制动缸排气响应及过程对重载列车纵向力影响研究

Study on the Effect of Brake Cylinder Exhaust Response and Processes on Longitudinal Force of Heavy Haul Train

重载列车在运行过程中途经长大坡道会产生较大的车钩力,从列车运行情况来看,目前2万t列车大车钩力主要发生于列车缓解时。文章从车辆间制动缸排气响应以及制动缸排气速率两方面进行了仿真研究,探究了两者与纵向力之间的关系。结果表明:随着缓解波速从150 m/s增加到200 m/s,列车缓解产生的最大纵向力下降11%;制动缸排气时间从5.3 s增加到30.0 s,列车缓解产生的最大纵向力降低59%,适当增加制动缸排气时间,对减小列车缓解时的车钩力有所帮助。

Heavy haul trains pass through long ramps during operation,which will generate large forces on the coupler,and from the train operation,the current 20,000-ton train large coupler force mainly occurs when the train is released.A simulation study is conducted in terms of the inter-vehicle brake cylinder exhaust response and the brake cylinder exhaust rate to investigate the relationship between the two and the longitudinal force.The results show that the maximum longitudinal force generated by train releasing decreases by 11%with the increase of release wave speed from 150 m/s to 200 m/s;the maximum longitudinal force generated by train releasing decreases by 59%with the increase of brake cylinder exhaust time from 5.3 s to 30.0 s.Appropriately increasing the exhaust time of brake cylinders is helpful to reduce the coupler force during train releasing.