2万t列车制动减压量对列车纵向动力学性能影响研究

Study on the Influence of Braking Reduction on the Longitudinal Dynamic Performance of 20,000-Ton Heavy Haul Train

为了确保2万t列车的安全运行及重载运输任务的完成,针对2万t列车在长大坡道循环制动缓解时同步性较差以及缓解后产生拉钩力较大等问题,本文使用列车空气制动与纵向动力学联合仿真系统(TABLDSS),比较不同制动减压量下列车制动及缓解的同步性及长大下坡道一次制动缓解产生的最大拉钩力。仿真结果表明:从列车制动同步性看,常用制动下不同制动减压量列车制动的同步性差异不大。从列车缓解同步性看,常用制动下制动减压量对于列车缓解同步性的影响较为明显,列车缓解同步性随减压量的增大而提高。从列车最大拉钩力看,列车最大拉钩力随制动减压量的增大而显著增大,由减压50 kPa分别增至60 kPa、70 kPa后,列车最大拉钩力分别增大了20.8%和27.8%。

In order to ensure the safe operation of the 20,000-ton heavy haul train and the completion of heavy-duty transportation tasks based on the problem of the poor synchronization property and the large tensile coupler force occurred in the cycling brake and release when the 20,000-ton heavy haul train is on the long and steep rampway, the Train Air Brake and Longitudinal Dynamics Simulation System (TABLDSS) is used to compare the synchronization property of brake and release under the different braking reduction and the maximum tensile coupler force occurred in the once brake and release when the train is on the long and steep rampway is also explored. The simulation results show that: from the brake synchronization property, the influence of the amount of braking reduction on the brake synchronization property can be neglected under common braking. From the release synchronization property, the amount of braking reduction has a greater impact on the release synchronization property under common braking. The release synchronization property improves with the increasing braking reduction. With the increase of the amount of braking reduction, the tensile coupler force increases significantly, compared with 50 kPa, the maximum tensile coupler force of the 60 kPa and 70 kPa increased by 20.8% and 27.8% respectively.