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Investigation on structural health monitoring and safety evaluation of an 8 MW offshore wind turbine structure supported by the multi-bucket jacket foundation

Author

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  • Xing, Yongpeng
  • Lian, Jijian
  • Dong, Xiaofeng
  • Deng, Mingjiang

Abstract

The structural health monitoring (SHM) and safety evaluation of support structures for offshore wind turbine (OWT) have become critical for ensuring structures operational reliability and mitigating catastrophic failures. In this research, a comprehensive health monitoring framework was presented for an 8 MW OWT structure supported by the multi-bucket jacket foundation and a systematic safety evaluation methodology was also introduced. The proposed approach integrates the generalized Pareto distribution (GPD), entropy weight method (EWM), analytic hierarchy process (AHP) method to assess the structural safety of OWT structure. Initially, the relationship between the vibration response characteristics and operational parameters of the OWT was analyzed based on long-term monitoring data. Subsequently, a multi-level evaluation index system was established for OWT structure supported by multi-bucket jacket foundations. The threshold values of each evaluation index were determined using the GPD, while the corresponding weights were computed via the EWM. The overall safety evaluation score of the OWT structure was then derived through a weighted linear summation of the affiliations and weights of individual evaluation indices. The effectiveness of the proposed method was validated through case studies, demonstrating its capability to evaluate the operational safety of OWT structure. Furthermore, the variation patterns of safety evaluation results under different operational conditions were investigated. It is indicated that the transitional operational conditions present heightened risks, necessitating increased attention in OWT operation and maintenance strategies. This research provides a systematic and quantitative approach for assessing the structural safety of OWT systems, offering valuable theoretical insights and practical guidance for the operation, maintenance, and accident prevention of OWT structure.

Suggested Citation

  • Xing, Yongpeng & Lian, Jijian & Dong, Xiaofeng & Deng, Mingjiang, 2026. "Investigation on structural health monitoring and safety evaluation of an 8 MW offshore wind turbine structure supported by the multi-bucket jacket foundation," Renewable Energy, Elsevier, vol. 256(PB).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pb:s0960148125015460
    DOI: 10.1016/j.renene.2025.123882
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    References listed on IDEAS

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