CN110826147B - Automobile seat design method, equipment and medium based on energy distribution control - Google Patents
Automobile seat design method, equipment and medium based on energy distribution control Download PDFInfo
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Abstract
The invention provides an automobile seat design method based on energy distribution control, which comprises the steps of establishing a seat impact finite element model, simulating energy distribution between a plurality of seat parts and a dummy model in a preset seat model under the collision working condition of a vehicle, obtaining a seat energy data set, and extracting a seat total energy value and all seat part energy values in the seat energy data set; judging whether the total energy value of the seat and the energy value of the seat component meet a preset energy distribution table, judging whether the seat component in the seat model fails, calculating the value of the bearing energy of each seat component when the seat collides, effectively evaluating the influence of the impact response of the overall framework of the seat according to the bearing energy value of each seat component, and judging whether each seat component needs to be improved. According to the automobile seat design method based on energy distribution control, the seat improvement range is reduced, the seat development period is shortened to a certain extent, and the product competitiveness is improved.
Description
Technical Field
The invention relates to the field of automobile seat design, in particular to an automobile seat design method, equipment and medium based on energy distribution control.
Background
The automobile seat is an important automobile part, and can effectively protect the personal safety of passengers when the automobile collides, and reduce the injury of the passengers in the collision process. Along with the continuous development and evolution of automobile technology, the intelligent and lightweight technology becomes an important trend of automobile technology development in recent years, and as an important part of an automobile, an automobile seat has a long development period due to complex structure and various factors such as safety, environmental protection, NVH and the like, and has more related test projects, and only test verification takes a quite long time. In the traditional automobile seat design process, the seat framework is taken as a whole, the influence of a single part on the impact response of the whole seat framework cannot be effectively evaluated, and then after the problem occurs in a test, local reinforcement is carried out, so that the failure risk of other parts is increased, the failure risk of the single part of the whole framework cannot be effectively controlled, and the design period of the whole automobile seat is longer.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide an automobile seat design method based on energy distribution control, which can solve the problems that in the traditional automobile seat design process, a seat framework is taken as a whole, the influence of a single component on the impact response of the whole framework of the seat cannot be effectively evaluated, further, when the test is performed, the local reinforcement is performed after the problem occurs, the failure risk of other components is increased, the failure risk of the single component of the whole framework cannot be effectively controlled, and the design period of the whole automobile seat is longer.
The second objective of the present invention is to provide an electronic device, which can solve the problems that in the conventional design process of an automobile seat, the seat skeleton is considered as a whole, the impact of a single component on the impact response of the whole seat skeleton cannot be effectively evaluated, and further, when a test is performed, the impact is locally reinforced, the failure risk of other components is increased, the failure risk of the single component of the whole skeleton cannot be effectively controlled, and the design period of the whole automobile seat is longer.
It is still another object of the present invention to provide a computer readable storage medium, which can solve the problems that in the conventional car seat design process, considering the seat frame as a whole, the impact of a single component on the impact response of the whole seat frame cannot be effectively evaluated, and further, when the test is performed, the local reinforcement is performed, so that the failure risk of other components is increased, the failure risk of the single component of the whole frame cannot be effectively controlled, and the design period of the whole car seat is longer.
One of the purposes provided by the invention is realized by adopting the following technical scheme:
an automobile seat design method based on energy distribution control comprises the following steps:
S1, sequentially carrying out division processing, material attribute giving processing, dummy model importing processing, constraint processing and attribute configuration processing on a preset seat model to obtain a seat impact finite element model comprising the seat model and the dummy model, wherein the seat model comprises a plurality of seat parts;
S2, loading a preset acceleration curve on the seat impact finite element model, calculating the energy of the finite element model added on the preset acceleration curve by using a preset finite element solver, and simulating the energy distribution between a plurality of seat parts and a dummy model in a preset seat model under the collision working condition of the vehicle to obtain a seat energy data set, wherein the seat energy data set comprises a seat total energy value and a seat part energy value;
s3, extracting the total seat energy value and all seat component energy values in the seat energy data set;
S4, judging whether the seat total energy value and the seat component energy value meet a preset energy distribution table, if so, executing a step S6, if not, generating data of the seat component which do not meet the data, and executing a step S5;
S5, improving the corresponding seat part in the seat model according to the data of the unsatisfied seat part, taking the improved seat model as a preset seat model again, and continuously executing the step S1;
S6, judging whether the seat part in the seat model fails, if so, improving the seat part which fails, taking the improved seat model as a preset seat model again, and returning to the step S1, and if not, taking the seat model as a qualified seat model.
Further, the step S1 specifically includes:
Dividing, namely performing assembly division on a preset seat model to obtain an assembly file, and performing grid division on the assembly file to obtain a seat finite element basic model;
Material attribute giving processing, namely setting boundary conditions of a seat finite element basic model, giving preset material attributes to different seat parts in the seat finite element basic model, and establishing contact pairs between the different seat parts in the seat finite element basic model;
The dummy model is imported and processed, and the finite element dummy model is placed on the seat finite element basic model according to preset position data;
Constraint processing, namely establishing a constraint system of a finite element dummy model and a seat finite element basic model according to preset coordinate data;
And (3) performing attribute configuration processing, namely setting an impact curve, a model control card and model data output on a finite element dummy model and a seat finite element basic model which form a constraint system, and obtaining a seat impact finite element model containing a seat model and a dummy model.
Further, the preset position data includes, but is not limited to, H-point coordinates, back angle, foot root point coordinates, rotation angles of the head and joints.
Further, the restraint system comprises a vehicle body floor, a belt lower fixing point, a belt upper fixing point, a retractor and a belt.
Further, the method further includes setting a preset energy distribution table, setting a plurality of different target energy duty ratio ranges and a plurality of seat part names, correlating the seat part names with the target energy duty ratio ranges according to preset correlation attributes, and enabling each seat part name to correspond to a unique target energy duty ratio range.
Further, the determining whether the seat total energy value and the seat component energy value satisfy a preset energy distribution table specifically includes: and calculating the energy ratio of the seat part according to the energy value of the seat part and the total energy value of the seat, and judging whether the energy ratio of the seat part meets the corresponding target energy ratio range in the energy distribution table.
Further, the seat component comprises, but is not limited to, a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat cushion connecting plate, a recliner and a slide rail, wherein the seat component energy value comprises a backrest upper beam energy value, a backrest lower beam energy value, a seat cushion side plate energy value, a seat cushion connecting plate energy value, a recliner energy value and a slide rail energy value, and the seat component name comprises a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat cushion connecting plate, a recliner and a slide rail.
Further, the judging whether the seat component in the seat model fails specifically includes: judging whether the seat part in the seat model has a tearing or damage risk in the impact process.
The second purpose of the invention is realized by adopting the following technical scheme:
An electronic device, comprising: a processor;
A memory; and a program, wherein the program is stored in the memory and configured to be executed by the processor, the program comprising a method for designing an automobile seat based on energy distribution control for executing the present application.
The third purpose of the invention is realized by adopting the following technical scheme:
A computer-readable storage medium has stored thereon a computer program that is executed by a processor to perform a vehicle seat design method based on energy distribution control of the present application.
Compared with the prior art, the application has the beneficial effects that: the application relates to an automobile seat design method based on energy distribution control, which comprises the steps of establishing a seat impact finite element model, simulating energy distribution between a plurality of seat parts and a dummy model in a preset seat model under the collision working condition of a vehicle, obtaining a seat energy data set, and extracting a seat total energy value and all seat part energy values in the seat energy data set; judging whether the total energy value of the seat and the energy value of the seat component meet a preset energy distribution table, judging whether the seat component in the seat model fails, calculating the value of the bearing energy of each seat component when the seat collides, effectively evaluating the influence of the impact response of the whole framework of the seat according to the bearing energy value of each seat component, judging whether each seat component needs to be improved, and improving the design of a single or definite-target seat component to meet the design requirement, so that the design improvement direction can be guided to a certain extent, the seat improvement range is reduced, the seat development period is shortened to a certain extent, and the product competitiveness is improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
Fig. 1 is a schematic flow chart of an energy distribution control-based automobile seat design method according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
As shown in fig. 1, the method for designing the automobile seat based on energy distribution control of the invention comprises the following steps:
s1, establishing a finite element model, and sequentially carrying out division processing, material attribute giving processing, dummy model importing processing, constraint processing and attribute configuration processing on a preset seat model to obtain a seat impact finite element model containing the seat model and the dummy model, wherein the seat model comprises a plurality of seat parts. The method comprises the following steps:
Dividing, namely dividing a preset seat model into a seat model assembly, a seat foaming assembly and a plastic part assembly through a seat model preset by CATIA software (a three-dimensional drawing tool), obtaining an assembly file, importing the assembly file into finite element software HYPERMESH (HYPERMESH software is a product of Altair company in the United states, is a CAE application software package with leading world and powerful functions, and is also an innovative and open enterprise-level CAE platform), dividing a sheet metal part of the seat model into shell unit type grids, dividing a seat foaming part and a plastic part into entity unit types, obtaining a seat finite element basic model, and ensuring the feasibility of the seat finite element basic model through methods of grid quality inspection, grid unit interference adjustment, grid normal adjustment and the like.
And (3) material attribute giving treatment, namely carrying out boundary condition setting on the seat finite element basic model, introducing the seat finite element basic model into Oasys Primer software for calculation and carrying out boundary condition setting, wherein the boundary condition setting comprises, but is not limited to, the establishment of simulation bolts and simulation welding, the preset material attribute is given to different seat parts, and contact pairs among the parts of the seat model are established, so that the seat finite element model is ensured to be as close as possible to an actual physical model.
The dummy model is imported and processed, and the finite element dummy model is placed on the seat finite element basic model according to preset position data; the finite element dummy model is imported through an Include function in Oasys Primer software, and is placed on an established seat finite element basic model through adjusting the H point coordinate, the backrest angle, the foot root point coordinate, the head and the rotation angle of each joint of the finite element dummy model.
Constraint processing, namely establishing a constraint system of a finite element dummy model and a seat finite element basic model according to preset coordinate data; the restraint system mainly comprises a vehicle body floor, a lower safety belt fixing point, an upper safety belt fixing point, a retractor and a safety belt, and is used for ensuring that the safety belt successfully restrains the dummy on the seat in the impact process.
And (3) performing attribute configuration processing, namely setting an impact curve, a model control card and model data output on a finite element dummy model and a seat finite element basic model forming a constraint system to obtain a seat impact finite element model containing the seat model and the dummy model, and exporting the established seat impact finite element model into a key form file.
S2, CAE (Computer AIDED ENGINEERING) refers to Computer aided engineering analysis in engineering design, a preset acceleration curve is loaded on a seat impact finite element model, a preset finite element solver is utilized to calculate energy of the finite element model added on the preset acceleration curve, the preset finite element solver utilized in the embodiment is LS-Dyna, LS-Dyna is a geometrically nonlinear (large displacement, large rotation and large strain), material nonlinearity (140 multiple material dynamic models) and contact nonlinearity (50 multiple) program with complete functions, the energy distribution between a plurality of seat parts and a dummy model in a preset seat model under the collision working condition of a vehicle is simulated by calculating the energy of the finite element model added on the preset acceleration curve through selection of the finite element solver type, NCPU core number setting and MEMORY setting, and a seat energy data set is obtained, wherein the seat energy data set comprises a seat total energy value and a seat part energy value;
s3, extracting energy values of all seat parts, and extracting a total seat energy value and all seat part energy values in the seat energy data set.
And S4, judging whether the energy value meets the preset energy distribution table, judging whether the seat total energy value and the seat component energy value meet the preset energy distribution table, if so, executing the step S6, and if not, generating data which does not meet the seat component, and executing the step S5. In this example, the method further includes setting a preset energy distribution table, setting a plurality of different target energy duty ratio ranges and a plurality of seat component names, correlating the seat component names with the target energy duty ratio ranges according to preset correlation properties, and each seat component name corresponds to a unique target energy duty ratio range. The judging whether the seat total energy value and the seat component energy value meet the preset energy distribution table is specifically as follows: and calculating the energy ratio of the seat part according to the energy value of the seat part and the total energy value of the seat, and judging whether the energy ratio of the seat part meets the corresponding target energy ratio range in the energy distribution table. In this embodiment, the seat component includes, but is not limited to, a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat connection plate, a recliner, and a slide rail, the seat component energy value includes a backrest upper beam energy value, a backrest lower beam energy value, a seat cushion side plate energy value, a seat connection plate energy value, a recliner energy value, and a slide rail energy value, and the seat component name includes a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat connection plate, a recliner, and a slide rail. The following exemplifies, for example, table 1 below is a preset energy distribution table after filling the seat part energy value and the seat total energy value into the preset energy distribution table;
Table 1: preset energy distribution table after filling energy value
As shown in the graph 1, the energy values of the upper beam of the backrest, the energy values of the lower beam of the backrest, the energy values of the seat cushion side plates, the energy values of the seat cushion connecting plates, the energy values of the angle adjusters and the energy values of the sliding rails are respectively numbered (namely, represented by P1-P7) and are filled into a preset energy distribution table, and according to the graph, the energy occupation ratio of the seat part comprises the energy occupation ratio of the upper beam of the backrest, the energy occupation ratio of the lower beam of the backrest, the energy occupation ratio of the seat cushion side plates, the energy occupation ratio of the seat cushion connecting plates, the energy occupation ratio of the angle adjusters and the energy occupation ratio of the sliding rails, and the corresponding numbers of the energy occupation ratio of the seat part are C1-C7; the target energy duty ratio range includes a backrest upper beam target energy duty ratio range, a backrest lower beam target energy duty ratio range, a seat cushion side plate target energy duty ratio range, a seat cushion connecting plate target energy duty ratio range, a recliner target energy duty ratio range, a slide rail target energy duty ratio range (corresponding to numbers D1 to D7), judging whether C1 to C7 are in the range of D1 to D7 respectively, and the like, and the total energy of the seat in Table 1 is represented by B. The above values are for illustration only and are not meant to be actual references. In this embodiment, when the preset energy distribution table is not satisfied, the unsatisfied seat component data is generated, where the unsatisfied seat component data includes unsatisfied seat names and unsatisfied factors, where the unsatisfied factors are lower than a target value or exceed the target value, and the energy ratio corresponding to a certain seat component is lower than a corresponding target energy ratio range; above the target value, i.e. the corresponding energy duty cycle of a certain seat part is higher than the corresponding target energy duty cycle range.
S5, improving a corresponding seat part in the seat model according to the data of the unsatisfied seat part, and when the unsatisfied factor is lower than a target value, indicating that the seat part has poor energy absorption effect, and improving the structure of the seat part to increase the energy absorption effect; when the unsatisfied factors are higher than the target values, the energy absorption effect of the seat part is too good, and the energy absorption effect can be reduced by improving the structure of the seat part; and (3) taking the improved seat model as a preset seat model again, and continuing to execute the step (S1).
S6, judging whether the seat part in the seat model is invalid or not, if so, improving the seat part which is invalid, taking the improved seat model as a preset seat model again, and returning to the step S1, if not, taking the seat model as a qualified seat model.
The application relates to an automobile seat design method based on energy distribution control, which comprises the steps of establishing a seat impact finite element model, simulating energy distribution between a plurality of seat parts and a dummy model in a preset seat model under the collision working condition of a vehicle, obtaining a seat energy data set, and extracting a seat total energy value and all seat part energy values in the seat energy data set; judging whether the total energy value of the seat and the energy value of the seat component meet a preset energy distribution table, judging whether the seat component in the seat model fails, calculating the value of the bearing energy of each seat component when the seat collides, effectively evaluating the influence of the impact response of the overall framework of the seat according to the bearing energy value of each seat component, and judging whether each seat component needs to be improved. The beneficial effects are as follows: 1. by setting the energy distribution table of each part of the seat system under each collision working condition, the proportion value of the energy of each part of the seat in the table to the total energy of the seat system can ensure that the energy of each part of the seat is balanced and stable while the performance of the seat system meets the design target, and the energy distribution table has higher engineering application value. 2. In the design stage of the seat component structure, the improvement direction of the seat structure design is guided by comparing whether the energy distribution of each component of the seat meets the target value. 3. Through carrying out design change to single or well-defined several seat parts of target to reach the design requirement, can instruct the design to improve the direction to a certain extent, reduce the seat range of improvement, shortened seat development cycle, promoted product competitiveness. 4. After each part of the seat meets the energy distribution requirement, judging the failure risk of the seat, further definitely improving the part, and determining the design data after the part is improved until no failure risk exists. 5. The seat design data and the improvement targets can be effectively clarified, the seat design and development work efficiency can be effectively improved, and the method has higher engineering application value.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can smoothly practice the invention as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
Claims (10)
1. An automobile seat design method based on energy distribution control is characterized by comprising the following steps:
S1, sequentially carrying out division processing, material attribute giving processing, dummy model importing processing, constraint processing and attribute configuration processing on a preset seat model to obtain a seat impact finite element model comprising the seat model and the dummy model, wherein the seat model comprises a plurality of seat parts;
S2, loading a preset acceleration curve on the seat impact finite element model, calculating the energy of the finite element model loaded with the preset acceleration curve by using a preset finite element solver, and simulating the energy distribution between a plurality of seat parts in the preset seat model and the dummy model under the vehicle collision working condition to obtain a seat energy data set, wherein the seat energy data set comprises a seat total energy value and a seat part energy value;
s3, extracting the total seat energy value and all seat component energy values in the seat energy data set;
S4, judging whether the seat total energy value and the seat component energy value meet a preset energy distribution table, if so, executing a step S6, if not, generating data of the seat component which do not meet the data, and executing a step S5;
S5, improving the corresponding seat part in the seat model according to the data of the unsatisfied seat part, taking the improved seat model as a preset seat model again, and continuously executing the step S1;
S6, judging whether the seat part in the seat model fails, if so, improving the seat part which fails, taking the improved seat model as a preset seat model again, and returning to the step S1, and if not, taking the seat model as a qualified seat model.
2. A method of designing a vehicle seat based on energy distribution control as claimed in claim 1, wherein: the step S1 specifically comprises the following steps:
Dividing, namely performing assembly division on a preset seat model to obtain an assembly file, and performing grid division on the assembly file to obtain a seat finite element basic model;
Material attribute giving processing, namely setting boundary conditions of a seat finite element basic model, giving preset material attributes to different seat parts in the seat finite element basic model, and establishing contact pairs between the different seat parts in the seat finite element basic model;
The dummy model is imported and processed, and the finite element dummy model is placed on the seat finite element basic model according to preset position data;
Constraint processing, namely establishing a constraint system of a finite element dummy model and a seat finite element basic model according to preset coordinate data;
And (3) performing attribute configuration processing, namely setting an impact curve, a model control card and model data output on a finite element dummy model and a seat finite element basic model which form a constraint system, and obtaining a seat impact finite element model containing a seat model and a dummy model.
3. A method of designing a vehicle seat based on energy distribution control as claimed in claim 2, wherein: the preset position data comprise an H point coordinate, a backrest angle, a foot root point coordinate, and rotation angles of the head and joints.
4. A method of designing a vehicle seat based on energy distribution control as claimed in claim 2, wherein: the restraint system comprises a vehicle body floor, a safety belt lower fixing point, a safety belt upper fixing point, a retractor and a safety belt.
5. A method of designing a vehicle seat based on energy distribution control as claimed in claim 1, wherein: and before the step S4, setting a preset energy distribution table, setting a plurality of different target energy ratio ranges and a plurality of seat part names, correlating the seat part names with the target energy ratio ranges according to preset correlation attributes, and enabling each seat part name to correspond to a unique target energy ratio range.
6.A method of designing a vehicle seat based on energy distribution control as defined in claim 5, wherein: the judging whether the seat total energy value and the seat component energy value meet a preset energy distribution table specifically comprises: and calculating the energy ratio of the seat part according to the energy value of the seat part and the total energy value of the seat, and judging whether the energy ratio of the seat part meets the corresponding target energy ratio range in the energy distribution table.
7. A method of designing a vehicle seat based on energy distribution control as defined in claim 6, wherein: the seat component comprises a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat cushion connecting plate, an angle adjuster and a sliding rail, wherein the seat component energy value comprises a backrest upper beam energy value, a backrest lower beam energy value, a seat cushion side plate energy value, a seat cushion connecting plate energy value, an angle adjuster energy value and a sliding rail energy value, and the seat component name comprises a backrest upper beam, a backrest lower beam, a seat cushion side plate, a seat cushion connecting plate, an angle adjuster and a sliding rail.
8. A method of designing a vehicle seat based on energy distribution control as claimed in claim 1, wherein: the judging whether the seat component in the seat model fails specifically comprises the following steps: judging whether the seat part in the seat model has a tearing or damage risk in the impact process.
9. An electronic device, comprising: a processor;
A memory; and a program, wherein the program is stored in the memory and configured to be executed by a processor, the program comprising instructions for performing the method of any of claims 1-8.
10. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program being adapted to be executed by a processor to perform the method of any of claims 1-8.
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