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<p>The integrated floating energy system (IFES) comprising floating offshore wind turbines (FOWTs) and wave energy converters (WECs) presents a promising solution for reducing energy costs and enhancing motion stability. This study develops an innovative barge-type IFES integrated with multiple Wavestar prototype WECs to address this research need. A fully coupled framework is proposed for the aero-hydro-servo-elastic dynamic analysis of the wind-wave IFES concept under environmental conditions. The study analyzes time-varying platform motions and power characteristics of the IFES concepts compared to the FOWT. Results indicate that the standard deviations of platform roll and pitch decrease significantly due to the WEC integration under the most examined load cases (LCs). The system achieves a maximum reduction of 71.04% in rolling fluctuation under 16 m/s wind speed, while platform pitch decreases by 49.65%. The IFES demonstrates increased output power across all examined LCs, while tower-base loads decrease by over 20% under a wind velocity of 11 m/s. Additionally, the results indicate that the rotational dynamics of the IFES deteriorate with increasing wave period, as resonance arises when the wavelength exceeds twice the separation distance between the platform and the WEC. This phenomenon was further verified through three modified design concepts. These findings provide valuable references for offshore wind-wave hybrid system design.</p>

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Dynamic Analysis of a Wind-Wave Integrated Floating Energy System Supported by Barge-Type Platform

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Jie-yi Ding,
  • Zhao-bin Shi,
  • Jia-qing Yin,
  • Yang Yang,
  • Jie Yu,
  • Ying-yi Liu,
  • Musa Bashir,
  • Chun Li,
  • Shun-hua Chen

摘要

The integrated floating energy system (IFES) comprising floating offshore wind turbines (FOWTs) and wave energy converters (WECs) presents a promising solution for reducing energy costs and enhancing motion stability. This study develops an innovative barge-type IFES integrated with multiple Wavestar prototype WECs to address this research need. A fully coupled framework is proposed for the aero-hydro-servo-elastic dynamic analysis of the wind-wave IFES concept under environmental conditions. The study analyzes time-varying platform motions and power characteristics of the IFES concepts compared to the FOWT. Results indicate that the standard deviations of platform roll and pitch decrease significantly due to the WEC integration under the most examined load cases (LCs). The system achieves a maximum reduction of 71.04% in rolling fluctuation under 16 m/s wind speed, while platform pitch decreases by 49.65%. The IFES demonstrates increased output power across all examined LCs, while tower-base loads decrease by over 20% under a wind velocity of 11 m/s. Additionally, the results indicate that the rotational dynamics of the IFES deteriorate with increasing wave period, as resonance arises when the wavelength exceeds twice the separation distance between the platform and the WEC. This phenomenon was further verified through three modified design concepts. These findings provide valuable references for offshore wind-wave hybrid system design.