Assessing the dynamic behavior of multiconnected offshore floating photovoltaic systems under combined wave-wind loads: A comprehensive numerical analysis

Chaojun Yan , Wei Shi , Xu Han , Xin Li , Amrit Shankar Verma
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Abstract

Floating photovoltaic (FPV) systems have garnered considerable interest due to their numerous benefits. However, the mechanical design of these systems remains underexplored in existing literatures, necessitating further investigation before they can be commercially deployed in ocean environments. In this study, a novel modular offshore FPV solution was proposed, and numerical modeling and hydrodynamic coupling analysis of multi-body FPV systems were conducted to assess the relative behavior of multi-connected FPV modules under combined wave-wind conditions. Initially, the multi-connected system was modeled, taking into account fixed and hinged connection boundary conditions (BC). Utilizing frequency-domain analysis, the hydrodynamic coefficients essential for time-domain analysis were derived. Subsequently, the overall hydrodynamic performance and behavioral characteristics of various FPV platform types were evaluated. In addition, the strength of connectors under extreme conditions were assessed. Lastly, we compared the motion responses of the multi-body platform under different connection BCs and wave headings. It has been proven that the joint of the hinged connector will generate additional moments, which will affect the dynamic response of the platform as an excitation load. Moreover, the connector's structural responses were mainly dominated by the motion response of the FPV platforms. Furthermore, for the multi-body FPV systems, 0° wave heading should be avoided for installation to reduce the motion responses and structural responses. This study provides valuable insights into the mechanical design of FPV systems for ocean deployment.

多连接海上浮动光伏系统在波浪-风联合荷载作用下的动态性能评估:综合数值分析
浮动光伏(FPV)系统由于其众多的优点而引起了人们的极大兴趣。然而,在现有文献中,这些系统的机械设计仍然没有得到充分的探索,在将其商业化部署在海洋环境中之前,需要进行进一步的研究。在这项研究中,提出了一种新的模块化海上FPV解决方案,并对多体FPV系统进行了数值建模和流体动力学耦合分析,以评估多连接FPV模块在组合波风条件下的相对行为。最初,在考虑固定和铰接连接边界条件(BC)的情况下,对多连接系统进行建模。利用频域分析,导出了时域分析所必需的水动力系数。随后,对各种FPV平台类型的整体水动力性能和行为特征进行了评估。此外,还评估了连接器在极端条件下的强度。最后,我们比较了多体平台在不同连接BCs和波浪航向下的运动响应。已经证明,铰接连接器的接头会产生额外的力矩,这将影响平台作为激励负载的动态响应。此外,连接器的结构响应主要由FPV平台的运动响应决定。此外,对于多体FPV系统,安装时应避免0°波航向,以减少运动响应和结构响应。这项研究为用于海洋部署的FPV系统的机械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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