Damage identification of supporting structures with a moving sensory system

X. Q. Zhu, S. S. Law, L. Huang, Songye Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)


An innovative approach to identify local anomalies in a structural beam bridge with an instrumented vehicle moving as a sensory system across the bridge. Accelerations at both the axle and vehicle body are measured from which vehicle-bridge interaction force on the structure is determined. Local anomalies of the structure are estimated from this interaction force with the Newton's iterative method basing on the homotopy continuation method. Numerical results with the vehicle moving over simply supported or continuous beams show that the acceleration responses from the vehicle or the bridge structure are less sensitive to the local damages than the interaction force between the wheel and the structure. Effects of different movement patterns and moving speed of the vehicle are investigated, and the effect of measurement noise on the identified results is discussed. A heavier or slower vehicle has been shown to be less sensitive to measurement noise giving more accurate results.

Original languageEnglish
Pages (from-to)111-127
Number of pages17
JournalJournal of Sound and Vibration
Publication statusPublished - 17 Feb 2018


  • Damage identification
  • Homotopy iteration algorithm
  • Interaction force
  • Moving sensor

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering


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