中文摘要：

高速铁路受电弓和接触网之间的接触力是间接反映接触线不平顺状态的重要参数,目前对接触线不平顺波长分析的研究还处于起步阶段。本文针对接触压力及其中存在的接触线不平顺波长成分,根据短里程接触压力数据的非平稳特性,通过试验确定了适用于接触压力时频分析的Zhao-Atlas-Mark Distribution（ZAMD）时频分布。在弓网有限元模型中使用余弦波形模拟了接触线的全局、局部和复合不平顺,使用ZAMD分析正常状态下和接触线不平顺状态下的接触压力,通过接触压力时频分析结果诊断和定位接触线不平顺。仿真和分析结果表明,ZAMD能有效分析正常和接触线复杂不平顺状态下的接触压力时频特性,并且定位持续里程大于10 m的接触线局部不平顺空间位置,为接触线不平顺状态评估和接触网养护工作提供一定参考。

英文摘要：

The contact force between pantograph and catenary in high-speed railwayis an important parameter that reflects the irregularity state of contact wire indirectly.The current study of contact wire irregularity wavelengths is still in a preliminary stage.Aiming at the pantograph-catenary contact force and the contact wire irregularity wavelengths contained in the contact force,this paper determined Zhao-Atlas-Mark Distribution（ZAMD）time frequency distribution that fits the contact force time-frequency analysisbased on the nonstationarity of short-distance data by testing.The global,local and complex irregularities in contact wire were simulated under pantograph-catenary finite element model by using cosine wave.The ZAMD was used to analyze contact force under normal state and under irregularity state of contact wire,to diagnose and locate contact wire irregularity through the results of time-frequency analysis of contact force.Simulation and analysis results showed that ZAMD can effectively analyzethe time-frequency characteristics of contact force under normal state and under irregularity state of contact wire and can locate the local irregularity of contact wire with distance duration larger than 10 m.ZAMD provided a certain reference for the irregularity state evaluation of contact wire and maintenance of catenary system.