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Parametric Study on Scouring around Suction Bucket Foundation

파라미터 변화에 따른 석션버켓기초에 발생하는 세굴현상에 대한 수치해석 연구

  • 박선호 (한국해양대학교 해양공학과) ;
  • 송성진 (한국해양대학교 해양공학과) ;
  • 왕해청 (한국해양대학교 해양공학과) ;
  • 정태환 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 신윤섭 (노르웨이 지반연구소)
  • Received : 2017.07.04
  • Accepted : 2017.08.25
  • Published : 2017.08.31

Abstract

In the case of fixed offshore wind turbines, scouring phenomena have been reported around sub-structures as a result of currents, which seriously damage the structural stability. A parametric study of the various sub-structures of a fixed offshore wind turbine was performed to investigate their effects on the scouring phenomena. For a suction bucket foundation and monopile, the effects of the stick-up heights and water depth were studied, respectively. The open source libraries, called OpenFOAM, were used to simulate a violent flow around a foundation. The numerical methods were selected based on a two-dimensional analysis of a suction bucket. Based on the results for various stick-up heights, a larger scouring region was observed with an increase in the stick-up height because of the down-wash flow around a foundation. Based on the results for various monopile water depths, the water depth had an insignificant effect on the scouring.

Keywords

Computational fluid dynamics(CFD);Scour;OpenFOAM;Stick-up;Suction bucket;Monopile

Acknowledgement

Grant : 해양플랜트 구조안전성평가 체계구축을 위한 구조설계엔지니어링 기반기술 연구

Supported by : 미래창조과학부, 선박해양플랜트연구소

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