질량재배치방법을 이용한 가거초 해양과학기지의 구조물 모델 개선

Title
질량재배치방법을 이용한 가거초 해양과학기지의 구조물 모델 개선
Alternative Title
Structural model updating of the Gageocho Ocean Research Station using mass reallocation method
Author(s)
김병모; 이진학
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2019-09-17
Abstract
To study oceanic and meteorological problems related to climate change, Korea has been operating several ocean research stations (ORSs). In 2011, the Gageocho ORS was attacked by Typhoon Muifa, and its structural members and several observation devices were severely damaged. After this event, the Gageocho ORS was rehabilitated with 5 m height to account for 100-yr extreme wave height, and the vibration measurement system was equipped to monitor the structural vibrational characteristics including natural frequencies and modal damping ratios. In this study, a mass reallocation method is presented for structural model updating of the Gageocho ORS based on the experimentally identified natural frequencies. Apreliminary finite element (FE) model was constructed based on design drawings, and several of the candidate baseline FE models were manually built, taking into account the different structural conditions such as corroded thickness. Among these candidate baseline FE models, the most reasonable baseline FE model was selected by comparing the differences between the identified and calculated natural frequencies the most suitable baseline FE model was updated based on the identified modal properties, and by using the pattern search method, which is one of direct search optimization methods. The mass reallocation method is newly proposed as a means to determine the equivalent mass quantities along the height and i
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22405
Bibliographic Citation
ASEM 2019-The 2019 World Congress on Advances in Structural Engineering and Mechanics, pp.1 - 24, 2019
Publisher
TechnoPress
Type
Conference
Language
English
Publisher
TechnoPress
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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