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根据轨道车辆电空复合制动的工作原理,以全车制动系统为研究对象,一动一拖制动控制单元为研究载体,基于多学科协同分析方法,建立了控制子系统、气制动子系统、电制动子系统与制动执行子系统模型,基于各子系统之间的关联参数,搭建了制动系统的联合仿真平台;根据广佛二期车辆的实际参数,模拟列车电制动失效工况下常用全制动的运行工况,计算了空走时间、制动时间、制动距离、制动减速度、瞬时速度、平均减速度、纵向冲动、车钩力、利用黏着系数与制动缸压力,并与试验结果进行了对比,以验证集成化仿真平台的可行性和有效性。仿真和试验结果表明:在制动稳定后,仿真和试验的列车制动减速度约为1.25m·s~(-2),仿真的平均减速度约为1.05m·s~(-2),试验的平均减速度约为1.09m·s~(-2),误差较小,且均符合常用全制动的平均减速度不小于1.0m·s~(-2)的要求;在常用全制动工况下,采取等磨耗制动力分配的动、拖车利用黏着系数不同,动车约为0.13,拖车约为0.12,但都未超过0.16的最大可利用黏着系数的限制;虽然动、拖车的质量不同,但等磨耗工况下施加常用全纯空气制动后,试验和仿真的动、拖车的制动缸压力均相等,约为420kPa。由此可见,可利用基于多学科协同分析的联合仿真平台对轨道车辆制动系统进行车辆级的研究,为制动系统的开发和设计优化提供理论依据。
According to the working principle of electro-pneumatic compound brake of rail vehicle, the whole vehicle brake system is taken as the research object. The one-and-a-drag brake control unit is used as research carrier. Based on multidisciplinary collaborative analysis method, the control subsystem, System, electronic brake subsystem and brake execution subsystem model. Based on the related parameters of each subsystem, a joint simulation platform of brake system is built. According to the actual parameters of the second phase of the vehicle in Guangzhou and Foshan, the simulation of train electric brake In the failure condition, the running condition of the full brake is used to calculate the running time, the braking time, the braking distance, the braking deceleration, the instantaneous speed, the average deceleration, the longitudinal impulse, the hook force, Cylinder pressure, and compared with the test results to verify the feasibility and effectiveness of integrated simulation platform. Simulation and test results show that the braking deceleration of the train is about 1.25m · s ~ (-2) after the braking is stabilized, and the average deceleration of the simulation is about 1.05m · s ~ (-2) The average deceleration of the test is about 1.09m · s ~ (-2), the error is small, and all meet the requirements of the average deceleration of common full brake not less than 1.0m · s ~ (-2) Under dynamic conditions, the dynamic and trailer utilization of dynamic and trailer distribution with different worn-out tractors utilized about 0.13 for trailers and 0.12 for trailers, all of which did not exceed the maximum available adhesion coefficient of 0.16; However, after applying common pure air air brakes under different wear conditions, the pressures of the brake cylinders of the tested and simulated trailers and the trailer are all equal to about 420 kPa. Thus, we can use the co-simulation platform based on multidisciplinary collaborative analysis of vehicle-based research on the rail vehicle braking system for the brake system development and design optimization provides a theoretical basis.