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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Prediction and measurement of the roll motion of a sailing yacht at zero forward speed
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Prediction and measurement of the roll motion of a sailing yacht at zero forward speed

机译：帆船在零前进速度下的侧倾运动的预测和测量

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The roll motion of a yacht at zero Froude number is investigated, motivated by limitations of existing theoretical models of roll motion when applied to bodies with large appendages. A time domain single degree of freedom roll model has been developed in order to identify the dominant excitation and damping sources. The canoe body forces were determined from a wave diffraction program whilst the appendages were treated as fully submerged flat plates. Calculation of the forces acting was based on a stripwise Morison formulation. A series of full scale validation experiments has also been conducted. in calin water and in ocean waves. The results show that the keel, rudder and sail dominate the damping, whilst the canoe body contributes very little. The hydrodynamic damping is non-linear with respect to wave amplitude. but the overall damping with a sail hoisted is only weakly nonlinear with respect to wave amplitude because the sail dominates the damping. particularly in a wind field. The numerical model predicts a strong influence of wave heading which is not borne out by the full scale trials. (C) 2003 Published by Elsevier Science Inc. [References: 16]
机译：研究了游艇在零弗鲁德数下的侧倾运动，这是由于将现有的侧倾运动理论模型应用于具有大附件的车身时受到限制而引起的。为了确定主要的激励和阻尼源，已经开发了时域单自由度侧倾模型。从波浪衍射程序确定独木舟体力，而将附件视为完全浸没的平板。作用力的计算基于条带式莫里森公式。还进行了一系列的全面验证实验。在卡林水和海浪中。结果表明，龙骨，舵和帆起着主导作用，而独木舟的作用很小。流体动力阻尼相对于波幅是非线性的。但是，相对于波幅，吊装风帆的总体阻尼仅是弱非线性的，因为风帆主导阻尼。特别是在风场中。数值模型预测了波浪方向的强大影响，但尚未通过全面试验得到证实。 （C）2003年由Elsevier Science Inc.出版。[参考：16]

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