铁路货车纵向载荷的试验测量和统计推断研究

通过线路测试得到我国通用线路C70货车车钩纵向载荷时间历程,利用雨流计数法得到车钩纵向载荷均值-频次谱。分别对我国通用线路C70货车车钩纵向载荷谱、大秦线C80B货车车钩纵向载荷谱、AAR90.7t漏斗车车钩纵向载荷谱及FMG矿石车车钩纵向载荷谱的分布特征进行分析,并对最大纵向载荷进行统计推断研究。研究结果表明:铁路货车最大纵向载荷随着轴重、牵引吨位的增大而增大。经纵向动力学仿真分析发现,单车轴重、牵引吨位、编组方式的不同是导致上述变化的原因。

On the Experimental Measurement and Statistical Inference of Railway Freight Train Longitudinal Load

Through on-line testing, the coupling gear longitudinal load time history of universal line C70 freight train was obtained. By using rain-flow counting method, the longitudinal load mean value of coupling gear and frequency spectrum were obtained,respectively. The distribution characteristics of coupling gear longitudinal load spectrum taken from universal line C70 freight train, Da-Qin line C80B freight train, AAR 90.7t hopper wagon and FMG ore car respectively, were analyzed, the statistical inference of the maximum longitudinal load was conducted. Results show that the maximum longitudinal load of railway freight train increases with the increase of axile load and traction tonnage. Longitudinal dynamics simulation reveals that the single freight train axile load, the traction tonnage and different train grouping types are the main causes of above results.