CN113656883B - Tire finite element simulation analysis data post-processing method - Google Patents
Tire finite element simulation analysis data post-processing method Download PDFInfo
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- CN113656883B CN113656883B CN202110568313.7A CN202110568313A CN113656883B CN 113656883 B CN113656883 B CN 113656883B CN 202110568313 A CN202110568313 A CN 202110568313A CN 113656883 B CN113656883 B CN 113656883B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004458 analytical method Methods 0.000 title claims abstract description 33
- 238000004088 simulation Methods 0.000 title claims abstract description 23
- 238000012805 post-processing Methods 0.000 title claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 51
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 8
- 238000013507 mapping Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 238000013506 data mapping Methods 0.000 abstract description 2
- 230000001052 transient effect Effects 0.000 description 3
- 238000013075 data extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- 230000000007 visual effect Effects 0.000 description 1
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- 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
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- 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]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T13/00—Animation
- G06T13/20—3D [Three Dimensional] animation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the field of finite element simulation analysis for tire design and development, in particular to a method for post-processing tire finite element simulation analysis data. Firstly, the tire circumferential direction is equally divided into 180 sections, and in the process of rolling the tire for one circle, the stress state of one section rolling for one circle can be selected to represent the stress state of the whole tire rolling for one circle; secondly, the 180 parts of three-dimensional tire sections are subjected to data mapping and converted into 180 parts of two-dimensional plane tire models, so that later data processing, display and storage are facilitated; then, each two-dimensional tire model is subjected to data association with a position unit, when data of a certain unit rolling for one circle is extracted, the unit is directly selected, all data of the unit of one circle is automatically selected, 180 units of the circle correspond to 180 frames of any unit rolling for one circle, and therefore each item of history data of the required unit in one circle can be directly extracted.
Description
Technical Field
The invention relates to the field of finite element simulation analysis for tire design and development, in particular to a method for post-processing tire finite element simulation analysis data.
Background
At present, the explosive development of the automobile industry promotes the updating period of tire products to be greatly shortened, in order to adapt to the trend, and also in order to improve the mechanical properties of tires more pertinently, a plurality of tire enterprises introduce tire finite element analysis technologies in the design and development processes of the tires so as to carry out simulation analysis on the contents of inflation, loading, steady-state rolling and the like on the tires, wherein the steady-state rolling analysis is an important simulation analysis content thereof.
The processing of a large amount of data after steady-state rolling analysis and calculation is very complicated, and the main problems in the current data post-processing link are as follows: 1. for the tire steady-state rolling simulation analysis calculation result, the stress state of the tire model in one cycle of rolling cannot be visually checked; 2. extracting process data of a certain unit in the tire, wherein the process data is required to be selected from all data in the unit rolling for one circle, and the data extraction is very inconvenient; 3. the large amount of result data requires a high amount of memory space. Therefore, the invention provides a method for post-processing tire finite element simulation analysis data.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the invention discloses a method for post-processing tire finite element simulation analysis data.
In order to achieve the above object, the present invention provides the following technical solutions:
a method for processing tire finite element simulation analysis data,
step one, processing a tire material distribution diagram, dividing the material distribution diagram into grids, and establishing a finite element model;
defining material properties, section properties, boundary conditions and contact properties of the model, and creating an analysis step;
step three, rotating the defined two-dimensional tire discretization model along the tire circumferential direction to generate a three-dimensional discretization model with 180 equally divided circumferential directions, expressing the rolling state of the whole tire by using process data of one circle of rolling of any section, wherein the 180 sections can be regarded as 180 transients of one section in the process of one circle of rolling, and carrying out tire steady-state rolling analysis simulation calculation on each transient;
step four, according to the result file of steady-state rolling analysis calculation, the node data of the three-dimensional tire model are mapped to the two-dimensional tire model, so that 180 two-dimensional tire models are generated, each two-dimensional tire model is equivalent to one frame in the tire rolling process, the 180 frames form the whole steady-state rolling process of the tire, the three-dimensional tire model is converted into the two-dimensional plane tire model, the dynamic processing and one-key extraction of later process data are facilitated, the result file is greatly reduced, and the storage space is saved
Step five, developing a finite element visualization program according to a programming language (such as python) by using an existing drawing unit cloud image method (such as a scanning line method) or a new method, drawing stress cloud images and strain energy density cloud images of 180 planar two-dimensional tire models by using the finite element visualization program, and finally manufacturing 180 cloud images into an animation by using animation processing software or programming language, so that dynamic changes of various data of a tire in steady state rolling for one week can be more intuitively checked;
and step six, when each item of process data of one unit rolling for one circle is extracted, the required unit is directly selected, and one-key extraction of the process data of one circle rolling for the unit can be realized.
Further, a material distribution map is drawn based on drawing software, and the material distribution map is gridded based on finite element analysis software.
The invention has the beneficial effects that:
1. the invention provides a tire finite element simulation analysis data post-processing method, which can realize visual display of various process data of a three-dimensional tire in steady state rolling for one week;
2. the invention provides a tire finite element simulation analysis data post-processing method, which can realize one-key extraction of each course data of a certain unit in a discretized tire model in steady-state rolling for one circle;
3. the invention provides a tire finite element simulation analysis data post-processing method, which is characterized in that after three-dimensional model data are converted into two-dimensional model data, a calculation result file is reduced from original G to tens M at present, and the data storage space is greatly saved;
4. the invention provides a method for post-processing tire finite element simulation analysis data, which is not only suitable for post-processing tire steady-state rolling analysis data, but also suitable for other annular structures.
Drawings
FIG. 1 is a tire material distribution diagram;
FIG. 2 is a two-dimensional tire finite element model;
FIG. 3 is a three-dimensional tire finite element model;
FIG. 4 is 1 of the 180 tire sections in equal parts;
FIG. 5 is a three-dimensional tire model in a cylindrical coordinate system;
FIG. 6 is a hexahedral cell arbitrarily selected in a three-dimensional tire model;
fig. 7 is an extraction of each node data of the hexahedral cell;
fig. 8 is a planar quadrilateral element after hexahedral element mapping;
FIG. 9 is an extraction of data for each node of a pentahedron unit;
FIG. 10 is a planar triangle cell after pentahedral cell mapping;
FIG. 11 is the maximum principal strain of the tire unit at 1/4 week of rolling;
FIG. 12 is the maximum principal strain of the tire unit at 1/2 week of rolling;
FIG. 13 is the maximum principal strain of the tire unit at 3/4 of a revolution;
FIG. 14 is the maximum principal strain of the tire unit at 1 week of rolling or just beginning rolling;
FIG. 15 is the maximum principal strain for a cell rolled one revolution extracted by a one-touch method of the present invention;
FIG. 16 is a three-dimensional model of an original tire;
FIG. 17 is a state diagram when looking at certain data;
FIG. 18 is a state of stress for a certain section of the tire;
fig. 19 is a schematic flow chart of the method of the present invention.
Detailed Description
In order to make the technical solution of the present invention more clear and obvious to those skilled in the art, the technical solution of the present invention will be described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
After steady-state rolling analysis, the traditional three-dimensional tire can only obtain a three-dimensional model with data, as shown in fig. 16, when certain data, such as the maximum main strain, are required to be checked, the stress state of a section cannot be checked, and the stress state of one circle of rolling cannot be checked, so that the three-dimensional tire is required to be checked in a section cutting mode, but the stress state of the section at a certain moment can be checked, as shown in fig. 18, and the stress state in the whole rolling process cannot be checked.
According to the invention, a dynamic display effect can be realized, and the change of the required simulation data in the rolling process of one circle can be visually checked. The method comprises the following steps:
step one, processing a tire material distribution diagram based on drawing software (such as AutoCAD, haochun CAD and the like), such as FIG. 1, meshing the material distribution diagram, and establishing a finite element model, such as FIG. 2;
defining material properties, section properties, boundary conditions and contact properties of the model, and creating an analysis step;
step three, as shown in fig. 3, rotating the defined two-dimensional tire discretization model along the circumferential direction of the tire to generate 180 equally-divided three-dimensional discretization models in the circumferential direction; FIG. 4 is 1 of the 180 tire sections in equal parts; because the tire is an axisymmetric model, the 180 equally divided sections are identical in all other aspects except for the difference of grounding sequences during rolling; in other words, the rolling state of the whole tire is expressed by using the process data of one rolling circle of any section, the 180 sections can be regarded as 180 transient states of one section in the rolling circle process, and tire steady-state rolling analysis simulation calculation is carried out on each transient state;
step four, according to a result file of steady-state rolling analysis calculation, mapping the three-dimensional tire model node data to a two-dimensional tire model, and specifically, mapping the three-dimensional tire model to the two-dimensional tire model: the three-dimensional tire model in the rectangular coordinate system is converted into the cylindrical coordinate system, as shown in fig. 5, where ρ is the distance from the node in the radial direction to the center of the tire, θ is the angle corresponding to the node in the circumferential direction, and z is the position of the node in the vertical direction, and at this time, each node data in the three-dimensional model can be represented in the cylindrical coordinate system. Taking a hexahedral unit in a three-dimensional model (in the whole three-dimensional tire model, only hexahedral units and pentahedral units exist in the rubber unit, and the principle that the pentahedral units are mapped to planar triangle units is shown in fig. 9 and 10) as an example, a three-dimensional to two-dimensional data mapping method is described in detail, a hexahedral unit in the three-dimensional model is arbitrarily selected, as shown in fig. 6, the data of each node of the unit is read, midpoint data extraction is carried out on the edges of the unit along the circumferential direction, as shown in fig. 7, four midpoints of four edges of the extracted circumferential direction can be used for obtaining a planar quadrilateral unit, as shown in fig. 8, and the like, a planar two-dimensional tire model corresponding to 180 space three-dimensional tire sections can be obtained, each two-dimensional tire model is equivalent to one frame in the tire rolling process, and the 180 frames form the whole steady-state rolling process of the tire, so that the three-dimensional space tire model is converted into the two-dimensional planar tire model, the dynamic processing and the one-key extraction of later calendar data are convenient, the result file is greatly reduced, and the storage space is saved.
Step five, developing a finite element visualization program according to a programming language (such as python) by using an existing drawing unit cloud image method (such as a scanning line method) or a new method, drawing stress cloud images and strain energy density cloud images of 180 planar two-dimensional tire models by using the finite element visualization program, and finally manufacturing 180 cloud images into an animation by using animation processing software or programming language, so that dynamic changes of various data of a tire in steady state rolling for one week can be more intuitively checked;
and step six, when each item of process data of one unit rolling for one circle is extracted, the required unit is directly selected, and one-key extraction of the process data of one circle rolling for the unit can be realized.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make many possible variations and modifications of the invention using the method and the content disclosed above without departing from the scope of the invention, which is defined in the claims.
Claims (4)
1. A method for post-processing tire finite element simulation analysis data is characterized by comprising the following steps:
step one, processing a tire material distribution diagram, dividing the material distribution diagram into grids, and establishing a finite element model;
defining material properties, section properties, boundary conditions and contact properties of the model, and creating an analysis step;
thirdly, rotating the defined two-dimensional tire discretization model along the circumferential direction of the tire to generate 180 equally-divided three-dimensional discretization models in the circumferential direction; wherein, the course data of one circle of rolling of any section expresses the rolling state of the whole tire;
step four, mapping the three-dimensional tire model node data to a two-dimensional tire model according to a result file of steady-state rolling analysis calculation, and generating 180 two-dimensional tire models; each two-dimensional tire model is equivalent to one frame in the tire rolling process, and 180 frames form the whole steady-state tire rolling process;
developing a finite element visualization program according to a programming language by using a drawing unit cloud image method, drawing stress cloud images and strain energy density cloud images of 180 planar two-dimensional tire models by using the finite element visualization program, and finally manufacturing 180 cloud images into an animation by using animation processing software or programming language so as to check dynamic changes of various data of a tire in steady state rolling for one circle;
and step six, selecting the required unit when extracting each item of history data of one unit rolling for one circle, so as to realize one-key extraction of the history data of the unit rolling for one circle.
2. A method of tire finite element simulation analysis data post-processing as in claim 1, wherein: drawing a material distribution diagram based on drawing software, and meshing the material distribution diagram based on finite element analysis software.
3. A method of tire finite element simulation analysis data post-processing as in claim 1, wherein: the cell cloud image method comprises a scanning line method.
4. A method of tire finite element simulation analysis data post-processing as in claim 1, wherein: the programming language includes python.
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| JP7406092B2 (en) * | 2020-02-27 | 2023-12-27 | 横浜ゴム株式会社 | Tire simulation method, program, and tire simulation device |
| CN114840926B (en) * | 2022-04-27 | 2022-11-08 | 哈尔滨工业大学 | Method for generating three-dimensional finite element grid with complex tire patterns |
| CN114861501B (en) * | 2022-05-26 | 2024-09-17 | 赛轮集团股份有限公司 | Tire finite element simulation data extraction method, electronic equipment and storage medium |
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| JPH11153520A (en) * | 1997-11-25 | 1999-06-08 | Sumitomo Rubber Ind Ltd | Method and apparatus for simulation of performance of tire |
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