基于频域高阶Rankine源法的有航速船舶斜浪中六自由度运动数值计算研究  

Numerical study on 6-DOF motions of ships advancing in oblique waves by frequency-domain higher-order Rankine source method

作　　者：杨云涛 朱仁传[2] 陆安 高慧[1] YANG Yun-tao;ZHU Ren-chuan;LU An;GAO Hui(School of Naval Architecture and Civil Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engi-neering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]江苏科技大学船舶与建筑工程学院,江苏张家港215600 [2]上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室,上海200240

出　　处：《船舶力学》2022年第11期1668-1679,共12页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(52101357);江苏省高等学校基础科学(自然科学)研究项目资助(21KJB580012);江苏科技大学科研启动基金项目。

摘　　要：针对船舶斜浪航行时的六自由度运动预报,本文在频域势流理论框架下,采用高阶Rankine源法求解考虑定常绕流影响的绕辐射问题,建立多自由度耦合运动计算模型。为计及流体粘性对横摇运动的影响,基于计算流体力学理论对船舶自由横摇衰减运动进行模拟,经能量法处理求取横摇阻尼系数,并将其引入频域运动方程。在此基础上,自主开发船舶在规则波中斜浪航行时运动响应的数值计算程序。为验证方法和程序的可靠性,对S175集装箱船在遭遇浪向为150°时的垂荡、横摇和纵摇运动进行模拟,通过与基于移动脉动源的数值方法及试验结果的对比发现,本文方法计算稳定,且由于考虑了定常绕流的耦合影响,在共振频率附近的预报值与试验更为接近。进一步对不同浪向下S175以及肥大的S-Cb84散货船的六自由度运动进行数值计算与分析,结果显示数值解与试验值吻合良好。本文方法对于不同浪向和船型均有着广泛的适用性。In order to predict the 6-DOF motions of ships advancing in oblique waves,the frequency-do⁃main higher-order Rankine source method was adopted to solve the diffraction and radiation including steady flow effects,and a multi-degree-of-freedom computational model was established.In this model,the influ⁃ence of fluid viscosity on roll motion was considered by introducing additional viscous roll damping coeffi⁃cient,which was solved by using the energy method to deal with the free rolling decay curve obtained based on the computational fluid dynamics theory,into the motion equations in frequency domain.On the basis of the above method,a computer code was developed.Numerical simulations were first conducted on the heave,roll and pitch motions of S175 in bow oblique waves(β=150°).By comparing the present results with the experimental data and numerical solutions obtained from the methods using the translating-pulsating Green’s function,it is found that the present method is of better stability and has a higher prediction precision near the resonant frequency due to its consideration of steady flow effects.Then further investigations were con⁃ducted on the 6-DOF motions of of S175 and a full formed bulk carrier S-Cb84 with different headings.The good agreement between numerical results and experimental data shows that the present method can be ap⁃plied to various ship types at different heading angles.

关 键 词：频域高阶Rankine源法 斜浪 六自由度运动 横摇阻尼 

分 类 号：U661.32[交通运输工程—船舶及航道工程]