基于LS-DYNA的车辆与临时防护设施碰撞仿真

Research on collision simulation of vehicle and temporary protection facilities based on LS-DYNA

为研究不同交通防护设施,尤其是临时防护设施的防护效果,选取波形梁护栏、混凝土护栏和注水防撞墩为研究对象,建立了车辆碰撞系统的有限元模型。采用求解器LS-DYNA求解模型,比较分析了不同防护设施的防护效果。研究结果表明:波形梁护栏在吸收碰撞能量方面的性能较好,混凝土护栏在防止车辆越出道路方面具有优势,而注水防撞墩在吸收碰撞能量方面的性能比波形梁护栏的稍差,但其变形量较小。最后,就它们各自不同的特性分析了对应的适应场景。

In order to study the protective effect of different traffic protection facilities,especially temporary protection facilities,the wave beam guardrail,concrete fence and water injection anti-collision pier were selected as the research object and the finite element model of vehicle collision system is established.The solver LS-DYNA is used to solve the model.The protective effects of different protective equipments are analysized.The results show that wave beam guardrail is better in absorbing collision energy,the concrete fence has an advantage in preventing the vehicle from crossing the road and the water injection anti-collision pier is slightly worse than the wave beam barrier in absorbing the impact energy,but its deformation is small.At last,their respective model adaptabillity based on their different characteristics is analyzed.