乘用车内部凸出物碰撞安全性能研究

Collision Safety Performance Study of the Interior Fittings of Passenger Car

为提升某乘用车型仪表板和中控箱系统的碰撞吸能性,搭建了适用于LS-DYNA求解器的有限元仿真分析模型。基于达朗贝尔动力学原理推导了碰撞加速度计算公式,分别从金属支架结构形式、内饰造型以及内饰零件刚度角度进行碰撞加速度优化。仿真和试验结果表明,优化后的仪表板和中控箱系统碰撞加速度明显降低,吸能性满足国家标准要求。

In order to improve the collision energy absorption of dashboard and central control box system of a passenger car,a finite element simulation analysis model for LS-DYNA solver is built.Based on the dynamics principle of Darren Bell,the calculation formula of impact acceleration is deduced,and the optimization of impact acceleration is carried out from the structure pattern of metal bracket,the interior styling and the stiffness of interior parts.The simulation and test results show that the collision acceleration of the optimized dashboard and central control box system is significantly reduced,and the energy absorption meets the requirements of national standards.