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首页> 外文会议>25th International Conference on Offshore Mechanics and Arctic Engineering 2006(OMAE2006) vol.1 >WAVE-CURRENT LOADING ON A VERTICAL SLENDER CYLINDER BY TWO DIFFERENT NUMERICAL MODELS
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WAVE-CURRENT LOADING ON A VERTICAL SLENDER CYLINDER BY TWO DIFFERENT NUMERICAL MODELS

机译：通过两种不同的数值模型在垂直滑台圆柱上的波电流载荷

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The study of the effects resulting from the interaction of a combined wave-current field with any ocean structure is important for the design and performance evaluation of that structure. The prudent computation of forces exerted by waves and currents is an essential task in the study of the stability of an offshore structure.rnA study on the loading of an oblique wave and a current field on a fixed vertical slender cylinder in a 3D flow frame is illustrated in Zaman and Baddour (2004). The three dimensional expressions describing the characteristics of the combined wave-current field in terms of mass, momentum and energy flux conservation equations are formulated. The parameters before the interaction of the oblique wave-free uniform current and current-free wave are used to formulate the kinematics of the flow field. These expressions are also employed to formulate and calculate the loads imparted by the wave-current fluid flow on a bottom mounted slender vertical cylinder. In this work a 2D version of the above 3D model called here Model-I has been used for the numerical computations presented in this paper.rnThe second model denoted model-II in the present paper is based on Euler equations. This model is formulated through the vertical integration of the continuity equation and the equations of motions, Zaman et al (1997). A semi-implicit numerical technique is employed for the numerical solution.rnIn the present paper comparisons are made between the results obtained from the 2D version of the above models in finite depth. Both models are then compared with some relevant experimental data. Morison et al equation (1950) is deployed for the load computations in all cases.
机译：研究组合波流场与任何海洋结构相互作用所产生的影响对于该结构的设计和性能评估非常重要。对波浪和水流施加的力进行谨慎的计算是研究海上结构稳定性的重要任务。rn关于在3D流框架中固定垂直细长圆柱体上的斜波载荷和流场的研究是Zaman和Baddour（2004）中的插图。提出了用质量，动量和能量通量守恒方程描述组合波流场特征的三维表达式。无斜波均匀电流和无电流波相互作用之前的参数被用来表示流场的运动学。这些表达式也可用来公式化和计算由波浪流动的流体在底部安装的细长垂直圆柱体上施加的载荷。在这项工作中，上述3D模型的2D版本（这里称为Model-I）已用于本文提出的数值计算。rn本文中称为模型II的第二个模型基于Euler方程。该模型是通过对连续性方程和运动方程进行垂直积分而形成的，Zaman等人（1997年）。数值解采用半隐式数值技术。本文对上述模型在有限深度下的二维版本得到的结果进行了比较。然后将这两个模型与一些相关的实验数据进行比较。在所有情况下，均采用Morison等式（1950）进行载荷计算。

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