上海交通大学学报

上海交通大学学报（自然版） ›› 2015, Vol. 49 ›› Issue (07): 1017-1022.

• 交通运输 • 上一篇    下一篇

高铁多层线下结构病害全波场无损检测方法与技术

汤政1,车爱兰1,冯少孔1，施有志2，范岩旻1   

  1. (1.上海交通大学 船舶海洋与建筑工程学院， 上海 200240；2.厦门理工学院 土木工程与建筑学院， 福建 厦门 361021)
  • 收稿日期:2014-10-30
  • 基金资助:

    中国铁路总公司科技研究开发计划重大课题（2013G004A1）

Detection Methods and Research About Full-wavefield Imaging Detection Method on High-Speed Railway Under-Track Structure

TANG Zheng1,CHE Ailan1,FENG Shaokong1,SHI Youzhi2,FAN Yanmin1   

  1. (1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. School Civil Engineering and Architecture,
    Xiaman Unviersity of Technology, Xiamen 361021, Fujian, China)
  • Received:2014-10-30

摘要：

摘要：  为了评估全波场无损检测方法在高铁线下结构病害检测中的效果，进行了砂浆层缺陷与路基顶部缺陷2种情况下的三维有限元数值模拟分析，明确弹性波在多层线下结构中的传播特性.开展了预埋缺陷的1∶1的高铁模型试验，通过对采集数据进行分析与处理，评价缺陷的位置及空间分布.结果表明，弹性波在多层结构中传播，遇缺陷时其传播能量增大，卓越特征亦放大.现场检测结果与预埋缺陷位置及空间分布相吻合.这表明在高速铁路多层线下结构病害检测中全波场无损检测方法效果较好，并有巨大的发展空间.

关键词: 高速铁路, 全波场, 无损检测, 线下结构

Abstract:

Abstract： A full-wavefield imaging detection system integrates the point-source/point-receiver scheme with the multi-directional imaging technique. It is equipped with an impacting hammer, a series of three-component velocity transducers and a signal capturing unit. To evaluate the feasibility of this system for detecting defect of high speed railway under-track structure, a full-scaled highway embankment model test with pre-setting defection was conducted and a 3-D numerical simulation using FEM was performed for comparison and mechanism study. The results are in agreement with the numerical ones on the processed scanning images. It is concluded that the full-wavefield imaging detection method exhibits high potential in inspecting the defects of high speed railway under-track structure by imaging.

Key words: high speed railway, full-wavefield, nondestructive testing； under-track structure

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