Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University ›› 2015, Vol. 49 ›› Issue (07): 1017-1022.

• Communication and Transportation • Previous Articles     Next Articles

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

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

CLC Number: