광섬유 FBG 센서를 이용한 재킷식 해양구조물의 국부손상 탐색 실내실험

Abstract

The development of smart sensors for structural health monitoring and damage detection has been advanced remarkably in recent years. Nowadays fiber optic sensors, especially fiber Bragg grating (FBG) sensors, have attracted many researchers interest for their attractive features, such as multiplexing capability, durability, lightweight, and electromagnetic interference immunity. In this paper, a local damage detection approach of jacket-type offshore structures by principal component analysis (PCA) technique using FBG sensors are presented. An experimental study for a tidal current power plant structure as one of jacket-type offshore structures was conducted to investigate the feasibility of the proposed method for damage detection and localization. It has been found that the PCA technique can more efficiently eliminate environmental effects from raw data measured by FBG sensors, resulting more damage-sensitive features under various environmental changes interest for their attractive features, such as multiplexing capability, durability, lightweight, and electromagnetic interference immunity. In this paper, a local damage detection approach of jacket-type offshore structures by principal component analysis (PCA) technique using FBG sensors are presented. An experimental study for a tidal current power plant structure as one of jacket-type offshore structures was conducted to investigate the feasibility of the proposed method for damage detection and localization. It has been found that the PCA technique can more efficiently eliminate environmental effects from raw data measured by FBG sensors, resulting more damage-sensitive features under various environmental changes