Hydroelastic theory for offshore floating plates of variable flexural rigidity

IF 3.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Journal of Fluids and Structures Pub Date : 2024-01-08 DOI:10.1016/j.jfluidstructs.2023.104060

S. Michele , S. Zheng , E. Renzi , A.G.L. Borthwick , D.M. Greaves

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Abstract

We present a theoretical model of the hydrodynamic behaviour of a floating flexible plate of variable flexural rigidity connected to the seabed by a spring/damper system. Decomposition of the response modes into rigid and bending elastic components allows us to investigate the hydroelastic behaviour of the plate subject to monochromatic incident free-surface waves of constant amplitude. We show that spatially dependent plate stiffness affects the eigenfrequencies and modal shapes, with direct consequences on plate dynamics and wave power extraction efficiency. We also examine how plate length and Power Take-Off (PTO) distribution affect the response of the system and its consequent absorbed energy. This work highlights the need to improve existing models of flexible floating energy platforms, especially given their importance in the Offshore Renewable Energy (ORE) sector.

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挠曲刚度可变的海上浮板的水弹性理论

我们提出了一个通过弹簧/阻尼器系统与海床相连的可变挠曲刚度浮动柔性板的水动力行为理论模型。通过将响应模式分解为刚性和弯曲弹性部分，我们可以研究板在恒定振幅的单色入射自由表面波作用下的水弹性行为。我们发现，与空间相关的板刚度会影响特征频率和模态形状，从而对板动力学和波动力提取效率产生直接影响。我们还研究了板的长度和功率提取（PTO）分布如何影响系统的响应及其吸收的能量。这项研究强调了改进现有柔性浮动能源平台模型的必要性，尤其是考虑到这些平台在近海可再生能源（ORE）领域的重要性。

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来源期刊

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.