基于C-NCAP五星碰撞的主体铝制纯电动车正碰车身框架结构设计

论文针对纯电动车与传统燃油车在造型和布置上的差异化特点带来的车身正碰框架中的设计难点和痛点,提出了一套完整、可行且有效的主体铝制量产正碰车身框架结构设计方法,此方法专门针对纯电动布置进行实体建模和正碰工况下的拓补优化设计,制定正碰主体铝材料结构设计方案,以实现吸能效率的提升,保障乘员舱的安全可靠性,同时兼顾轻量化和共线约束。基于CAE和试验验证结果,此设计车身各正碰指标均满足C-NCAP五星碰撞结构要求,比对ODB下的整车乘员伤害得分也满足相关要求,说明其可行有效性,为同类型车型的开发提供参考和指导。

Structural design for frontal impact body frame of main aluminum pure electric vehicle achieving C-NCAP five-star safety requests

In view of the design difficulties and pain points in the front impact frame caused by the differences in styling and layout between pure electric vehicles and traditional fuel vehicles,a set of complete,feasible and effective design methods for the front impact frame structure of the main aluminum mass production are put forward.This method is specially designed for the solid modeling of the pure electric layout and extension optimization design under the front impact condition,to formulate the front impact main aluminum material structure design scheme,so as to improve the energy absorption efficiency,ensure the safety and reliability of the passenger compartment,and take into account the lightweight and collinear constraints.Based on CAE and experimental verification results,all the frontal impact indexes meet the structure requirements of C-NCAP five-star collision,and compared with ODB,the whole car occupant injury score also meets the relevant requirements,which shows its feasibility and effectiveness,and provides reference and guidance for the development of the same type of car.