基于内外场匹配法的20000TEU集装箱船非线性波浪载荷研究  

Analysis on nonlinear wave loads of a 20000 TEU container ship based on IORM

作　　者：蒙经淼 杨鹏 李金成[3] 刘敬喜 MENG Jingmiao;YANG Peng;LI Jincheng;LIU Jingxi(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Key Laboratory of Ship and Ocean Hydrodynamics of Hubei Province,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Second Ship Design and Research Institute,Wuhan 430205,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074 [2]华中科技大学船舶和海洋水动力学湖北省重点实验室,湖北武汉430074 [3]武汉第二船舶设计研究所,湖北武汉430205

出　　处：《中国舰船研究》2025年第2期214-226,共13页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(12372240);国家重点研发计划可再生能源技术专项资助项目(2022YFB4201502)。

摘　　要：[目的]旨在研究波高对船舶非线性波浪载荷的影响。[方法]以一艘20000TEU集装箱船为研究对象,首先,对其在不同波高下的波浪载荷进行数值研究。基于刚体理论,采用三维边界元和内外场匹配法计算流体场速度势和波浪激振力,并对自由面的范围和网格划分进行收敛性分析。进一步地,分别考虑湿表面引起的波浪激励力与静水恢复力这2种非线性因素,采用三维非线性时域方法研究不同波高的非线性因素对船舶运动和波浪载荷的影响。[结果]结果显示,船体剖面波浪外载荷的非线性现象比船体运动更为显著,且随着波高的增加,船舶的倍频响应也增大。[结论]船舶非线性波浪载荷的倍频现象由船体湿表面变化引起的非线性波浪激励力和静水恢复力共同作用所致,其对波浪载荷量值和循环次数以及结构疲劳损伤的影响较大。因此,在实际工程设计阶段,需充分考虑船体载荷的倍频响应成分,以提高船舶安全性设计水平。[Objective]The aim of this paper is to study the influence of wave height on nonlinear wave loads on ships.[Methods]A 20000 TEU container ship is selected as the research object.First,numerical research on ship wave loads under different wave heights is carried out.Based on the rigid body theory,the three-dimensional boundary element method and inner and outer region matching method(IORM)are adopted to calculate the velocity potential and wave excitation forces,and convergence analysis of the free surface range and grid division is also performed.Furthermore,the nonlinear factors of wave excitation force caused by the wetted surface and the hydrostatic restoring force are considered.A three-dimensional nonlinear timedomain method is employed to analyze the effects of these nonlinear factors on ship motion and wave loads under different wave heights.[Results]The results show that the nonlinearity of wave loads on the ship's sectional profile is more pronounced than that of ship motion,and the ship's second-harmonic response increases with wave height.[Conclusions]The second-harmonic phenomenon of nonlinear wave loads is mainly caused by the interaction of the nonlinear wave excitation force due to the changing wetted surface and the hydrostatic restoring force.This phenomenon significantly affects the magnitude of wave loads,the number of load cycles,and structural fatigue damage.Therefore,it is necessary to consider the second-harmonic response components of ship loads in the engineering design stage to enhance ship safety.

关 键 词：集装箱船 动态响应 运动响应 波浪载荷 非线性 水弹性 时域分析 内外场匹配法 

分 类 号：U661.1[交通运输工程—船舶及航道工程]