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김문찬,이승기,이원준,왕정용 대한조선학회 2013 International Journal of Naval Architecture and Oc Vol.5 No.1
The resistance performance of an icebreaking cargo vessel in pack ice conditions was investigated numerically and experimentally using a recently developed finite element (FE) model and model tests. A comparison between numerical analysis and experimental results with synthetic ice in a standard towing tank was carried out. The comparison extended to results with refrigerated ice to examine the feasibility of using synthetic ice. Two experiments using two different ice materials gave a reasonable agreement. Ship-ice interaction loads are numerically calculated based on the fluid structure interaction (FSI) method using the commercial FE package LS-DYNA. Test results from model testing with synthetic ice at the Pusan National University towing tank, and with refrigerated ice at the National Research Council’s (NRC) ice tank, are used to validate and benchmark the numerical simulations. The designed icegoing cargo vessel is used as a target ship for three concentrations (90%, 80%, and 60%) of pack ice conditions. Ice was modeled as a rigid body but the ice density was the same as that in the experiments. The numerical challenge is to evaluate hydrodynamic loads on the ship’s hull; this is difficult because LS-DYNA is an explicit FE solver and the FSI value is calculated using a penalty method. Comparisons between numerical and experimental results are shown, and our main conclusions are given.
합성얼음과 냉동얼음을 사용한 쇄빙선의 추진 성능 비교 연구
김문찬(Moon-Chan Kim),임태욱(Tae-Wook Lim),조준철(Jun-Cheol Jo),전호환(Ho-Hwan Chun),왕정용(Jungyong Wang) 한국해양공학회 2009 韓國海洋工學會誌 Vol.23 No.1
This paper reports on experimental investigations of self-propulsion performance with syntehtic (model) ice and refrigerated ice, which were conducted in a typical towing tank and ice tank, respectively. The main purpose of this research was to find the correlation between the self-propulsion performance with synthetic ice in a typical towing tank and that with refrigerated ice in an ice tank. The different stresses between the syntehtic ice and refrigerated ice influenced the self-propulsion performance due to different ice and propeller interactions. A further study on the ice property variation for a self-propulsion performance comparison is to be conducted in the near future.