关键词: 40%偏置碰撞；X 向充分压溃；Y 向折弯；生存空间；结构优化

Abstract: In the development of 40% offset collision simulation of the whole vehicle, in view of the existing method of increasing the strength of sheet metal to achieve structural safety, this paper proposes a structural optimization scheme to improve the collapse mode of the front longitudinal beam. Through the X-direction deformation of the left front longitudinal beam, the first-level collapse becomes the second-level collapse, which achieves the purpose of fully crushing and absorbing energy. In addition, an inductive rib is applied to the left front longitudinal beam to bend it in the Y-direction to increase the Y-direction energy absorption of the body structure and further reduce the collision energy absorbed by the vehicle in the X-direction. After structural enhancement and optimization based on the benchmark simulation model and comparison, the living space of the passenger compartment increased by about 20%, and the deformation of the A-pillar and the seat beam were improved. This kind of structural optimization scheme can be used as an optimization idea in the development of different degrees of offset collision.

Key words: 40% offset collision; Fully crushed in the X direction; Bend in the Y-direction; Living space; Structural optimization