Semi-submersible Offshore Coupled Motion in Irregular Waves

作     者：Baoji Zhang Ying Wang 

作者机构：College of Ocean Science and EngineeringShanghai Maritime UniversityShanghai201306China 

出 版 物：《Journal of Marine Science》 (海洋科学杂志（英文）)

年 卷 期：2020年第2卷第2期

页      面：27-37页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

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

主　　题：Semi-submersible offshore platform CFD method Irregular waves Motion response Wave force 

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 *** numerical wave tank of irregular wave is established,and the wave force and motion response of the semi-submersible platform under irregular wave are *** 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 *** 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 *** research results in this paper can provide reference for the design and motion response prediction of practical semi-submersible offshore platforms.