铁道科学与工程学报2024，Vol.21Issue(4)：1275-1285,11.DOI:10.19713/j.cnki.43-1423/u.T20231039
高速铁路钢轨波磨地段轴箱振动加速度时频特征分析
Time-frequency characteristics analysis of axle box acceleration in high-speed railway rail corrugation section
摘要
Abstract
Rail corrugation is a common rail disease in high-speed railway.To study the relationship between rail corrugation and the time-frequency characteristics of axle box acceleration,and to explore the feasibility of identifying rail corrugation using axle box acceleration,a rigid-flexible coupled dynamics model was established with the flexible wheelset and axle box.The accuracy of the model was verified by the comparison with the measurements.The VMD-SPWVD method was proposed based on the relationship between rail corrugation and axle box acceleration in time domain.The results show that rail corrugation has a great influence on the axle box acceleration.The maximum positions of axle box acceleration under different wave depths and lengths are random in time domain.There is a certain relationship between rail corrugation and the root mean square.However,as a time domain index,it cannot accurately locate the region of rail corrugation and evaluate its severity.Compared with the time domain method,the VMD-SPWVD can effectively reflect the relationship between rail corrugation and axle box acceleration,and identify the characteristic frequency of rail corrugation without any interference.The energy amplitude increases monotonically with the wave depth.This method can locate the region where rail corrugation exists and reflect its severity at different positions.The effectiveness of this method was further validated by the field test.关键词
高速铁路/钢轨波磨/轴箱加速度/动力学响应/时频特征Key words
high-speed railway/rail corrugation/axle box acceleration/dynamic response/time-frequency characteristics分类
交通工程引用本文复制引用
和振兴,刘旭麒,王玉魁,封全保,王淑珍..高速铁路钢轨波磨地段轴箱振动加速度时频特征分析[J].铁道科学与工程学报,2024,21(4):1275-1285,11.基金项目
国家自然科学基金资助项目(52162047) （52162047）
兰州市科技计划项目(2022-2-26) （2022-2-26）
