混凝土桥梁护栏的汽车碰撞有限元模拟及分析

摘要

从护栏与汽车的接触角度入手,用计算机仿真的方法系统研究混凝土桥梁护栏的汽车碰撞问题.以数值分析软件LS-DYNA为平台,构建了护栏–汽车的有限元模型,模拟再现混凝土护栏的汽车碰撞过程,从碰撞形态、碰撞速度等角度分析有限元计算结果,通过改变不同的仿真参数(碰撞条件),研究碰撞中的汽车动态响应和护栏的碰撞特性.%In this paper, from the angle of the contact angle between the rail and the vehicle, the vehicle collision problem of the concrete bridge barrier is studied by computer simulation. Using LS-DYNA finite element analysis software to establish the simulation model of concrete bridge guardrail and vehicle collision, and from the collision shape, impact velocity and angle analysis the finite element simulation model, several important conclusions are obtained by changing simulation parameters of the different collision conditions, in-depth study of the collision car dynamic response and guardrail crash characteristics.