正面100%碰撞车体仿真结构动力响应分析  

Dynamic Response Analysis of Front 100% Collision Car Body Simulation Structure

作　　者：张永勤 张维军[1] 孙国君[1] 刘庆丰 周文海 杜超飞 Zhang Yongqin;Zhang Weijun;Sun Guojun;Liu Qingfeng;Zhou Wenhai;Du Chaofei(Lanzhou Petrochemical Polytechnic,Lanzhou 730050,China;School of Petrochemical Technology,LanzhouUniversity of Technology,Lanzhou 730050,China;Faculty of Engineering,China University of Geosciences,Wuhan430074,China)

机构地区：[1]兰州石化职业技术学院,兰州730060 [2]兰州理工大学石油化工学院,兰州730050 [3]中国地质大学工程学院,武汉430074

出　　处：《汽车文摘》2019年第5期44-49,共6页Automotive Digest

基　　金：国家自然科学基金(51076061);甘肃省自然科学基金(B061707)

摘　　要：为了分析在不同车速行驶下,碰撞对车辆引起的损害,通过ANSYS/LS-DYNA软件对5种不同车速进行100%正碰模拟,分别在防撞梁、引擎盖与挡风玻璃接触处以及挡风玻璃3处选取代表单元,提取有效应力时程曲线进行对比分析,发现引擎盖与挡风玻璃连接处容易出现应力集中,防撞梁有效应力峰值随时间的增大而增大。速度在一定范围内,达到60 km/h时,由于速度过快,应力传递到挡风玻璃处较小。In order to analyze the impact of different speeds on vehicle damage,100%frontal impact simulation of 5 different speeds was carried out by ANSYS/LS-DYNA.The effective stress time-history curves were extracted from the 3 representative units of bumper beam,engine cover and windshield contact and windshield respectively.It is found that the stress concentration is easy to occur at the joint between the hood and the windshield,and the effective stress peak of the bumper beam increases with time.The speed is within a certain range.When the speed reaches 60 km/h in a certain range,the stress transferred to the windshield is small because of the high speed.

关 键 词：正面碰撞 车速 有效应力 应力云图 

分 类 号：U467.14[机械工程—车辆工程]