基于SESAM的半潜式平台水动力响应分析

Analysis on the Hydrodynamic Performance of the Semi-Submersible Platform Based on SESAM

根据三维势流理论,应用SESAM软件对国内某海域半潜式平台的水动力性能进行了研究。分析了目标平台在频域下的附加质量系数、阻尼系数,以及运动响应幅值(RAO)等一系列水动力参数,并研究了粘性阻尼对半潜式平台RAO的影响。结果表明,粘性阻尼对半潜式平台运动响应幅值有很大的影响,研究水动力性能时不能忽略。

Based on the three-dimensional potential fluid theory, the SESAM software from DNV is used to analyze the hydrodynamic behavior of a domestic semi-submersible platform. Through analysis, a series of hydrodynamic parameters of the target platform under the frequency domain are obtained, including additional mass and damping coefficients as well as response amplitude operator（RAO）. In addition, the influence of viscous damping on the RAO of the semi-submersible platform is investigated, which shows that the viscous force has significant effect on the hydrodynamic behavior of semi-submersibles and should not be ignored in the study work.