高速无砟轨道扭曲不平顺谱统计分析  

Statistical analysis on torsion irregularity spectrum of ballastless track for high-speed railways

作　　者：余翠英[1,2] 向俊[1] 陈涛[3] 龚凯[1] 毛建红[4] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]南昌理工学院建筑工程学院,江西南昌330044 [3]铁道第三勘察设计院集团有限公司线站所,天津300140 [4]华东交通大学土木建筑学院,江西南昌330013

出　　处：《铁道科学与工程学报》2016年第12期2319-2326,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金委员会与神华集团有限公司联合资助项目(U1261113);高等学校博士学科点专项科研基金资助项目(20100162110022);牵引动力国家重点实验室开放课题资助项目(TPL0901;TPL1214);江西省青年科学基金资助项目(20142BAB216003);江西省教育厅科技资助项目(GJJ151173;GJJ151175)

摘　　要：基于京沪和哈大高速铁路轨道不平顺实测数据,从扭曲不平顺功率谱密度,拟合模型和拟合参数以及时域样本角度,对高速铁路扭曲不平顺谱进行统计分析。研究结果表明:高速铁路扭曲不平顺谱特征和轨道板类型有一定相关性;选取适当的拟合模型和参数可以使扭曲不平顺的时域仿真结果与实测结果和频域仿真结果较好相符,能够较好地反映我国高速铁路无砟轨道扭曲不平顺特征。从时域样本来看,随着扭曲不平顺谱的百分位数增加,其模拟的时域样本幅值也随之增加。由此可见,针对不同高铁线路轨道几何状态等级,应采用不同百分位数扭曲谱为高速列车-轨道(桥梁)时变系统振动的激振源,分析扭曲不平顺对高速列车车体动力响应及轨道结构的影响。According to track geometry data measured from Shanghai-Beijing and Harbin - Dalian high-speed railways, the torsion irregularity spectrums of high speed railways were statistically analyzed from the perspective of power spectrum density （PSD） , fitting model, simulation parameters and time domain samples. The results show that the characteristics of torsion irregularity of high-speed railway were related to the type of track slab. The simulation results in time domain of torsion irregularities agree well with the measured values as well as the simulation results infrequency domain by selecting the appropriate simulation parameters and fitting model, which can also embody the torsion irregularity character of high-speed railway ballastless track. The simulation ampli-tude of time domain samples will increase with the increasing of percentile spectrum of torsion irregularity. There-by ,it can be concluded that the influence of torsion irregularity researched on high-speed train as well as track structure should based on different percentile spectrum of torsion irregularity, which was provided as the exciting vibration source for vibration analysis of high- speed train and bridge （track） time-variant system on the basis of different geometrical states of high-speed railway.

关 键 词：高速铁路 无砟轨道 功率谱密度 扭曲不平顺 统计分析 

分 类 号：U213.2[交通运输工程—道路与铁道工程]