船舶参数横摇数值计算与力学机理分析  

Numerical calculation and mechanical mechanism analysis of ship parametric rolling

作　　者：朱军[1] 朱韬 王智宇[1] 夏齐强 黄昆仑[1] 葛义军[1] ZHU Jun;ZHU Tao;WANG Zhiyu;XIA Qiqiang;HUANG Kunlun;GE Yijun(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China;Institute of Specialized Services,Naval Research Academy,Shanghai 200235,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033 [2]海军研究院特种勤务研究所,上海200235

出　　处：《中国舰船研究》2020年第3期25-31,共7页Chinese Journal of Ship Research

基　　金：国家自然科学基金面上项目资助(51179199)。

摘　　要：[目的]参数横摇是船舶在波浪中的特殊失稳现象,现有研究认为,波浪经过船体时稳性参数的变化是激发船体横摇的主要原因,但其力学机理并不明确。[方法]首先,基于惯性坐标下的垂荡和纵摇耦合运动方程,以及船体坐标下的横摇运动方程,建立垂荡、纵摇和横摇的混合动力学模型;然后采用所提出的摇荡耦合切片计算方法,数值计算船舶参数横摇运动,分析数值计算的横摇运动规律,并基于能量原理提出发生参数横摇的衡准。[结果]研究结果表明,船舶发生参数横摇的力学机理是,在横摇角增大过程中回复力矩系数吸收的能量小于横摇角减小过程中回复力矩释放的能量;发生参数横摇的衡准是,回复力矩系数一阶谐波分量的相位角位于[0,π]内。[结论]明确参数横摇力学机理有助于深入认识参数横摇失稳模式的物理本质,提出的参数横摇衡准对于船舶第2代完整稳性衡准的制定具有参考意义。[Objective]The parametric rolling is a special instability phenomenon of ship in the wave.The current research proves that the change of the stability parameter when the wave passes through the hull is the reason for the rolling motion of the hull,but the mechanical mechanism is unclear.[Methods]Firstly,based on the equations of heave and pitch coupled motion in inertial coordinates and the equations of roll motion in hull coordinates,a hybrid dynamic model of heave pitch and roll was established;secondly,the proposed method of oscillating strip method was used to calculate the motion of ship parametric rolling numerically,and a criterion for parameter roll was proposed based on the principle of energy.[Results]The research results show that the mechanical mechanism for the occurrence of parametric rolling of a ship is that the energy absorbed by the recovery moment coefficient during the increase of the roll angle is less than the energy released by the recovery moment during the decrease of the roll angle;the criterion is that the phase angle of the first-order harmonic component of the recovery torque coefficient lies within[0,π].[Conclusions]Defining the mechanical mechanism of parametric roll is helpful to understand the physical nature of the parametric roll instability mode.The proposed parametric roll criterion is of reference significance for the development of the second generation intact stability criterion of the ship.

关 键 词：船舶 波浪 参数横摇 力学机理 

分 类 号：U661.33[交通运输工程—船舶及航道工程]