Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Change of Ice Resistance of Ice-Breaking Tanker According to Frictional Coefficient

빙마찰계수에 따른 쇄빙탱커의 빙저항 변화

  • Cho, Seong-Rak (Korea Research Institute of Ships & Ocean Engineering, KIOST) ;
  • Lee, Sungsu (School of Civil Engineering, Chungbuk National University) ;
  • Lee, Yong-Chul (Ship and Offshore Research Institute, Samsung Heavy Industries Co., Ltd.) ;
  • Yum, Jong-Gil (Korea Research Institute of Ships & Ocean Engineering, KIOST) ;
  • Jang, Jinho (Korea Research Institute of Ships & Ocean Engineering, KIOST)
  • 조성락 (한국해양과학기술원 선박해양플랜트연구소) ;
  • 이승수 (충북대학교 토목공학부) ;
  • 이용철 (삼성중공업 조선해양연구소) ;
  • 염종길 (한국해양과학기술원 선박해양플랜트연구소) ;
  • 장진호 (한국해양과학기술원 선박해양플랜트연구소)
  • Received : 2020.12.02
  • Accepted : 2021.04.16
  • Published : 2021.06.20
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Abstract

This study describes the model tests in ice according to the frictional coefficient of an ice-breaking ship and the change in ice resistance by the analysis method for each component of ice resistances. The target vessel is a 90K DWT ice-breaking tanker capable of operating in ARC7 ice conditions in the Arctic Ocean, and twin POD propellers are fitted. The hull was specially painted with four different frictional coefficients on the same ship model. The total ice resistance can be separated by ice breaking, ice buoyancy, ice clearing resistances through the tests in level ice, pre-sawn ice and creep test in pre-sawn ice under sea ice thickness of 1.2 m and 1.7 m. Ice resistance was analyzed by correcting the thickness and bending strength of model ice by the ITTC correction method. As the frictional coefficient between the hull and ice increases, ice buoyancy and clearing resistances increase significantly. When the surface of the hull is rough, it is considered that the broken ice pieces do not slip easily to the side, resulting in an increase in ice buoyancy resistance. Also, the frictional coefficient was found to have a great influence on the ice clearing resistance as the ice thickness became thicker.

Keywords

Acknowledgement

본 연구는 한국해양과학기술원 선박해양플랜트연구소 주요과제인 "쇄빙선박 빙성능 시험평가 기술 개발(PES3420)"과 "선박의 빙해역 저항성능 고도화 및 위치유지성능 시험평가 기반구축(PES9451)"의 지원으로 수행되었으며, 연구비 지원에 감사드립니다.

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