波浪中载液船舶运动的时域模拟  

Simulation of Ship Motions Coupled with Tank Sloshing in Time Domain

作　　者：李裕龙[1] 朱仁传[1] 缪国平 范菊[1] 范佘明[2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,海洋工程国家重点试验室,上海200240 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《上海交通大学学报》2012年第3期379-384,共6页Journal of Shanghai Jiaotong University

摘　　要：基于势流理论,采用切片法和脉冲响应函数方法实现船体时域运动,同时采用黏性流理论模拟计算舱内液体的非线性晃荡,进而建立了波浪中载液船舶耦合运动方程.该方法考虑了波浪、船体、液舱晃荡之间的耦合作用,并结合船体内外流场特点分别采用了势流和黏性流理论,具有较高的计算效率.研究结果表明:通过数值模拟计算和模型实验,数值模拟计算能够清晰显现液舱晃荡对船体全局运动影响,船体运动响应曲线与模型实验结果吻合良好.Tank sloshing in ship cargo is excited by ship motions,in the meantime the sloshing flow induces impact load on tank wall,then affects the ship motion.Time domain ship motion was solved by using strip method and an impulse response function method based on the potential flow theory.Viscous flow theory was employed to simulate the nonlinear tank sloshing.Then the ship motion coupled with tank sloshing was established that the interactions of wave,ship body and tank sloshing are completely taken into considerations.This method has quite high efficiency for it takes advantage of potential flow theory for outer flow field and viscous flow theory for inside tank sloshing respectively.The numerical simulation and experimental studies indicate that the numerical results of ship motion coupled with tank sloshing can clearly shows the coupling effect of tank sloshing on the ship global motion.The results of the ship motion RAO of both computational and experiment ones are in good agreement.

关 键 词：液舱晃荡 脉冲响应函数 有限体积法 运动耦合 时域模拟 

分 类 号：O35[理学—流体力学]