Theoretical and numerical estimation of ship-to-ship hydrodynamic interaction effects

OCEAN ENGINEERING

卷:121

Article

Yuan, Zhi-Ming¹  Ji, Chun-Yan²  Incecik, Atilla¹  Zhao, Wenhua³  Day, Alexander¹ 

[1] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow, Lanark, Scotland

[2] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang, Peoples R China

[3] Univ Western Australia, Ctr Offshore Fdn Syst M053, 35 Stirling Highway, Crawley, WA 6009, Australia

关键词: Hydrodynamic interaction;    Rankine source method;    Far-field wave pattern;    Boundary element method;    Ship-to-ship problem;    Forward speed effects;   

DOI  :  10.1016/j.oceaneng.2016.05.032

来源: Elsevier

【 摘 要 】

The main objective of this paper is to investigate theoretically and numerically how much interactions are expected between two ships travelling in waves. The theoretical estimation is based on asymptotic far-field wave patterns produced by a translating and oscillating source. The far-field wave pattern is governed by the parameter tau=omega(e)u(0)/g; For values of the parameter tau > 0.25 there exist a fan-shaped quiescent region in front of the vessel. As tau increases, the range of the fan-shaped quiescent region will be expanded. The critical line between the quiescent and wake region can be estimated by the asymptotic expressions theoretically. It is expected that there is no hydrodynamic interaction if the two ships are located in each other's fan-shaped quiescent region. But due to the near-field local waves produced by the 3-D ships, the critical line could be different from that estimated from asymptotic wave pattern. Therefore, we developed a 3-D panel method based on Rankine-type Green function to investigate the hydrodynamic interaction effects for several combinations of parameters, including oscillation frequency, forward speed and transverse distance between two ships. Finally, the critical line calculated numerically was presented and compared to the theoretical estimation. (C) 2016 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free