摘要
为了减小重载列车因制动及缓解不同步而造成的纵向冲动,研究制动特性对纵向冲动的影响,根据线路试验实测数据分析了单编万吨列车在常用制动及缓解工况下的试验特性.结果表明:单编万吨列车减压50 kPa常用制动时制动波速为163 m/s,减压100 kPa常用制动时制动波速为202 m/s.列车在制动过程中,制动作用沿列车长度方向具有制动起始时间的不同时性和制动缸升压速度的不均匀性.单编万吨列车常用制动不论制动减压量多少,随着车辆序号的增大,勾贝伸出时间均变长,列车管减压量越大,则制动缸勾贝伸出越早,首尾车开始制动的时间差越小,即平均制动波速越高.缓解工况时各车位从列车管开始充气到制动缸开始排气存在一定的时间差,所以列车管开始充气一段时间后列车管缓解曲线才出现明显的尖峰,加速缓解风缸才开始发挥"局部增压"的作用.
In order to reduce the heavy haul train longitudinal impulse caused by braking and releasing asynchronism and improve brake propagation speed and releasing propagation speed, line experiment analysis is conducfed according to field test data of the single ton train experiment features of braking and releasing. The results demonstrate that the brake propagation is not propagating at a constant speed but rather slowly first and then faster. The more the train brake pipe pressure reduction ,the shorter end to the end car starts braking time is, that is, the higher average braking propagation speed. When the train traveling in the downhill road, the maximum train coupler forces occurr in brake releasing conditions and serious pressure on the rear of the vehicle couplers.
出处
《大连交通大学学报》
CAS
2017年第2期11-14,共4页
Journal of Dalian Jiaotong University
关键词
重载列车
制动特性
缓解特性
纵向冲动
试验分析
heavy haul train
braking performance
releasing performance
longitudinal dynamics
experimental analysis
