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首页> 外文期刊>International Journal of Offshore and Polar Engineering >Radiation-Problem Solutions Using a Time-Domain Iterative HOBEM
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Radiation-Problem Solutions Using a Time-Domain Iterative HOBEM

机译：使用时域迭代HOBEM的辐射问题解决方案

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摘要

A higher-order boundary element method (HOBEM) for seakeeping problems in the framework of linear potential theory is newly developed and applied to predict hydrodynamic forces of a submerged prolate spheroid and a modified Wigley hull with forward speed. A rectangular computational domain moving with the same forward speed as the body is introduced, and only a half-domain is used for computation due to the geometric symmetry of a ship. The velocity potential on the body surface and the normal velocity on the free surface are obtained directly by solving the boundary integral equation, with the Rankine source used as the kernel function. An iterative time-marching scheme is employed in updating the kinematic and dynamic free-surface boundary conditions for numerical accuracy and stability. Extensive results, including the added-mass and damping coefficients, wave patterns, and pressure distribution for a submerged prolate spheroid and a modified Wigley hull, are presented. The corresponding radiation tests for the modified Wigley hull in heave and pitch motions in a towing tank are also conducted. Computed numerical results show good agreement with the corresponding experimental data and other numerical solutions.
机译：线性势能理论框架下的海事问题的高阶边界元方法（HOBEM）是最新开发的，并被用于预测水下扁球体和改进的Wigley船体的水动力。引入了以与主体相同的前进速度移动的矩形计算域，并且由于船舶的几何对称性，仅使用半域进行计算。通过求解边界积分方程，以兰金源作为核函数，可以直接获得人体表面的速度势和自由表面的法向速度。迭代时间行进方案用于更新运动学和动态自由表面边界条件，以提高数值精度和稳定性。提出了广泛的结果，包括浸入式扁球体和改进的Wigley船体的附加质量和阻尼系数，波型和压力分布。还对改进的Wigley船体在拖曳箱中的升沉和俯仰运动进行了相应的辐射测试。计算结果与相应的实验数据及其他数值解吻合良好。

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