关键词: 无框车门；B 柱结构；车身轻量化；侧面碰撞

Abstract: For the design of vehicle body and after-sales, collision safety of vehicle is a very critical factor, with the development of electric vehicle industry, the application of frameless door is more and more in recent years, that undoubtedly poses a greater challenge to the safety of the side impact of the vehicle. The exploration aims at safety and lightweight, the study proposes a structure design of B-pillar for side impact safety of vehicle with frameless doors, to solve the problem of low score of side impact of B-pillar of frameless door models. Through the interpretation of C-IASI evaluation criteria, requirements and characteristics of side impact conditions are summarized, to conclude the key points of side impact B-pillar design. Combined with the actual development case of a frameless door model, develop design solutions that balance lightweight and safety, the design structure can provide reference for the subsequent design of B-pillar structure of other frameless door vehicles.

Key words: Frameless door; Structure of B-pillar; Lightweight of body; Side impact