城市轨道车挡防撞液压缓冲系统仿真研究

Simulation Research on Hydraulic Buffer System of Urban Railway Vehicle’s Anti-collision

针对城市轨道失控车辆在轨道终端产生的撞击动能问题,采用液压缓冲油缸车挡防撞装置进行动能吸收,提出一种城市轨道车挡防撞液压缓冲系统,对城市轨道车挡防撞液压缓冲系统工作原理进行了研究,利用AMESim对车挡防撞液压缓冲系统仿真模型进行了搭建,对系统动态性能开展了仿真分析,并仿真研究了失控车辆质量、溢流阀开启压力对系统性能的影响情况,进一步归纳计算了系统吸能率,最后分析了控制车辆缓冲制动位移措施。研究结果表明:城市轨道车挡防撞液压缓冲系统对失控车辆实现了匀减速制动;车挡防撞液压缓冲系统吸能率可达到95%以上;失控质量增大,系统吸能率先减小后增大;溢流阀开启压力增大,系统吸能率也增大;增大溢流阀开启压力、缓冲油缸活塞有效面积可缩短车辆缓冲制动位移。

Aiming at the problem of impact kinetic energy produced by runaway vehicles on urban rail at the rail terminal,the hydraulic cushion cylinder vehicle's anti-collision device was used to absorb the kinetic energy.A hydraulic buffer system of urban railway vehicle's anti-collision was proposed.The working principle of hydraulic buffer system of urban railway vehicle's anti-collision was studied.The simulation model of hydraulic buffer system was built based on AMESim.The performance curves of the system were analyzed and researched,and the effects of the runaway vehicle mass and the relief valve opening pressure on the performance of the system were simulated and studied.The energy absorption rate of the system was further calculated.Finally,the measures to control the vehicle buffer braking displacement were analyzed.The research results show that the anti-collision hydraulic buffer system of urban rail vehicle achieves uniform deceleration braking for out-of-control vehicles,the energy absorption rate of the hydraulic cushion system can reach more than 95%,with the increase of runaway vehicle mass,the energy absorption of the system decreases first and then increases,when the relief valve opening pressure increases,the energy absorption rate of the system also increases.Increasing the opening pressure of relief valve and the effective area of buffer cylinder piston can shorten the vehicle buffer braking displacement.