【摘要】 城市轨道交通车辆轮轨间的振动是列车车轮现状的表现,对轮轨振动信号的分析会对今后的研究应用发挥重大作用。本文以城轨列车车轮扁疤故障为研究对象,旨在得到有效分析车轮扁疤故障的有效分析方法。首先,以经典时频方法为理论基础,提出基于改进的WVD城轨列车车轮扁疤故障检测方法;其次,通过Simpack软件构建轮轨动力学仿真模型并得到相关数据。最后,根据仿真数据验证改进的WVD理论,得到故障车轮和正常车轮在幅值和频率分布上的差异。更多还原

【Abstract】 The vibration of wheel-rail will play a major role on analysing vibration signal,which reflects the wheel state. Based on urban railway wheel tread, the paper aims to find an analysis method to analyze railway wheel tread. First of all, based on classical time-frequency method, this paper proposes Improved Wigner-Ville theory. Then, modeling process of SIMPACK was mentioned and the simulation data was obtained. Based on Improved Wigner-Ville theory, differences between normal wheel and treaded wheel on amplitude and frequency were obtained by analyzing simulation data.更多还原