High-order and Low-order Coupled Simulation Method for Automotive Collision and Development of a Realistic Simulation Platform

doi:10.3901/JME.260195

Abstract

Abstract: FEM(Finite Element Method) is widely used in industrial fields such as automotive and defense. However, under complex scenarios like vehicle collisions, FEM is subject to notable constraints because of computational resource limitations. Considering the drawbacks of the low efficiency of FEM and the difficulty to simulate the motion over the entire duration and learn about the simulation results immersively, a realistic simulation platform for the case of vehicle collision is developed based on the high-order and low-order coupled simulation method. After comprehensive measurement of the efficiency and accuracy of the simulation, the physical simulation method is developed for non-collision scenarios in automotive applications, which is combined with traditional FEM to simulate the entire course of vehicle motion. And the presentation of realistic simulation results is realized by the coupling of the simulation and scene data and the realistic simulation platform is developed successfully. In addition, the vehicle collision is simulated to verify the method of coupled simulation and computing performance of the platform with the FEM. The results demonstrate that the simulation outputs, such as velocity, are consistent with the FEM and the calculation time is reduced to 0.35% of the FEM at the stage of physical simulation. The difference of the increment of internal energy between the simulation platform and FEM is 1.10%, and the difference of acceleration maximum is 3.51% and the total calculation time is reduced to 21.01% of the FEM when focusing on the large deformation. In terms of visualization, the realistic simulation platform is highly immersive, offering a more intuitive means of visualizing and improving the efficiency of understanding and analyzing simulation data. The feasibility of the simulation platform in the industrial application is verified through the automotive collision case, and the platform proves to be more efficient and practical for automotive collision scenarios than FEM software.

Key words: simulation platform, finite element method, physical simulation, realistic rendering, coupled simulation

CLC Number:

U461

LI Lincong, WANG Shengquan, ZENG Xiang, CAI Yong, HE Xiaowei. High-order and Low-order Coupled Simulation Method for Automotive Collision and Development of a Realistic Simulation Platform[J]. Journal of Mechanical Engineering, 2025, 62(6): 314-324.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260195

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