关键词: 侧面碰撞工况；SC-MDB；AC-MDB；结构耐撞性

Abstract: China-new car assessment programme and vehicle insurance index both has been launched suitable for China-moving deformable barrier (SC-MDB) and advanced Chinese-moving deformable barrier (AC-MDB). In this paper, the structural characteristics of the new and old side impact barriers, the difference of aluminum honeycomb parameters and impact energy are compared, and the compression deformation of different barriers is analyzed by simulation. The impact of different barriers on the crashworthiness design of the side structure of the body is analyzed by using the collision model of a vehicle. Aiming at the problem of increased intrusion of B-pillar and front and rear doors caused by the side impact condition of the new version of SC-MDB and AC-MDB, by improving the force transmission path of the seat beam of the body, increasing the strength of the threshold, B-pillar and door anti-collision rod and other structures, the intrusion deformation of the side impact body is reduced, and the structural optimization design method of the side impact condition of the new version is provided. The simulation results verify the effectiveness of the optimization method, and provide optimization ideas and references for the structural crashworthiness design of similar vehicles.

Key words: Side impact conditions; SC-MDB; AC-MDB; Structure crashworthiness