Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Fragility Assessment of Offshore Wind Turbine by Ship Collision

선박충돌에 의한 해상풍력발전기의 취약도 평가

  • Cho, Byung Il (Dep. of Ocean Science and Engineering, Kunsan National University) ;
  • Kim, Dong Hyawn (Dep. of Ocean Science and Engineering, Kunsan National University)
  • 조병일 (군산대학교 해양산업공학과) ;
  • 김동현 (군산대학교 해양공학과)
  • Received : 2013.07.04
  • Accepted : 2013.08.30
  • Published : 2013.08.31
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Abstract

Offshore wind turbines has to be proved against accidental events such as ship collision. In this study, ship collision fragility analysis of offshore wind turbine is done. Dynamic collision analysis is accomplished by considering soil foundation interaction and fluid structure interaction. Uncertainties due to ship weight and speed, angle are also considered. By analyzing dynamic response of offshore wind turbine, fragility curves are obtained for different damage levels. They can be used for restricting boat speed around the wind turbine and allowable size of the boat for inspection and for other purposes. Results of the fragility, it was confirmed fragility of collision speed of bulk ship of 30,000DWT and 850ton barge ship.

해상풍력발전기는 주위를 항행하는 선박 및 바지선등과 같은 선박에 의한 충돌피해가 발생할 수 있기 때문에 이에 대한 안정성을 고려해야 한다. 본 연구에서는 선박충돌에 대해 안정성을 고려하기 위해 해상풍력발전기의 선박충돌해석을 수행하고 충돌하중의 불확실성을 고려하기 위해 충돌취약도를 분석하였다. 충돌해석은 해저지반-기초구조물의 상호작용 및 유체를 p-y곡선과 부가질량법으로 고려하였다. 충돌취약도는 선박의 중량과 충돌각, 선박흘수를 변동성으로 고려하여 항복응력에 대한 손상수준을 추정하였으며 취약도를 분석한 결과, 850ton 바지선과 30,000DWT 화물선의 충돌속도에 취약함을 확인하였다.

Keywords

References

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Cited by

  1. Ship collision analysis on offshore wind turbine monopile foundations vol.51, 2017, https://doi.org/10.1016/j.marstruc.2016.10.009