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斜浪群波中船舶复原力和参数横摇研究

DOI: 10.3969/j.issn.1006-7043. 201104033

Keywords: 波浪稳性, 参数横摇, 复原力, 群波, 斜浪

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Abstract:

为研究斜浪群波中船舶参数横摇及其与复原力变化的关系,基于切片理论,计算了船舶无横倾时在斜浪群波中时间序列垂荡和纵摇运动,确定出波面与船体的相对位置.利用3个坐标系之间的转换关系,求解斜浪群波中船体各横剖面左右舷与波面的交点,确定各浸水剖面瞬时湿面积.基于规则波中复原力计算公式,提出了Froude??Krylov假说下的群波中复原力计算方法.同时,利用作用在横倾船舶上的辐射力和绕射力,求出斜浪群波中船舶复原力之辐射力和绕射力部分.在复原力计算的基础上,确定一个参数横摇模型,实现斜浪群波中参数横摇计算.以一艘集装箱船为例,研究了斜浪群波中复原力变化以及参数横摇规律,结果表明斜浪群波中会发生参数横摇现象,且复原力变化幅度是影响参数横摇预报的一个重要因素.

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