考虑定常兴波影响的辐射问题去奇Rankine源方法数值计算

发布时间：2018-06-10 00:26

本文选题：去奇Rankine源方法 + 非线性兴波　；参考：《船舶工程》2016年02期

【摘要】：随着中高速船舶在海洋资源开发中的广泛应用,航速对船舶在波浪中摇荡运动的影响受到重视。基于势流理论,采用非均匀有理B样条(NURBS)表达物面,应用去奇Rankine源方法求解流场速度势;推导了兴波问题的二阶近似非线性自由面边界条件,以及考虑二阶近似非线性兴波影响的辐射速度势的线性自由面和物面边界条件。首先数值计算了Wigley船型的近似非线性兴波问题,将计算的线性和非线性兴波阻力系数与文献结果做了比较,然后数值计算了计及线性定常兴波影响的下潜圆球有航速辐射问题,将计算的附加质量和阻尼系数与文献结果比较,计算结果与文献结果吻合程度较好,验证了数值计算方法的有效性。
[Abstract]:With the wide application of medium-high speed ships in the exploitation of marine resources, the influence of speed on the ship's rocking motion in waves has been paid more attention. Based on the potential flow theory, the nonuniform rational B-spline Nurbs is used to express the object surface, the de-odd Rankine source method is used to solve the velocity potential of the flow field, and the second-order approximate nonlinear free surface boundary conditions for the wave-making problem are derived. And the boundary conditions of the free surface and the object surface considering the radiation velocity potential of the second order approximate nonlinear wave-making. At first, the approximate nonlinear wave-making problem of Wigley ship form is numerically calculated, and the calculated linear and nonlinear wave-making resistance coefficients are compared with the results in the literature. Then, the problem of underwater sphere velocity radiation considering the influence of linear constant wave-making is numerically calculated. The calculated additional mass and damping coefficient are compared with the results of the literature, and the results are in good agreement with the results of the literature. The validity of the numerical method is verified.
【作者单位】：武汉理工大学高性能舰船技术教育部重点实验室;武汉理工大学交通学院船舶、海洋与结构工程系;上海交通大学船舶海洋与建筑工程学院;上海交通大学海洋工程国家重点实验室;中船重工(武汉)船舶与海洋工程装备设计有限公司;
【分类号】：U661

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