上海交通大学学报

上海交通大学学报（自然版） ›› 2015, Vol. 49 ›› Issue (07): 1010-1016.

• 交通运输 • 上一篇    下一篇

基于弹性波理论的高铁线下结构病害快速检测方法

杨鸿凯，车爱兰，汤政，冯少孔   

  1. (上海交通大学 土木工程系， 上海 200240)
  • 收稿日期:2014-10-30 出版日期:2015-07-30 发布日期:2015-07-30
  • 基金资助:

    国家自然科学基金（11372180），上海市自然科学基金（13ZR1419900）资助项目

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

YANG Hongkai,CHE Ailan,TANG Zheng,FENG Shaokong   

  1. (Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2014-10-30 Online:2015-07-30 Published:2015-07-30

摘要：

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.

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

Abstract:

Abstract： 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 qualitative 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 method were proposed to evaluate the space distribution of preinstall defect.
Key words：

Key words:  high-speed railway underline structure, type of defects, elastic wave field, two-dimensional model with defects, model test

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