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풍하중에 의한 바지선의 예인 시 거동특성 변화에 관한 연구
남보우(Bo Woo Nam),최영명(Young-Myoung Choi),홍사영(Sa Young Hong) 한국해양공학회 2015 韓國海洋工學會誌 Vol.29 No.4
This paper presents the results of a numerical study on the towing characteristics of a barge under various wind conditions. First, stability criteria, including the wind force, were derived based on the linear motion equations of a towed vessel. The effect of the wind force on the towing stability was investigated using stability criteria. Next, towing simulations were carried out using a nonlinear time-domain simulation method. In this case, the towline was modeled as a simple spring-damper, and the wind force was computed using the wind coefficient from CFD calculations. Simulations were conducted for a barge under a constant towing speed and constant wind speed conditions. The effect of the wind direction on the slewing motion was also observed. In addition, a series of numerical simulations using variable wind speeds were performed for the present barge with and without a skeg.
실린더 형상에 따른 Wave Run-up 현상에 대한 연구
이상범(Sang Beom Lee),한승윤(Seung Yoon Han),최영명(Young Myoung Choi),권순홍(Sun Hong Kwon),정동우(Dong Woo Jung),박준수(Jun Soo Park) 한국해양공학회 2013 韓國海洋工學會誌 Vol.27 No.4
In this paper, the wave run?up on a vertical cylinder is presented. Various cross sections of a cylinder were simulated using the panel method for various wave periods. Two?dimensional model tests were performed in a wave flume. The simulation results are compared with the test results. The simulation is based on the linear diffraction theory.