Semi-submersible Offshore Coupled Motion in Irregular Waves  

作　　者：Baoji Zhang Ying Wang 

机构地区：[1]College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai,201306,China

出　　处：《Journal of Marine Science》2020年第2期27-37,共11页海洋科学杂志（英文）

基　　金：National Natural Science Foundation of China(No.51779135,51009087);Shanghai Natural Science Foundation of China(project approval number:14ZR1419500).

摘　　要：In order to predict the hydrodynamic performance of semi-submersible offshore platform accurately,based on CFD theory,continuous equation and N-S equation as the control equation,RNG type k-εmodel as turbulence model,using the finite difference method to discretize the control equation,using the Semi-Implicit Method for Pressure Linked Equation(SIMPLE)algorithm to solve the control equation,using the VOF method to capture the free surface.The numerical wave tank of irregular wave is established,and the wave force and motion response of the semi-submersible platform under irregular wave are studied.Based on the Jonswap spectrum density function,for a certain area of two irregular waves(South China sea,a-ten-year return period,a-hundred-year return period)sea condition,five wave direction Angle(0°,30°,45°,60°,90°),a total of 10 kinds of conditions of the motion response of semi-submersible platform are simulated,through analysis and comparison of simulation results,the influence law of wave angle,wave period and wave height on platform motion is obtained.Compared with the experimental values,the results of heave and pitch are close to the experimental data under the sea condition of 2,0 degree wave angles.The research results in this paper can provide reference for the design and motion response prediction of practical semi-submersible offshore platforms.

关 键 词：Semi-submersible offshore platform CFD method Irregular waves Motion response Wave force 

分 类 号：O17[理学—数学]