基于LS-DYNA的车辆与道路中央护栏碰撞仿真研究

Simulation Study on Collision between Vehicle and Road Central Guardrail Based on LS-DYNA

通过对车辆在相同行驶初速度下,以不同角度与两种常见形式护栏进行的碰撞仿真实验,观察不同情况下车身主要碰撞部件形变情况和护栏损毁情况。利用HyperMesh进行模型的建立以及参数设置,使用Ls-Dyna运算求解,并通过HyperView对结果进行后处理、查看并分析。得出如下结论:与矩形管护栏相比,m型护栏在碰撞过程中对车辆的拦阻和保护效果更好,碰撞后无碎片散射,对对向车道行车安全影响更小。

At the same initial speed,a collision simulation experiment is carried out with different angles and different guardrails, to observe the deformation of main crash parts and guardrail damage under different conditions.Use Hypermesh to model and set up parameters,use Ls-Dyna to solve operations,and Hyperview for post-processing,view and analyze the results.Conclusions are drawn as follows: compared with the rectangular tube guardrail,the m guardrail has a better effect on blocking and protection of the vehicle in collision process.There is no debris scattering after the collision,and it has less impact on traffic safety of the lane.