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Hydrodynamic characteristics of a fixed semi-submersible platform interacting with incident waves by fully nonlinear method
International Journal of Naval Architecture and Ocean Engineering ( IF 2.2 ) Pub Date : 2021-06-19 , DOI: 10.1016/j.ijnaoe.2021.06.003
Zi-Lin Zhang , Hong-Tao Yuan , Shi-Li Sun , Hui-Long Ren

Based on the potential flow theory, a fully nonlinear numerical procedure is developed with boundary element method to analyze the interaction between a fixed semi-submersible platform and incident waves in open water. The incident wave is separated from the scattered wave under fully nonlinear boundary conditions. The mixed Euler-Lagrangian method is used to capture the position of the disturbed wave surface in local coordinate systems. The wave forces exerted on an inverted conical frustum are used to ensure the accuracy of the present method and good agreements with published results are obtained. The hydrodynamic characteristics of the semi-submersible platform interacting with regular waves are analyzed. Pressure distribution with time and space, tension and compression of the platform under wave action are investigated. 3D behaviors of wave run-ups are predicted. Strong nonlinear phenomena such as wave upwelling and wave interference are observed and analyzed.



中文翻译:

固定半潜平台与入射波相互作用的全非线性方法水动力特性

基于势流理论,采用边界元法开发了一种全非线性数值程序,用于分析固定半潜平台与开阔水域入射波之间的相互作用。在完全非线性边界条件下,入射波与散射波分离。混合欧拉-拉格朗日方法用于捕捉受扰波面在局部坐标系中的位置。施加在倒圆锥截头体上的波浪力用于确保本方法的准确性,并获得与已发表结果的良好一致性。分析了半潜式平台与规则波浪相互作用的水动力特性。研究了平台在波浪作用下的压力随时间和空间的分布、张力和压缩。预测波浪爬升的 3D 行为。观测和分析了强非线性现象,如波浪上涌和波浪干涉。

更新日期:2021-07-24
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