轿车热冲压保险杠的柱类碰撞耐撞性-中国腐蚀与防护学报.PDF

ISSN 1674-8484 汽车安全与节能学报, 2015 年, 第6 卷 第2 期 04/ 13 CN 11-5904/U J Automotive Safety and Energy, 2015, Vol. 6 No. 2 134 — 138 轿车热冲压保险杠的柱类碰撞耐撞性 林建平 ，舒常乐 ，金建伟 ，王  灿 ，王晓娜 ，姚再起1 1 2 1 2 2 （1. 同济大学，机械与能源工程学院，上海201804 ，中国； 2. 吉利汽车研究院，杭州311228，中国） 摘  要： 研究了汽车前保险杠与柱类物(如电线杆或大树的垂直硬物)耐碰撞性能。为降低保险杠的 质量，某轿车采用了超高强度热冲压含硼钢。针对该类保险杠进行了落锤试验。用有限元模型进行了 柱碰性能模拟，并分析了不同板厚的前保险杠耐撞性。选取了前保险杠的变形、受力及吸能3 个参 量作为柱碰过程的评判指标。结果表明：柱类碰撞时，对比原冷冲压保险杠，热冲保险杠的最大内 侵量减小40 mm，最大承载力提高7 kN，最终吸能量提高0.1 kJ。因而，热冲压保险杠具有更加优异 的柱碰性能。 关键词： 汽车安全；柱类碰撞；耐撞性；热冲压；保险杠 中图分类号： U 469.91 文献标识码： A DOI: 10.3969/j.issn.1674-8484.2015.02.004 Pole impact crashworthiness of hot stamping front bumper of a car 1 1 2 1 2 2 LIN Jianping , SHU Changle , JIN Jianwei , WANG Can , WANG Xiaona , YAO Zaiqi （1. Tongji University, School of Mechanical Engineering, Shanghai 201804, China; 2. Geely Automobile Research Institute, Hangzhou 311228, China ） Abstract: The impact crashworthiness between front-bumper and pillars (such as telegraph poles or trees) was investigated. Some drop hammer impact tests were done for a car with its front-bumper being built from ultra-high-strength hot-stamping boron-steel to reduce the bumper mass. The impact crashworthiness were simulated and analyzed for the bumper with different thickness by a special finite element model with the deformations, the stresses, and the energy absorption conditions of a front-bumper being taken as evaluation indexes. The results show that the front-bumper using ultra-high-strength hot-s