摘要
高速铁路钢轨波磨、焊接接头凸凹、翼轨堆高等短波病害虽然幅值较小,但会产生较大的振动冲击响应,增加轮轨系统部件的损伤。结合轴箱加速度和轮轨力高频车辆动态响应,提出集成轨道冲击指数(TII)和波磨指数(RCI)的高速铁路轨道短波健康状态动态诊断方法,以及基于改进同步压缩短时傅里叶变换(SSTFT)的时频特征挖掘算法和轨道-轮对系统高频仿真模型。新的动态诊断方法利用安装在高速综合检测列车上的传感器采集的车辆动态响应数据,计算带通滤波后数据的加窗能量信号用以代替原始振动信号,在保留轨道短波病害引起的高频振动特性的前提下,将轨道短波冲击引起的振动特性从高频解调到低频,保证了结果的高稳定性,解决了利用幅值进行评判时诊断结果随机性较强的难题。分析结果和现场复核结果表明,新的评判方法能有效诊断钢轨波磨、焊接接头凸凹等短波病害。
Despite small amplitudes of track shortwave irregularities of high-speed railways, such as steel corrugations, concave and convex welded joints and lifted wing rails, they can produce great impulse response and increase the damage of the wheel-rail system components. Two new criteria named Track Impact Index(TII) and Rail Corrugation Index(RCI) were proposed to diagnose track shortwave irregularities by use of axle-box acceleration and wheel-rail contact force. A time-frequency algorithm based on the Synchro-squeezed Short-time Fourier Transform(SSTFT) method for vehicle dynamic response and a high frequency finite element simulation model of track-vehicle system were proposed. Different from the traditional amplitude method, this new method uses the vehicle dynamic response data collected by the sensors installed on the high-speed comprehensive detection train to calculate the windowed energy signal to replace the original vibration signal to replace the original vibration signal to demodulate the high frequency components into the low frequency components without losing the vibration characteristics, which could reduce the randomness of the inspection data. The analysis results and field review results show that this new method can effectively detect the track shortwave deviations.
作者
刘金朝
徐晓迪
牛留斌
孙善超
张二永
赵钢
LIU Jinzhao;XU Xiaodi;NIU Liubin;SUN Shanchao;ZHANG Eryong;ZHAO Gang(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Railway Infrastructure Inspection Center,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2021年第10期69-74,共6页
Journal of the China Railway Society
基金
中国铁路总公司科技研究开发计划(2017G011-E,P2018G051,J2018G007)。
关键词
轨道冲击指数
波磨指数
轨道短波不平顺
轴箱振动加速度
高速铁路
track impact index
rail corrugation index
track shortwave irregularity
axle-box acceleration
high-speed railway
