汽车前部部件的碰撞吸能能力分析

Energy Absorption Analysis of Vehicle Front Part in Crash

汽车前部碰撞吸能区承担着主要的吸能缓冲的责任,对车内乘员的保护有重要作用,为提高其碰撞吸能能力,文章使用整车有限元模型,在LS-DYNA环境当中进行整车碰撞有限元分析。确定了FEMB前处理当中关键步骤及参数的确定,为进行有限元分析提供了方法依据。通过研究汽车正面碰撞过程中整车的运动状态及前部各吸能部件的吸能情况,得出:前部组件共吸收能量占整车吸收能量的47.74%,汽车前纵梁共吸收能量占整车吸收总能量的18.52%。故前纵梁组件为碰撞吸能的主要部件,为提高汽车安全性能分析提供了方向。

Vehicle front energy absorption part bears the main responsibility for absorbing energy,it plays a very important role during the crash and is the key part to improve the safety of the occupant. The whole vehicle front crash can be simulated with software LS-DYNA. This paper introduces how to define the key procedures and parameters in FEMB, and provides foundation for finite element analysis. Studying the whole vehicle＇s motion state and the status of front energy-absorbing parts to reach a conclusion that the front assembly takes about 47.74% of total energy absorption, and the front beam takes about 18.52% of total energy absorption. The front longitudinal beam is the most important energy-absorbing part in the crash, providing the guidance for vehicle safety performance improvement.