频率散射对船舶垂荡与纵摇耦合运动的影响  

Effects of the Frequency Scattering on Ship’s Pitch and Heave Coupling Motions

作　　者：黄昆仑[1][1] 朱军[1][1] 葛义军[1][1] 

机构地区：[1]海军工程大学 船舶与动力学院,湖北 武汉 430033

出　　处：《中国舰船研究》2012年第3期19-24,共6页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51179199)

摘　　要：为研究遭遇频率散射现象对船舶垂荡与纵摇耦合运动所造成的影响,以某船为研究对象,假设船舶在顶浪航行,通过船舶纵向速度振荡产生频率散射。基于弗汝德—克雷洛夫假定,推导并得到了垂荡与纵摇耦合运动响应方程。采用切片法计算了耦合运动方程中的水动力系数。通过理论求解方法验证了数值求解耦合运动方程的准确性。同时,还分析了散射强度和散射频率单独对耦合运动的影响,以及两者对耦合运动的综合影响。结果表明,增大散射强度和散射频率可以减弱垂荡和纵摇耦合运动及其剧烈程度。Assuming that the ship was at head sea,the phenomenon of the encounter frequency scattering was occurred by ship’s longitudinal velocity vibration.On the basis of the Froude-Krylov hypothesis,the coupling motion equations were obtained.Hydrodynamic coefficients of the coupling motion equations were calculated by Strip Method.The accuracy of results from numerical method was validated by theory meth od.The effects of ship scattering intensity and scattering frequency on the pitch and heave coupling mo tions were analyzed independently.The synthetical effects of the encounter frequency scattering on the pitch and heave coupling motions were obtained.The results of analysis show that the pitch and heave cou pling motions can be weakened by increasing of ship scattering intensity and scattering frequency.

关 键 词：船舶 波浪 纵摇与垂荡 频率散射 

分 类 号：U661.32[交通运输工程—船舶及航道工程]