基于弹性波理论的高铁线下结构病害快速检测方法  

Elastic-Wave-Based Detection Method for Under Line Structure of High-Speed Railway

作　　者：杨鸿凯 车爱兰[1] 汤政[1] 冯少孔[1] 

机构地区：[1]上海交通大学土木工程系,上海200240

出　　处：《上海交通大学学报》2015年第7期1010-1016,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(11372180);上海市自然科学基金(13ZR1419900)资助项目

摘　　要：基于对高铁线下结构及其病害的调查与分析,将高铁线下结构简化为二维的多层层状结构,以此为基础建立高铁线下结构二维缺陷模型,采用有限元动力法分析弹性波的传播特性,特别是其波形能量、卓越频谱特性.研究不同缺陷类型时弹性波的传播特性的变化规律,建立两者间的定性关系.在此基础上,针对高铁线下结构常见的两种病害类型开展1∶1比例尺模型试验研究,探讨了数据采集、分析及成果可视化等研究方法,评价了预设缺陷的空间分布.Based on the analysis and research of the structure and defects, the high-speed railway underline structure was simplified into a two-dimensional multi-medium structure, and a two-dimensional defect model of the underline structure was established. By using the dynamic finite element method, the elastic wave propagation characteristics, especially waveform and predominant spectrum were deduced. The quali- tative relationship between the variation of elastic wave propagation characteristics and different defects was established. Aimed at the two common types of defects, a 1＂ 1 full scale model of high-speed railway with defects was established. The data collection method, analysis method, and result visualization meth- od were proposed to evaluate the space distribution of preinstall defect.

关 键 词：高铁线下结构 病害类型 弹性波场 二维缺陷模型 模型试验 

分 类 号：U216.3[交通运输工程—道路与铁道工程]