Abstract: As an important evaluation index of vehicle safety performance, pedestrian protection safety has been paid more and more attention by the automotive industry and consumers. As a decisive part of leg safety in pedestrian protection, the design of pedestrian protection beam is particularly important. According to the five-star requirements of C-NCAP 2021, the scoring standard of pedestrian protection has become more stringent, so it is imperative to design a pedestrian protection beam that meets the requirements. This paper reports the current situation of pedestrian protection beams, studies the design of common pedestrian protection beams, and puts forward the shortcomings of the current design. At the same time, combined with a newly developed vehicle, a new design scheme meeting the requirements of five-star collision is proposed. The wave structure is used to increase the deformation space of pedestrian legs and improve the leg protection score. The stability of the structure is verified by computer aided engineering (CAE) simulation and experimental verification.

Key words: Pedestrian protection safety; Pedestrian protection beam; C-NCAP 2021; Wave typestructure; Vehicle safety

摘要： 行人保护安全作为汽车安全性能的一项重要评价指标，越来越受到汽车行业及广大消 费者的重视。而行人保护横梁作为对行人腿部安全起决定性作用的零件，设计显得尤为重要。 根据 C-NCAP 2021 五星碰撞要求，行人保护的评分标准变得更加严苛，所以设计一种满足要 求的行人保护横梁势在必行。报告了目前行人保护横梁的现状，对常用的行人保护横梁的设 计进行了研究，提出了当前设计的不足之处。同时结合一款新开发车型，提出了一种满足五 星碰撞要求的新型设计方案，利用波浪型结构增大了行人腿部变形空间，提高了腿部得分， 并且通过计算机辅助工程（CAE）模拟仿真和试验验证，验证了该结构的稳定性。

关键词: 行人保护安全；行人保护横梁；C-NCAP 2021；波浪型结构；汽车安全