关键词: MPDB；兼容性；ODB；指标优化；车身刚度

Abstract: In the 2021 version of the China-new car assessment programme (C-NCAP) evaluation charter, the frontal 50% overlapped moving progressively deformable barrier (MPDB) crash test replaced the original frontal 40% overlapped deformable barrier (ODB) crash test, and was proposed for the first time the requirements for the assessment of vehicle crash compatibility indicators have been met. In order to ensure that the vehicle crash compatibility index meets the requirements in the detailed design stage, it is necessary to carry out a crash compatibility optimization analysis on the vehicle. In this paper, the finite element crash simulation modeling and MPDB working condition analysis of a medium-sized sport utility vehicle (SUV) are firstly carried out, and a crash compatibility optimization scheme is proposed, and finally the computer aided engineering (CAE) comparison and verification are carried out. The results show that by increasing the effective contact area between the front end of the vehicle and the barrier and matching the body stiffness, the compatibility penalty of the whole vehicle can be greatly reduced, and it also provides a reference for the design and development of subsequent new cars.

Key words: MPDB; Compatibility; ODB; Index optimization; Body stiffness