Vibration-Based Damage Detection With Structural Modal Characteristics

In structural health monitoring systems, the requirement of a systematic, effective structural damage localization and severity assessment method based on a sensor measured vibration data is a challenging problem. Damage estimator with before and after damage structural modal parameters is the name given to a novel technique used to address this issue. An experimental test series, specifically, using a four-story jacket type scaled offshore platform model has been conducted for proposed approach efficiency verification, with white noise excitations applied to the test model top plate. For six damage condition scenarios simulated by third layer bolt adjustment, impact hammer induced vibration-based impulse data and recorded for modal parameter variation analysis. The investigation reveals that, using only fundamental before and after damage mode shape data, the damage estimator is capable of longitudinal severity and damage orientation tracking. For small-scale damages, however, there is a considerable decline in detection accuracy.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1822427X
• Authors:
  • Yonggang, Wang
  • Yulong, Pei
  • Yangdong, Zhao
• Publication Date: 2008

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 21-28
• Serial:
  • Baltic Journal of Road and Bridge Engineering
  • Volume: 3
  • Issue Number: 1
  • Publisher: Vilnius Gediminas Technical University
  • ISSN: 1822-427X
  • EISSN: 1822-4288
  • Serial URL: https://bjrbe-journals.rtu.lv/index
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Accuracy; Sensors; Simulation; Structural health monitoring; Vibration
• Uncontrolled Terms: Damage assessment; Damage localization; Damage severity; Efficiency; Estimators; Modal parameters; Verification
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01103081
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 24 2008 7:44AM