考虑粘性的三体船非线性横摇预报研究  

Nonlinear rolling prediction for trimaran ships considering viscous effect

作　　者：张艺瀚[1] 王平[1] 蔡新功[1] ZHANG Yi-han;WANG Ping;CAI Xin-gong(Marine Design & Research Institute of China, Shanghai 200011, China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011

出　　处：《船舶》2016年第6期12-18,共7页Ship & Boat

摘　　要：三体船主体与侧体之间的流动干扰以及舭龙骨等附体造成的漩涡分离,使其在波浪中运动时的横摇非线性效应更加强烈而复杂。应用CFD方法模拟某典型三体船在静水中的衰减和强迫横摇运动,得到非线性横摇阻尼并分析其变化规律。应用等效线性化原理修正并求解基于三维线性势流理论建立的横摇运动方程。研究结果与模型试验比较后得出,采用粘性流CFD方法并结合三维势流理论可较准确地预报三体船的非线性横摇阻尼和波浪中的横摇运动。The nonlinear effect is more intense and complex for the trimaran rolling in waves due to the disturbance between the main hull and side hulls, and the vortex shedding that is caused by the appendages as bilge keels. The roll decay and forced rolling in the calm water for a typical trimaran are simulated by CFD methods. The nonlinear roll damping is then obtained for the analysis of the roll damping rule. The trimaran rolling equation which is constructed by the three-dimensional (3D) potential flow theory is modified and solved by applying the equalization linearised theory. By comparison with the model test, the results show that the nonlinear roll damping and rolling in waves can be accurately predicted through the viscous flow CFD method combined with 3D potential flow theory by comparison with the model test results.

关 键 词：三体船 非线性横摇 三维势流理论 粘流理论 计算流体动力学 

分 类 号：U661.321[交通运输工程—船舶及航道工程]