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

The Society of Naval Architects of Korea (대한조선학회)
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An Analysis on Ice Load Signals Measured from Repetitive Ramming in Heavy Ice Condition

두꺼운 해빙에 대한 충격쇄빙 시 빙하중 신호 분석

  • Ahn, Se-Jin (Department of Ocean System Eng., Graduate School, Gyeongsang National University) ;
  • Lee, Tak-Kee (Department of Naval Archi. & Ocean Eng., Gyeongsang National University, Institute of Marine Industry) ;
  • Choi, Kyungsik (Department of Ocean Engineering, Korea Maritime and Ocean University)
  • 안세진 (국립 경상대학교 대학원, 해양시스템공학과) ;
  • 이탁기 (국립 경상대학교 조선해양공학과, 해양산업연구소) ;
  • 최경식 (국립 한국해양대학교 해양공학과)
  • Received : 2018.02.20
  • Accepted : 2018.05.08
  • Published : 2018.08.20
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Abstract

To navigate in ice-covered waters, the ice-breaking process is required. The ice-breaking mode depends on material properties of sea ice and ice conditions. The ice-breaking mode is classified into ramming and continuous ice-breaking. The ramming is effective on large ice features, such as thick ice ridge and icebergs, and the continuous ice-breaking is on level ice. In general, the impact time duration of crushing or bending on ice sheets is from 0.2 to 1.0 second. However, impact duration in ramming will be increased. The Korean ice-breaking research vessel ARAON conducted her research voyage in the Antarctic sea during the winter of 2012. The IBRV ARAON measured strain in ramming and continuous ice-breaking. Strain gauge signals were recorded during the planned ice-breaking performance and the unplanned ice transits in heavy ice conditions. The aim of this study is to investigate the ice load signals measured in ramming processes under the heavy ice condition. Based on the time history of the signals, a raising time, a half-decaying time and time duration were investigated and compared with the previous study which was suggested the five profiles of the ice load signals.

Keywords

References

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