不规则波中船舶横摇参激振动敏感度分析  

Sensitivity analysis of parametric roll resonance in for ships irregular waves

作　　者：张晓[1] 杨和振[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《哈尔滨工程大学学报》2015年第12期1539-1543,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51379005;51009093)

摘　　要：利用庞加莱图分析了不规则波中船舶横摇参激稳定性对设计参数的敏感度。船舶在波浪中运动产生的时变稳性高使船舶横摇处于参激不稳定状态,激励引起大角度横摇运动。不规则波下的船舶参数横摇分析存在较多挑战。以巴拿马型集装箱船为例,依据具有非线性阻尼和非线性回复力矩的非线性横摇运动方程,采用动力学庞加莱图,针对规则波和不规则波2种情况,分析了船舶横摇幅值对设计变量的敏感度。分析表明,不规则波与规则波中的参数敏感度有所不同,线性横摇阻尼和非线性回复力矩对不同波浪条件下的横摇幅值影响不同,依据不规则波浪进行船舶参数横摇的分析研究有着不可替代的意义。同时,横摇幅值对非线阻尼是不敏感的。To study the parametric instability of ship rolling in irregular waves, sensitivity analysis of roll motion against design variables was conducted using the Poincare map. Metacentric height varying with ship motion in waves, led to parametrically excited instability and large ship roll motion. Analysis of ship parametric roll resonance in irregular waves still has many challenges. Sensitivity analysis both regular and irregular waves, was conducted for a Panamax of ship roll amplitude against design variables, with container ship by Poincare map. Poincare map was generally used for dynamic analysis. The nonlinear roll equations considered nonlinear damping and nonlinear resto- ring moment. The results show that the sensitivity in irregular waves is different from that in regular waves. The in- fluence of linear roll damping and nonlinear restoring moment on ship rolling amplitude varies with different wave conditions. Exploration of ship parametric rolling in irregular waves is of irreplaceable significance for ship design. In addition, roll amplitude is not sensitive to nonlinear roll damping.

关 键 词：不规则波 非线性船舶运动 参数横摇 庞加莱图 参激振动 船舶稳性 敏感性分析 

分 类 号：U661.32[交通运输工程—船舶及航道工程]