利用平滑粒子流体力学建立垂直圆柱体在陡浪和破浪中动态响应的数值模型

IF 3.4 2区 工程技术 Q1 ENGINEERING, MECHANICAL Journal of Fluids and Structures Pub Date : 2024-01-20 DOI:10.1016/j.jfluidstructs.2023.104049
Yong Yang , Aaron English , Benedict D. Rogers , Peter K. Stansby , Dimitris Stagonas , Eugeny Buldakov , Samuel Draycott
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引用次数: 0

摘要

高度非线性的近断裂和溢出断裂波群是海洋中常见的极端事件。在这些极端波浪条件下,基于数值方法对近海和海洋结构进行精确的力预测仍然是一个具有重要现实意义的问题。以往的数值研究大多集中于刚性结构上的非破碎波力。本文利用平滑粒子流体力学(SPH)方法解决了这一问题,并使用基于 SPH 的 DualSPHysics 求解器开发和验证了一个高度非线性的流体力学模型,用于近破浪和溢出破浪与垂直圆柱形结构的相互作用。应用开放边界生成极端波浪条件。在另一个数值模型中预先计算出的自由表面高程和流动运动学参数被用作一个较小的基于 SPH 的三维数值模型入口处的边界条件,以复制在物理波槽中产生的近破浪和溢出破浪。用于吸收波浪的阻尼区布置在出口前的区域末端。数值结果与垂直圆柱体上的表面高程和水平力的实验测量结果进行了验证,结果表明两者一致。在对圆柱体的固定模型进行验证后,使用动态模型研究了对极端波浪事件的响应。数值结果还表明,溢出的破浪力与近破浪力相比要大得多,而且在本研究中的动态响应中,二次载荷循环现象也变得更大。
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Numerical modelling of a vertical cylinder with dynamic response in steep and breaking waves using smoothed particle hydrodynamics

Highly nonlinear near-breaking and spilling breaking wave groups are common extreme events in the ocean. Accurate force prediction on offshore and ocean structures in these extreme wave conditions based on numerical approaches remains a problem of great practical importance. Most previous numerical studies have concentrated on non-breaking wave forces on rigid structures. Taking advantage of the smoothed particle hydrodynamics (SPH) method, this paper addresses this problem and presents the development and validation of a numerical model for highly nonlinear hydrodynamics of near-breaking and spilling breaking waves interacting with a vertical cylindrical structure using the SPH-based DualSPHysics solver. Open boundaries are applied for the generation of extreme wave conditions. The free-surface elevation and flow kinematics pre-computed within another numerical model are used as boundary conditions at the inlet of a smaller 3-D SPH-based numerical model to replicate the near-breaking and spilling breaking waves generated in a physical wave flume. A damping zone used for wave absorption is arranged at the end of the domain before the outlet. Numerical results are validated against experimental measurements of surface elevation and horizontal force on the vertical cylinder, demonstrating an agreement. After validation using a fixed model for the cylinder, a dynamic model is used to study the response to extreme wave events. Numerical results have also shown that the spilling breaking wave forces are significantly larger compared with near-breaking wave forces, and the secondary load cycle phenomenon becomes larger with dynamic response included in the present study.

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来源期刊
Journal of Fluids and Structures
Journal of Fluids and Structures 工程技术-工程:机械
CiteScore
6.90
自引率
8.30%
发文量
173
审稿时长
65 days
期刊介绍: The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved. The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.
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