Abstract: The study of multidimensional optimization B-pillar aims to deal with the problems of complex, high probability and high risk side impact in actual road. Based on the interpretation of relevant regulations and standards of passive safety about side impact in China, the requirements and characteristics of working conditions are summarized, to conclude the characteristic of B-pillar design in side impact, and come up with the design idea of B-pillar deformation mode. Combined with the actual development case of an sport utility vehicle (SUV) mode, the B-pillar compatibility is designed considering all the requirements of side working conditions, proposed an economical and effective design plans with validated. The design idea can provide reference for the design of B-pillar structure to other vehicles.

Key words: Side impact; Deformation mode; Automobile B-pillar; SUV; Structure design

摘要： 文章旨在对汽车 B 柱结构多维度优化设计，应对实际道路中侧面碰撞工况复杂、发生 概率高和风险大的问题。通过解读国内现行被动安全侧面碰撞相关法规标准，归纳各工况要 求及特点，总结各侧面碰撞 B 柱设计要点，提出 B 柱变形模式设计思路。结合某运动型多用 途汽车（SUV）车型实际开发案例，综合考虑所有侧面工况要求设计 B 柱兼容性，提出经济 有效的设计方案并分析验证全面有效。该设计方案可为后续车型 B 柱结构设计开发提供参考。

关键词: 侧面碰撞；变形模式；汽车 B 柱；SUV；结构设计