규칙파 중 사각형 부유식 구조물의 횡동요 운동특성에 대한 연구

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 33; no. 2; pp. 131 - 138
• Main Authors: 김민규(Min-Gyu Kim), 정광효(Kwang-Hyo Jung), 박성부(Sung-Boo Park), 이강남(Gang-Nam Lee), 박일룡(Il-Ryong Park), 서성부(Sung-Bu Suh)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2019
• Subjects: 해양공학; Regular wave 규칙파; Roll-heave interaction 횡동요-상하운동 연성; Roll motion 횡동요 운동; Viscous damping 점성 감쇄; CFD 전산유체역학; -
• ISSN: 1225-0767; 2287-6715
• DOI: 10.26748/KSOE.2019.009

This study focused on the roll motion characteristics of a two-dimensional (2D) rectangular floating structure under regular beam sea conditions. An experiment was conducted in a 2D wave tank for a roll free decay test in calm water and the roll motion in a range of regular waves with and without heave motion to investigate the motion response and heave influence on the roll motion. A numerical study was carried out using Reynolds-averaged Navier Stokes (RANS)-based CFD simulations. A grid convergence test was conducted to accurately capture the wave condition on the free surface based on the overset mesh and wave forcing method. It was found in the roll free decay test that the numerical results agreed well with the experimental results for the natural roll period and roll damping coefficient. It was also observed that the heave motion had an impact on the roll motion, and the responses of the heave and roll motion from the CFD simulations were in reasonable agreement with those from the experiment.