Energy absorption module finite element model trepanning parameterization deformation method, medium and system
A finite element and parametric technology, applied in the field of automotive computer-aided design, which can solve the problems of complex optimization process of hole size deformation and so on.
Active Publication Date: 2020-06-19
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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[0009] The purpose of the present invention is to provide a parametric deformation method for the opening of the finite element model of the energy-absorbing module, which solves the problem in the prior art that the optimization process of the opening size deformation of the energy-absorbing module is complicated and needs to be switched between different data models
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[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the invention, not to limit the invention.
[0061] CAE refers to computer-aided engineering in engineering design, which refers to the use of computer-aided solutions to analyze the structural mechanical properties of complex projects and products, and to optimize structural performance. As a combination of regular units, the physical properties of the actual structure can be replaced by the analysis of the actual structure by analyzing the discrete body to obtain an approximate result that meets the engineering accuracy. This can solve many complex problems that need to be solved in actual engineering but cannot be solved by theoretical analysis. question....
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The invention relates to the field of automobile computer aided design, in particular to an energy absorption module finite element model trepanning parameterization deformation method which comprisesthe steps: 1, importing a finite element model of an energy absorption module; step 2, generating a totally-enclosed triangular shell unit according to the outer surface of the finite element model;3, deleting tetrahedron units of the finite element model, and reserving material model attributes; step 4, establishing a two-dimensional grid deformation control block on the shell unit in the opening area; step 5, moving nodes of the two-dimensional grid deformation control block; step 6, carrying out grid reconstruction on the triangular shell units; step 7, generating a new tetrahedron unit by the reconstructed triangular shell unit, and endowing the original material model with attributes; and step 8, deleting the reconstructed triangular shell units. Parameterization change of the opening size of the finite element model of the energy absorption module is achieved, the finite element models with different opening sizes are rapidly generated, the development period is shortened, andthe development cost is reduced.
Description
technical field [0001] The invention relates to the field of automobile computer-aided design, and more specifically relates to a parametric deformation method, medium and system for opening a finite element model of an energy-absorbing module. Background technique [0002] Pedestrians are a vulnerable group of road users and belong to the high-risk group in traffic accidents. In a vehicle-pedestrian collision accident, the vehicle hits the leg of the pedestrian, resulting in injury to the lower limbs. figure 1 A schematic diagram of the structure of the front end of the car in the prior art is disclosed, such as figure 1 As shown, in order to improve the pedestrian protection calf collision performance of the vehicle, it is often necessary to add an energy-absorbing module 2 in the gap between the bumper skin 3 and the front beam assembly 1, and the energy-absorbing module 2 can be an energy-absorbing foam. [0003] In addition, national regulations require that front-end...
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IPC IPC(8): G06F30/23
Inventor 张继游解跃青乔淑平吴峻岭连志斌
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD