轿车车顶压溃仿真与结构耐撞性研究  

Research on Roof Crush Simulation and Structural Crashworthiness of Passenger Car

作　　者：潘锋[1] 朱平[1] 章斯亮[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《中国公路学报》2010年第3期108-114,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50875164)

摘　　要：参照美国FMVSS 216和SAE J996标准,对某轿车车顶进行了准静态压溃和整车跌落的仿真研究,提出了准静态压溃和整车跌落下的车顶强度评价方法,分析了车顶作用力与压溃深度的关系以及整车应力分布情况,并对主要力承载结构进行耐撞性研究,提出基于碰撞吸能的改进方案。结果表明:改进后车顶抗变形能力提高了24%,车顶最大变形量减小了34 mm,并且零件质量减轻3.45 kg,该仿真方法为开展车顶强度方面的研究提供了借鉴。A comprehensive numerical analysis of roof quasi-static crush and vehicle inverted drop for passenger car was introduced under crushing regulation FMVSS 216 and SAE J996 standard.The evaluation methodology for roof strength under quasi-static crush and inverted drop was brought forward.The relationship between impact force of roof and crush deformation and stress distributions of the car were analyzed.Research on structural crashworthiness to the main load-carrying structures was carried out and optimal project based on energy absorption during impact was put forward.The result shows that roof strength is improved by 24% and the maximum deformation of roof structures is decreased by 34 mm while the weight of modified structures can be reduced by 3.45 kg.The methodology can be used for reference to studies of roof strength.

关 键 词：汽车工程 结构耐撞性 仿真分析 车顶强度 车顶准静态压溃 整车跌落 

分 类 号：U463.821[机械工程—车辆工程]