客车与半刚性双波梁护栏碰撞过程的研究

1)深圳大学机电与控制工程学院,深圳518060; 2)华南理工大学机械与汽车工程学院,广州510640

结构力学; 客车碰撞; 半刚性双波梁护栏; 道路交通事故; 行驶轨迹; 生存空间

Collision process between coach and semi-rigid dual-wave barrier
Wang Jinlun1, Zhou Yunjiao2, and Lan Fengchong2

Wang Jinlun1, Zhou Yunjiao2, and Lan Fengchong21)College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, P.R.China2)School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, P.R.China

structural mechanics; coach collision; semi-rigid dual-wave barrier; road accident; traveling trace; survival space

DOI: 10.3724/SP.J.1249.2015.03324

备注

针对高速公路上客车与路侧防护栏的碰撞问题,建立某大型客车有限元模型和常见现行道路上的Q235双波梁钢护栏的有限元模型,采用Dyna求解器,研究车速为80 km/h、碰撞角为20°时,客车-护栏碰撞系统的动态响应过程. 结果表明,双波梁护栏对客车的防护作用较差,虽可在一定程度上校正失控车辆,但客车最终会跨越护栏; 客车前下端变形严重,但不会侵入乘员生存空间; 护栏在碰撞过程中吸收的内能占车辆初始总动能的50%以上,可有效减缓汽车速度,降低道路交通事故的严重程度.

Finite element models of a large coach and Q235 dual-wave beam barrier normally utilized on highway are established to investigate the coach-barrier collision process. The LS-DYNA solver is used to simulate the dynamic response process with a coach speed of 80 km/h and a collision angle of 20°. The results show that the protective effect of the dual-wave barrier on the coach is poor. Although the loss of control of the coach could be corrected to a certain extent, the coach would still run across the barrier eventually. Even though serious deformation at the front-lower end of the coach is observed, the occupant survival space is not invaded. The barrier absorbs more than half of the initial kinetic energy of the vehicle during a collision, which can effectively decrease the coach velocity and reduce the severity of road accidents.

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