재료물성치의 불확실성을 고려한 고정식 해상풍력터빈의 고유진동수에 대한 지반-말뚝 상호작용의 영향

Title
재료물성치의 불확실성을 고려한 고정식 해상풍력터빈의 고유진동수에 대한 지반-말뚝 상호작용의 영향
Alternative Title
Influence of pile-soil-interaction on natural frequency of bottom-fixed offshore wind turbines considering material uncertainties
Author(s)
이진학; 김선빈; 한택희; 윤길림; Lars V Andersen
KIOST Author(s)
Yi, Jin Hak(이진학)Han, Taek Hee(한택희)Yoon, Gil Lim(윤길림)
Publication Year
2015-08-27
Abstract
Monopiles have been most widely utilized for supporting offshore wind turbines (OWTs) in shallow waters. However, multi-member lattice-type structures including jackets and tripods are being also considered as one of the good alternatives to monopile foundations for relatively deep water in the range of 25-50 m of water depth owing to their technical and economic feasibility. Moreover, jacket structures are conventionally used in the oil and gas industry very popularly. However, there are still several issues need to be solved for utilization of multi-member lattice-type supporting structures for OWTs including pile-soil-interaction (PSI) effects, dynamically stable design, installation, and so on. In this study, the PSI effects on the dynamic properties of bottom-fixed OWTs are intensively investigated including monopile-, tripod- and jacket-supported OWTs. The tower and substructure are modeled using conventional beam elements with added mass and the pile foundations are modeled with beam and nonlinear spring elements, and the PSI effects on dynamic properties of the structure are evaluated using Monte Carlo simulation considering uncertainties in soil properties.o monopile foundations for relatively deep water in the range of 25-50 m of water depth owing to their technical and economic feasibility. Moreover, jacket structures are conventionally used in the oil and gas industry very popularly. However, there are still several issues need to be solved for utilization of multi-member lattice-type supporting structures for OWTs including pile-soil-interaction (PSI) effects, dynamically stable design, installation, and so on. In this study, the PSI effects on the dynamic properties of bottom-fixed OWTs are intensively investigated including monopile-, tripod- and jacket-supported OWTs. The tower and substructure are modeled using conventional beam elements with added mass and the pile foundations are modeled with beam and nonlinear spring elements, and the PSI effects on dynamic properties of the structure are evaluated using Monte Carlo simulation considering uncertainties in soil properties.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25325
Bibliographic Citation
2015 World Congress on Advances in Structural Engineering and Mechanics (ASEM15), pp.1 - 11, 2015
Publisher
IASEM
Type
Conference
Language
English
Publisher
IASEM
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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