波浪对船舶非线性横摇阻尼的影响  

Effect of Waves on Nonlinear Rolling Damping of Ship

作　　者：李远林[1] 吴家鸣[1] 王冬姣[1] 

机构地区：[1]华南理工大学交通学院

出　　处：《船舶工程》2003年第2期21-24,共4页Ship Engineering

基　　金：国家自然科学基金资助项目 (编号 10 0 72 0 2 1)

摘　　要：横摇非线性阻尼通常是在静水中进行横摇衰减试验确定。本文通过在波浪水池中进行不规则波的船模横摇衰减试验 ,研究了波浪对非线性横摇阻尼的影响。研究发现波浪的存在使横摇阻尼线性部分减少 ,非线性部分增加 ;采用随机减量法得到非线性横摇阻尼时 ,门槛值不同所得到的阻尼也不相同 ,一般说来 ,门槛值越大 ,阻尼非线性成分增加 。The nonlinear rolling damping of a ship is usually determined by rolling attenuation test in calm water.In this paper,the effect of waves on nonlinear rolling damping is researched experimentally through attenuation test of a model ship rolling in irregular waves in a wave tank.It is found that the nonlinear portion of rolling damping is increased while the linear portion of it decreased during the model ship's rolling in waves;the values of rolling damping vary with different thresholds when a random decrement technique is used,in general,the nonlinear damping is increased and the linear one decreased with the increase of thresholds.

关 键 词：船舶 非线性横摇阻尼 波浪 模型试验 

分 类 号：U661.32[交通运输工程—船舶及航道工程]