness of the present invention, have the advantages that：
The method that the present invention automatically extracts vehicle body attachment point dynamic stiffness, pre-processing software Hypermesh is carried
Optistruct solvers calculate the data of obtained speed and frequency (v-f), using in the poster processing soft Hypergraph
Speed and frequency (v-f) data are changed into dynamic stiffness and frequency by the calculation procedure that integrated Tcl/TK program languages are write automatically
(dpds-f) curve data, not only increases calculating speed, and improve accuracy in computation.Due to being attached crawl in vehicle body
In Rigidity Calculation, particularly during vehicle CAE analysis, the required vehicle body attachment point for calculating dynamic stiffness typically has twenties very
To thirties, a point has X to, three directions of Y-direction and Z-direction again；Consider further that prioritization scheme and the contrast of former scheme.Cause
This, the workload for calculating extraction vehicle body attachment point dynamic stiffness data is very big, before using the inventive method, completes one
The extraction work of the vehicle body attachment point dynamic stiffness of car, typically time-consuming 8 man-hours, and after using the inventive method, only need consumption
When 1 man-hour, and the degree of accuracy also improves a lot.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the white body illustraton of model of embodiments of the invention；
Fig. 2, Fig. 3 and Fig. 4 are the step S6 of the embodiment of embodiments of the invention operation interface；
Fig. 5 is the Define files defined in embodiments of the invention；
Fig. 6 operates for the step H of the embodiment of embodiments of the invention；
Fig. 7 is the dynamic stiffness and the result figure of frequency for the vehicle body attachment point that embodiments of the invention convert extraction automatically；
Fig. 8, Fig. 9 are the arrowband figure and 1/3 octave component figure for the vehicle body attachment point that embodiments of the invention convert extraction automatically；
Figure 10 automatically obtains the Tcl/Tk program flow diagrams of dynamic stiffness curve.
Embodiment
In order to which technical characteristic, purpose and effect to the present invention are more clearly understood from, now compare accompanying drawing and describe in detail
The embodiment of the present invention.
The method that the present invention automatically extracts vehicle body attachment point dynamic stiffness comprises the following steps：
S1, with the good analysis calculation procedure for automatically extracting vehicle body attachment point dynamic stiffness of Tcl/Tk programming languages, and
In the second development interface for being integrated in CAE analysis the poster processing soft Hypergraph；
S2, white body geometrical model is set up under vehicle coordinate system in CATIA softwares；
S3, white body geometrical model imported into CAE analysis pre-processing software Hypermesh；
S4, mesh generation (as shown in Figure 1), material parameter and attribute are carried out to white body geometrical model assign, connect and build
Vertical, dynamic stiffness load working condition is set, wherein, a direction of a point needs to set up 5 load collectors, is respectively：
Eigrl (sets modal calculation frequency range), darea (one unit exciting force of loading), and tabled1 (sets exciting force frequency sweep
Scope), rload1 (calls unit exciting force darea and exciting force swept frequency range tabled1), and frequency (sets output
Frequency range, original frequency F1, increment DF, and incremental number NDF), output is provided that speed (velocity)；
S5, the Optistruct solvers carried with Hypermesh softwares carry out solution calculating and obtain .pch destination files,
Now, calculate obtain be vehicle body attachment point X to, Y-direction and Z-direction in the speed defined in step D in the range of rate-adaptive pacemaker
With the data of frequency (v-f)；
S6, in CAE analysis the poster processing soft Hypergraph, call program (such as Fig. 2 of Tcl/Tk programming languages
It is shown), according to prompting selection dynamic stiffness (dpds) module (as shown in Figure 3), import .pch destination files (as shown in Figure 4)；G、
The node serial number and the corresponding relation of title for a series of vehicle body attachment points to be extracted are defined with notepad, Define files are generated
(.txt) (as shown in Figure 5)；H, the defined good Define files (.txt) (as shown in Figure 6) of importing, and operation program；I, journey
Sequence can change into the X of vehicle body attachment point automatically to speed and frequency (v-f) data of, Y-direction and Z-direction the X of vehicle body attachment point
To, Y-direction and the data of the dynamic stiffness and frequency (dpds-f) of Z-direction, the X of all vehicle body attachment points is obtained to the dynamic of, Y-direction and Z-direction
Stiffness curve (as shown in Figure 7), wherein, the theoretical formula of conversion foundation is：Dpds=2 π f/v.
The Tcl/Tk programs that the present invention is write also include：A, main program is calculated to the obtained X of vehicle body attachment point to, Y
It is dynamic in 1/3 octave component data, convenient each octave frequency range of investigation according to being converted into by narrow frequency to the dynamic stiffness curve with Z-direction
Rigidity result (as shown in Figure 8,9)；B, can by the X of vehicle body attachment point to the dynamic stiffness curve data of, Y-direction and Z-direction with text
(.txt) form is exported, convenient that dynamic stiffness digital independent and contrast are carried out under various software platforms.
As shown in Figure 10, the analysis calculation procedure in step S1 is realized by following steps：
S101, for vehicle body it is all excitation point write particular number；
S102, foundation define file, and numbering is corresponded with physical name；
S103, by result of calculation (each point speed responsive) input post processing plug-in unit；
S104, plug-in unit will obtain the transverse and longitudinal coordinate value of each bar response curve automatically and store；
S105, maintenance abscissa are constant, and the speed responsive of ordinate is automatically converted into dynamic stiffness response (Kd=2*pi*
f/v)；
S106, according to define file and excitation point a numbering be every curve modification curve title and transverse and longitudinal coordinate Spindle Name；
S107, in Hypergraph generation include each bar dynamic stiffness curve of complete information.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (2)
1. a kind of method for automatically extracting vehicle body attachment point dynamic stiffness, it is characterised in that comprise the following steps：
S1, with the good analysis calculation procedure for automatically extracting vehicle body attachment point dynamic stiffness of Tcl/Tk programming languages, it is and integrated
In CAE analysis the poster processing soft Hypergraph second development interface；
S2, white body geometrical model is set up under vehicle coordinate system in CATIA softwares；
S3, white body geometrical model imported into CAE analysis pre-processing software Hypermesh；
S4, carry out that mesh generation, material parameter and attribute are assigned, connection is set up, dynamic stiffness load work to white body geometrical model
Condition is set；
S5, the Optistruct solvers carried with Hypermesh softwares are calculated, and solution obtains destination file；
S6, in CAE analysis the poster processing soft Hypergraph, the program of Tcl/Tk programming languages is called, according to prompting
Select dynamic stiffness module, import destination file；
S7, the node serial number and the corresponding relation of title that a series of vehicle body attachment points to be extracted are defined with notepad, generation
Define files；
S8, the defined good Define files of importing, and operation program；
S9, program can automatically process the dynamic stiffness curve for obtaining all vehicle body attachment points.
2. the method according to claim 1 for automatically extracting vehicle body attachment point dynamic stiffness, it is characterised in that the step S1
In analysis calculation procedure realized by following steps：
S101, for vehicle body it is all excitation point write particular number；
S102, foundation define file, and numbering is corresponded with physical name；
S103, by result of calculation input post processing plug-in unit；
S104, plug-in unit will obtain the transverse and longitudinal coordinate value of each bar response curve automatically and store；
S105, maintenance abscissa are constant, and the speed responsive of ordinate is automatically converted into dynamic stiffness response；
S106, according to define file and excitation point a numbering be every curve modification curve title and transverse and longitudinal coordinate Spindle Name；
S107, in Hypergraph generation include each bar dynamic stiffness curve of complete information.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109033606A (en) * | 2018-07-19 | 2018-12-18 | 北京长城华冠汽车技术开发有限公司 | The optimum design method and device of windscreen wiper mounting bracket before automobile |
| CN109063295A (en) * | 2018-07-20 | 2018-12-21 | 北京长城华冠汽车技术开发有限公司 | Nodal information optimized treatment method and device based on CAE model |
| CN109376378A (en) * | 2018-09-10 | 2019-02-22 | 重庆长安汽车股份有限公司 | A kind of Pre-and Post-processing of rapidly extracting white body installation point rigidity result |
| CN109472094A (en) * | 2018-11-14 | 2019-03-15 | 北京长城华冠汽车技术开发有限公司 | It is vented sling point method for optimization analysis and system |
| CN109711020A (en) * | 2018-12-14 | 2019-05-03 | 北京长城华冠汽车技术开发有限公司 | Automobile body-in-white dynamic stiffness optimization method and device |
| CN109840341A (en) * | 2017-11-29 | 2019-06-04 | 宝沃汽车（中国）有限公司 | Modeling method, device and the storage medium of auto model |
| CN111797472A (en) * | 2020-06-24 | 2020-10-20 | 中国第一汽车股份有限公司 | CAE simulation automatic modeling method for rigidity of auxiliary frame connecting point |
| CN111814376A (en) * | 2020-07-08 | 2020-10-23 | 恒大新能源汽车投资控股集团有限公司 | Method for extracting rigidity result of vehicle body attachment point and electronic equipment |
| CN112163272A (en) * | 2020-09-07 | 2021-01-01 | 重庆长安汽车股份有限公司 | Method for setting dynamic stiffness target of vehicle body attachment point and designing structure |
| CN112307589A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Unit working condition creating method and device, electronic equipment and storage medium |
| CN112861261A (en) * | 2021-01-29 | 2021-05-28 | 西藏宁算科技集团有限公司 | Vehicle body attachment point dynamic stiffness post-processing method and device and electronic equipment |
| CN113158411A (en) * | 2021-02-04 | 2021-07-23 | 湖州中科晟合信息科技有限公司 | ODB file generation method based on CAE analysis result |
| CN113297673A (en) * | 2021-06-01 | 2021-08-24 | 江铃汽车股份有限公司 | CAE (computer aided engineering) automatic modeling method for IPI (internet protocol interface) response analysis of automobile body attachment point |
| CN113591219A (en) * | 2021-07-29 | 2021-11-02 | 重庆长安汽车股份有限公司 | Multi-working-condition CAE transient fatigue analysis loading method for whole vehicle |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109840341A (en) * | 2017-11-29 | 2019-06-04 | 宝沃汽车（中国）有限公司 | Modeling method, device and the storage medium of auto model |
| CN109033606A (en) * | 2018-07-19 | 2018-12-18 | 北京长城华冠汽车技术开发有限公司 | The optimum design method and device of windscreen wiper mounting bracket before automobile |
| CN109063295A (en) * | 2018-07-20 | 2018-12-21 | 北京长城华冠汽车技术开发有限公司 | Nodal information optimized treatment method and device based on CAE model |
| CN109063295B (en) * | 2018-07-20 | 2023-05-12 | 北京长城华冠汽车技术开发有限公司 | Node information optimization processing method and device based on CAE model |
| CN109376378A (en) * | 2018-09-10 | 2019-02-22 | 重庆长安汽车股份有限公司 | A kind of Pre-and Post-processing of rapidly extracting white body installation point rigidity result |
| CN109472094A (en) * | 2018-11-14 | 2019-03-15 | 北京长城华冠汽车技术开发有限公司 | It is vented sling point method for optimization analysis and system |
| CN109711020A (en) * | 2018-12-14 | 2019-05-03 | 北京长城华冠汽车技术开发有限公司 | Automobile body-in-white dynamic stiffness optimization method and device |
| CN112307589A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Unit working condition creating method and device, electronic equipment and storage medium |
| CN112307589B (en) * | 2019-07-31 | 2023-11-14 | 比亚迪股份有限公司 | Unit working condition creation method and device, electronic equipment and storage medium |
| CN111797472B (en) * | 2020-06-24 | 2022-12-27 | 中国第一汽车股份有限公司 | CAE simulation automatic modeling method for rigidity of auxiliary frame connection point |
| CN111797472A (en) * | 2020-06-24 | 2020-10-20 | 中国第一汽车股份有限公司 | CAE simulation automatic modeling method for rigidity of auxiliary frame connecting point |
| CN111814376A (en) * | 2020-07-08 | 2020-10-23 | 恒大新能源汽车投资控股集团有限公司 | Method for extracting rigidity result of vehicle body attachment point and electronic equipment |
| CN112163272A (en) * | 2020-09-07 | 2021-01-01 | 重庆长安汽车股份有限公司 | Method for setting dynamic stiffness target of vehicle body attachment point and designing structure |
| CN112163272B (en) * | 2020-09-07 | 2022-06-07 | 重庆长安汽车股份有限公司 | Method for setting dynamic stiffness target of vehicle body attachment point and designing structure |
| CN112861261A (en) * | 2021-01-29 | 2021-05-28 | 西藏宁算科技集团有限公司 | Vehicle body attachment point dynamic stiffness post-processing method and device and electronic equipment |
| CN113158411A (en) * | 2021-02-04 | 2021-07-23 | 湖州中科晟合信息科技有限公司 | ODB file generation method based on CAE analysis result |
| CN113297673B (en) * | 2021-06-01 | 2022-04-22 | 江铃汽车股份有限公司 | CAE (computer aided engineering) automatic modeling method for IPI (internet protocol interface) response analysis of automobile body attachment point |
| CN113297673A (en) * | 2021-06-01 | 2021-08-24 | 江铃汽车股份有限公司 | CAE (computer aided engineering) automatic modeling method for IPI (internet protocol interface) response analysis of automobile body attachment point |
| CN113591219A (en) * | 2021-07-29 | 2021-11-02 | 重庆长安汽车股份有限公司 | Multi-working-condition CAE transient fatigue analysis loading method for whole vehicle |
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