Roundness and slenderness effects on the dynamic characteristics of spar-type floating offshore wind turbine

IF 1.1 Q4 MECHANICS

Curved and Layered Structures Pub Date : 2023-01-01 DOI:10.1515/cls-2022-0213

R. Adiputra, Faiz Nur Fauzi, Nurman Firdaus, Eko Marta Suyanto, Afian Kasharjanto, Navik Puryantini, Erwandi Erwandi, Rasgianti Rasgianti, Aditya Rio Prabowo

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引用次数: 0

Abstract

Abstract Spar-type floating offshore wind turbine has been massively developed considering its design simplicity and stability to withstand the wave-induced motion. However, the variation of the local sea level and the readiness of supporting production facilities demand the spar design to adapt in a viable way. Considering this, the present article investigated how the slenderness (length over diameter ratio) and the roundness of cross section influence the hydrodynamic characteristics, which are the crucial parameters of floater performances. The OC3-Hywind spar-type floating platform was adapted as the reference model. The length of the reference floater was then varied with a ratio of 1.5, 2, 2.5, and 3 and the diameter was proportionally scaled to obtain constant buoyancy. The number of the sides which indicated the roundness of the cross section was varied to be 4, 6, 8, 10, 12, 14, and infinity (cylindrical shape). The analysis was conducted using potential flow theory in a boundary element method solver through an open-source code NEMOH. Initially, panel convergence was conducted and compared with the experimental results of the reference model to obtain the appropriate simulation settings before being used for the case configuration analysis. Results stated that the roundness effect with sides greater than 16 had little effect on dynamic characteristics. Meanwhile, the spar with the largest diameter was more stable against the translational motion.

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圆度和长细比对浮筒式海上风力发电机动态特性的影响

摘要考虑到Spar型浮动海上风力涡轮机设计的简单性和稳定性，以承受波浪引起的运动，该涡轮机已被大规模开发。然而，当地海平面的变化和配套生产设施的准备情况要求翼梁设计以可行的方式进行调整。考虑到这一点，本文研究了长径比和横截面圆度如何影响水动力特性，这是影响浮子性能的关键参数。采用OC3 Hywind翼梁式浮动平台作为参考模型。然后以1.5、2、2.5和3的比例改变参考浮子的长度，并按比例缩放直径以获得恒定浮力。表示截面圆度的边的数量变化为4、6、8、10、12、14和无穷大（圆柱形）。该分析是通过开源代码NEMOH在边界元法求解器中使用势流理论进行的。最初，进行面板收敛，并与参考模型的实验结果进行比较，以获得合适的模拟设置，然后再用于案例配置分析。结果表明，侧面大于16的圆度效应对动态特性影响不大。同时，直径最大的翼梁在抵抗平移运动时更稳定。

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

Curved and Layered Structures MECHANICS-

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

14 weeks

期刊介绍： The aim of Curved and Layered Structures is to become a premier source of knowledge and a worldwide-recognized platform of research and knowledge exchange for scientists of different disciplinary origins and backgrounds (e.g., civil, mechanical, marine, aerospace engineers and architects). The journal publishes research papers from a broad range of topics and approaches including structural mechanics, computational mechanics, engineering structures, architectural design, wind engineering, aerospace engineering, naval engineering, structural stability, structural dynamics, structural stability/reliability, experimental modeling and smart structures. Therefore, the Journal accepts both theoretical and applied contributions in all subfields of structural mechanics as long as they contribute in a broad sense to the core theme.