압전소자를 이용한 손상계측기술에 관한 기초연구

Basic research for Health Monitoring Technique with PZT Patches

  • 하남 (전북대학교 정밀기계공학과) ;
  • 채관석 (전북대학교 기계설계공학과) ;
  • 홍동표 (전북대학교 정밀기계공학과) ;
  • 채희창 (전북대학교 기계설계공학과)
  • 발행 : 2004.11.01

초록

This work presents a study on development of a practical and quantitative technique for assessment of the structural health condition by Piezoelectric impedance-based technique associated with longitudinal wave propagation method. The bolt fastening condition is adjusted by torque wrench. In order to estimate the damage condition numerically, three damage indices, impedance peak frequency shift ${\Delta}F$, peak amplitude ratio $\delta$ and quality factor ratio $\gamma$, are proposed in this paper. Furthermore, an assessment method is described for estimation of the damage by using these three damage indices.

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