Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Damage Detection of Beam Member Based on POM Curvature Extracted from Measured FRF Data

계측된 FRF 데이터로부터 추출된 POM 곡률의 평균값에 근거한 보 구조물의 손상탐지

  • Received : 2014.12.22
  • Accepted : 2015.03.16
  • Published : 2015.04.30
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Abstract

This work presents an analytical method for detecting damage of flexural beam member without the baseline data at intact state. Utilizing FRF (frequency response function) data collected in the neighborhood of the resonance frequency, the POV (proper orthogonal value) and the corresponding POM (proper orthogonal mode) are extracted to use as a damage detection index. It is observed from the POM curvature curve that the damage coincides with the location to represent the abrupt change of the curve. The validity of the proposed method is illustrated in a numerical experiment. The sensitivity of the proposed method depending on the measurement data contaminated by the external noise, the resonance frequency region to collect the FRF data and the selected POV is investigated in a numerical experiment.

Keywords

Acknowledgement

Supported by : 한국연구재단, 강원대학교

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