Structural Health Monitoring of Harbor Caisson-type Structures using Harmony Search Method

J. Ocean Eng. Technol. 2009;23(1):122-128.

Lee So-Young,Kim Jeong-Tae,Yi Jin-Hak,Kang Yoon-Koo

Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University,Coastal Engineering Research Dept. KORDI,Coastal Engineering Research Dept. KORDI

최적화 화음탐색법을 이용한 항만 케이슨 구조물의 구조건전성 평가

이소영,김정태,이진학,강윤구

부경대학교 해양공학과,부경대학교 해양공학과,한국해양연구원 연안개발연구본부,한국해양연구원 연안개발연구본부

Keywords: Harmony search, Micro genetic algorithm, Harbor caisson, Model update, Damage detection, Natural frequency, Modal-strain energy

핵심용어: 화음탐색, 마이크로 유전알고리즘, 항만 케이슨, 모델 개선, 손상 검색, 고유진동수, 모드변형에너지

Abstract

In this study, damage detection method using harmony search method and frequency response is proposed. In order to verify this method, the following approaches are implemented. Firstly, damage detection method using harmony search was developed. To detect damage, objective functions that minimize difference with natural frequency and modal strain energy from undamaged and damaged model are used. Secondly, efficiency of developed damage detection method was verified by damage detection of beam structure. And results of harmony search and micro genetic algorithm are compared and evaluated. Thirdly, numerical model was implemented for harbor caisson structure and damage scenario was determined. Lastly, damage detection was performed by proposed method and utility of proposed method is verified.