随机斜浪中船舶参数—强迫激励横摇运动计算  

Nonlinear Motion Response of Ship under Parametric Excitation and Forced Excitation in Random Quartering Seas

作　　者：唐友刚[1] 李红霞[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《中国舰船研究》2008年第1期5-8,共4页Chinese Journal of Ship Research

基　　金：国家自然科学基金(50279026)

摘　　要：研究船舶随机斜浪中大幅参数激励非线性横摇运动的计算方法。将船舶稳性高度GM作为时域变化的随机参数激励,波浪力为随机强迫激励项,建立船舶在随机斜浪航行情况的参—强激励横摇运动微分方程。参数激励项的求解考虑了船体型线、纵摇、升沉及波浪运动对稳性高度变化的影响。分别取不同波高、航速、航向,计算出随机斜浪中船舶的时域横摇运动响应。计算结果表明,此方法可以用于计算随机斜浪中船舶的参—强激励横摇运动,据此分析随机斜浪对船舶横摇和倾覆的重要影响。A method was developed to calculate ship＇s roll motion due to parametric and forced excitation. The differential equation of ship＇s parametrically and forcedly excited roll motion was estab- lished,taking the metacentric height GM-variation as a random parametrical excitation and the wave moment as the random forced excitation. The random parametrical excitation was calculated considering the hull form, pitch, heave and motions of the quartering waves, The responses of roll motion were obtained for the ship by different significant wave heights, ship speeds, heading angles and wave lengths, The results indicate that this approximation can be used to calculate the ship＇ s roll motion due to parametrical and forced excitation,and reveal the important effect of the random quartering wave on the ship rolling and capsizing.

关 键 词：船舶横摇 随机斜浪 参数激励 强迫激励 倾覆机理 

分 类 号：U661.22[交通运输工程—船舶及航道工程]