关键词: 耐撞性, 拓扑优化, 非线性, 显式有限元法

Abstract:

This paper discussed the crashworthiness topology optimization method based on LS-DYNA explicit FEM, and presented the mathematical model of iterative solution. Combined with this method, parallel topology optimization was used in the vehicle's threshold beams based on the 40% offset and side impact collisions, and according to the optimized material distribution, product structure will give the engineering interpretations. Results of the engineering interpretations were verified in the finite element model of vehicle collisions. The results show that: the crashworthiness topology optimization method is effective, and the results of topology optimization improve the vehicle crash performance.

Key words: crashworthiness, topology optimization, nonlinearity, explicit FEM