RELIABILITY-BASED METHOD FOR DETERMINING LATERAL DRIFT ANGLE LIMIT OF HYBRID TOWER WIND TURBINES

Xu Jun; Wang Dan; Yu Quanfu; Zhang Futai; He Guangling; Wu Qiang

doi:10.19912/j.0254-0096.tynxb.2025-0278

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (7) : 39-47. DOI: 10.19912/j.0254-0096.tynxb.2025-0278

RELIABILITY-BASED METHOD FOR DETERMINING LATERAL DRIFT ANGLE LIMIT OF HYBRID TOWER WIND TURBINES

Xu Jun¹, Wang Dan¹, Yu Quanfu¹, Zhang Futai¹, He Guangling², Wu Qiang²

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Abstract

This study presents a reliability analysis method for determining the lateral drift angle limit of hybrid tower wind turbines. The uncertainties inherent in the design of hybrid tower wind turbines are thoroughly considered, and Sobol sampling is employed to generate samples of random variables. An integrated coupled nonlinear dynamic model of the hybrid tower wind turbine system is developed to conduct nonlinear dynamic response analyses, enabling the extraction of key physical quantities such as tower stress and lateral drift. The harmonic transform method is then utilized to reconstruct the probability distributions of stress extremes in the tower and lateral drift extremes at the tower top. Based on these results, a structural reliability analysis is performed with stress as the performance indicator, and the lateral drift limit is determined using an inverse reliability analysis approach. The lateral drift angle limit is further calculated by incorporating the total height of the tower structure. Numerical analysis results demonstrate that the lateral drift contribution from the concrete section is smaller than that from the steel section. For hybrid towers with varying height ratios between the concrete and steel sections, it is recommended to calculate the lateral drift limits for each section separately and combine them to determine the overall lateral drift limit, which is then normalized by the total tower height to derive the final lateral drift angle limit.

Key words

reliability / wind turbines / finite element method / concrete-steel hybrid tower / drift angle limit / co-simulation

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Xu Jun, Wang Dan, Yu Quanfu, Zhang Futai, He Guangling, Wu Qiang. RELIABILITY-BASED METHOD FOR DETERMINING LATERAL DRIFT ANGLE LIMIT OF HYBRID TOWER WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2026, 47(7): 39-47 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0278

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