货物非均匀装载对高速货运动车组动力学性能的影响

Effect of Non-uniform Freight Distribution on Dynamic Performance of High-speed Freight EMUs

为改变我国现有的物流格局,有效利用我国庞大的高速铁路路网资源,充分发挥我国高速铁路的效能,开行高速货运动车组列车无疑是铁路货运发展的一种新途径。为深入研究货物装载差异引起的载荷不均匀分布对高速货运动车组列车动力学性能的影响,以我国CRH某型动车组为研究对象,建立了八节编组的高速货运动车组列车系统动力学模型。通过设置不同的货物装载质量分布情况,分析相应工况下的高速货运车辆运行安全性、车辆运行平稳性、车辆与轨道动态作用性能。研究结果表明,在惰行、牵引和制动时,均匀分布的满载高速货运动车组比轻载的脱轨系数、轮重减载率小,安全性好。总体而言,货物质量均匀分布有利于提高高速货运动车组列车动力学性能。

In order to change the logistics pattern of China, and to effectively utilize the vast high-speed railway transportation resources of China, and to give full play to the efficiency of China’s high-speed railway, operation of freight electrical multiple unit(EMU) trains is undoubtedly a new way for railway freight development. In order to deeply understand the influence of non-uniformly distributed loading due to cargo loading difference on the train dynamics performance, a dynamics model of China railway high-speed EMU train was established in this paper. Different cargo loading distribution cases were considered, and the train operation safety, stability and wheel-rail dynamic interaction performance of high-speed freight EMU are analyzed. The research results show that for all the idling, traction or braking conditions, the evenly distributed full load of high-speed freight EMU has smaller derailment coefficient and wheel unloading rate than those of the light load conditions, which indicates a better safety. Generally speaking, uniform distribution of cargo quality is beneficial to improving high-speed freight EMU train dynamics performance.