Identification of Mortar Void Using the Wheelset Acceleration Based on the Local Mean Decomposition

The cement asphalt (CA) mortar is an important part of the ballastless slab track system. The void between the slab and the mortar layer is prone to occur due to the particularity of CA mortar material and the complexity of external loads. To efficiently identify the mortar void, the local mean decomposition (LMD) is introduced to separate the wheelset acceleration into a set of production functions (PFs). The kurtosis of PF is calculated and PF1 containing the most damage information is selected for further processing. The instantaneous energy and the standardized instantaneous energy of PF1 are calculated. The result shows that when the length of the mortar void does not exceed 0.3 m, the method proposed in this paper cannot accurately locate the mortar damage. And when the mortar void length reaches 0.65 m, the standardized instantaneous energy has the best performance in the damage detection.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 16 - 23
  • Monograph Title: ICRT 2021: Second International Conference on Rail Transportation

Subject/Index Terms

Filing Info

  • Accession Number: 01840790
  • Record Type: Publication
  • ISBN: 9780784483886
  • Files: TRIS, ASCE
  • Created Date: Mar 29 2022 9:32AM