Numerical study of wave forces on truncated cylinder arrays generated by focused waves

IF 5.1 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2025-08-05 DOI:10.1016/j.marstruc.2025.103907

Qinghe Fang , Hui Wang , Hanchen Zhang , Chunhui Liu , Yongfu Wu , Zaixian Chen , Anxin Guo

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引用次数: 0

Abstract

Vertical cylinders are commonly used as foundation supports in offshore engineering. Wave forces on a single cylinder have been widely studied and developed into methods for calculating wave loads. However, wave forces on truncated cylinder arrays, representing floating foundations, have been rarely investigated. In this study, the wave forces on truncated cylinder arrays in 2 × 2 and 4 × 4 configurations generated by focused waves were numerically studied. The numerical model was established with the volume of fluid (VOF) method and the k-ω SST turbulence model based on OpenFOAM. The model accuracy was validated against experimental data from literature. The array effect was discussed by comparing the characteristics of wave forces on truncated cylinders at different positions. It was found that there is a nonlinear relationship between wave forces on cylinder arrays and wave amplitude. The wave force distributions of cylinder arrays show strong symmetry relative to wave incidence, with minimal amplitude variations across columns, while enlarged arrays amplify phase modulation. Surrounding cylinders provide significant sheltering effects to inner cylinders. Besides, the spectra of wave force on truncated cylinders were modulated by the spectral characteristics of incident focused waves. An empirical prediction method based on peak wave frequency was proposed to estimate dimensionless wave forces and their spatial distribution within cylinder arrays. This study enhances the understanding of wave force distributions on cylinder arrays under extreme wave and provides valuable insights into structural design of offshore structures.

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聚焦波对截短圆柱阵列波浪力的数值研究

垂直圆柱体是海洋工程中常用的基础支撑形式。波浪力在单个圆柱体上的作用得到了广泛的研究，并发展成为计算波浪荷载的方法。然而，对代表浮动基础的截短圆柱阵列的波浪力很少进行研究。本文研究了聚焦波对2 × 2和4 × 4两种构型截短圆柱阵列产生的波浪力。采用流体体积法（VOF）和基于OpenFOAM的k-ω SST湍流模型建立了数值模型。通过文献中的实验数据验证了模型的准确性。通过比较不同位置截圆柱上波浪力的特性，讨论了阵列效应。结果表明，圆柱阵列波浪力与波浪幅值之间存在非线性关系。圆柱阵列的波力分布相对于入射波表现出很强的对称性，柱间振幅变化最小，而放大后的阵列放大了相位调制。外筒对内筒具有显著的遮蔽作用。此外，截断柱体上的波浪力谱受到入射聚焦波谱特征的调制。提出了一种基于波浪峰值频率的经验预测方法，用于估计柱体阵列内无量纲波浪力及其空间分布。该研究增强了对极端波浪作用下圆柱阵列波浪力分布的认识，为海上结构设计提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.