Numerical and Experimental Investigations on the Dynamic Coupling Characteristics of a Novel Semisubmersible Floating-Oscillating-Buoy Wave Energy Converter System

IF 5.6 2区工程技术 Q1 ENGINEERING, CIVIL

IEEE Journal of Oceanic Engineering Pub Date : 2026-07-01 Epub Date: 2026-06-29 DOI:10.1109/JOE.2026.3695781

Pengyuan Sun;Hongzhou He;Xinhui Chen;Zhongqing Liu;Siyuan Zhan;Ye Li

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引用次数: 0

Abstract

This study develops a semisubmersible floating-oscillating-buoy wave energy converter (WEC), which integrates a semisubmersible platform with a hinged multibuoy cluster, tailored for Chinese offshore regions where wave energy density is approximately one-tenth of European levels. A comprehensive analytical–experimental framework is established to evaluate the coupled dynamic responses and wave power capture of the system under various power take-off (PTO) and arm-length configurations. The model validation is first conducted through the experimental data. Then, the influences of the PTO damping coefficient, PTO elastic coefficient, and actuating arm length on the power capture capability are explored using the analytical model. Ultimately, the optimal wave power absorption is obtained by comparing the root mean square (RMS) values of the extracted power in the PTO system under conditions of different coupling characteristic parameters and different wave frequencies. It is concluded that the power capture capacity of the system can be enhanced by appropriately adjusting the coupling parameters in response to the incident wave frequency. With

$\bar{c}$

= 0.2,

$\bar{k}$

= −0.05, and

$\overline {L\ } $

= 1.0 at ω = 1.56 rad/s, the optimal RMS capture power can reach 11.7 kW. Significantly, the analytical model is applicable to many hinged multifloating-body type WECs with a hydraulic PTO system, benefiting the optimal design and efficient operation of full-scale WEC prototypes in real sea conditions.

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一种新型半潜式浮动-振荡-浮筒波浪能转换系统动态耦合特性的数值与实验研究

本研究开发了一种半潜式浮动-振荡浮标波浪能转换器（WEC），它将一个半潜式平台与铰链式多浮标集群集成在一起，为波浪能量密度约为欧洲水平十分之一的中国近海地区量身定制。建立了一个综合的分析-实验框架，以评估系统在不同功率起飞（PTO）和臂长配置下的耦合动力响应和波浪能捕获。首先通过实验数据对模型进行验证。然后，利用解析模型探讨了PTO阻尼系数、PTO弹性系数和作动臂长度对电能捕获能力的影响。最后，通过比较不同耦合特性参数和不同波频条件下PTO系统中提取功率的均方根（RMS）值，得出最优波能吸收。结果表明，根据入射波频率适当调整耦合参数可以提高系统的电能捕获能力。ω = 1.56 rad/s时，当$\bar{c}$ = 0.2, $\bar{k}$ =−0.05,$\overline {L\ } $ = 1.0时，最佳RMS捕获功率可达11.7 kW。值得注意的是，该分析模型适用于许多带有液压PTO系统的铰接多浮体型WEC，有利于实际海况下全尺寸WEC原型机的优化设计和高效运行。

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

IEEE Journal of Oceanic Engineering 工程技术-工程：大洋

CiteScore

9.60

自引率

12.20%

发文量

审稿时长

12 months

期刊介绍： The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is the online-only quarterly publication of the IEEE Oceanic Engineering Society (IEEE OES). The scope of the Journal is the field of interest of the IEEE OES, which encompasses all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.