时速350km沪宁客运专线轨道不平顺功率谱分析  

Analysis of the Power Spectral Density of the 350 km/h Shanghai-Nanjing Dedicated Passenger Railway

作　　者：徐磊[1,2] 陈宪麦[1,2] 贾浩波[1,2] 徐伟昌[3] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]高速铁路建造技术国家工程实验室,湖南长沙410075 [3]上海铁路局工务处,上海200070

出　　处：《土木工程与管理学报》2013年第2期22-26,共5页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51008315);中南大学研究生自主探索创新项目(201322ts233);上海铁路局科研项目(2013072)

摘　　要：基于国内尚缺乏对时速350 km高铁线不平顺的研究,在对比分析国内外常用不平顺谱的基础上,以沪宁线2010年7月轨检车实测轨道不平顺数据为统计样本,利用Welch改进周期图法对预处理后的沪宁线轨道不平顺数据进行功率谱计算,并将其不平顺功率谱与美国六级谱、德国低干扰谱及国内时速200 km提速线路统计谱进行比较,分析了沪宁线的基本不平顺特征。结果表明:除部分波段外,沪宁客运专线轨道不平顺谱优于其他谱,状态较好。最后,通过统计分析沪宁客运专线不平顺数据,提出了沪宁客运专线的轨道谱线表达式结构,经试算和非线性最小二乘拟合优化算法,获得了时速350 km沪宁线拟合轨道谱特征参数,为沪宁线平顺性评估提供了重要的技术参数。Based on the lack of sufficient research on the track irregularity of high speed railway, and contrasting the domestic statistical spectrum to the foreign commonly used spectrum, as well as the rail irregularity test data of Shanghai-Nanjing Passenger Railway in July 2010, using the improved Welch periodogram method, compared the Shanghai-Nanjing Railway＇ s irregularity spectrum with the United States sixth level spectrum, Germany low-disturbing spectrum, China seven parameters spectrum and 200km/h speed improvement statistic spectrum, and analyzed the basic characteristics of the Shanghai-Nanjing Railway＇ s irregularity, the results show that the Shanghai-Nanjing Passenger Railway spectrum is better than the spectrums getting involved in the process of analysis expect some wave-band; at last, by statistics analysis the test data of Shanghai-Nanjing Railway, this text put forward the expression structure of the track irregularity spectrum, through the nonlinear least squares estimate optimization algorithm, the parameters of the fitting spectrum are got.

关 键 词：沪宁客运专线 轨道不平顺 功率谱密度函数 非线性最小二乘拟合 

分 类 号：U211[交通运输工程—道路与铁道工程]