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<p>Wind turbine blades encounter various operational faults, particularly as their size increases, resulting in increased load-bearing and heightened safety concerns at the blade roots. This study employed finite element analysis on solid and shell models of a 94 m blade, alongside full-scale structural tests, to comprehensively investigate axial force distribution at wind turbine blade roots. Findings reveal significant discrepancies between actual axial force distribution and theoretical predictions, influenced notably by blade aerodynamics and spar cap structural design. Optimising blade aerodynamics, spar caps, and adjusting bolt pretension are critical for ensuring blade-hub connection safety and overall wind turbine stability. The study offers design guidelines to mitigate faults, enhance performance, and improve the economic viability of wind farms.</p>

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Research on axial force distribution at the root of 94-meter wind turbine blades

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Yuanrong Sun,
  • Peiyu Qi,
  • Yihang Qu,
  • Congli Hu,
  • Jianbo Li

摘要

Wind turbine blades encounter various operational faults, particularly as their size increases, resulting in increased load-bearing and heightened safety concerns at the blade roots. This study employed finite element analysis on solid and shell models of a 94 m blade, alongside full-scale structural tests, to comprehensively investigate axial force distribution at wind turbine blade roots. Findings reveal significant discrepancies between actual axial force distribution and theoretical predictions, influenced notably by blade aerodynamics and spar cap structural design. Optimising blade aerodynamics, spar caps, and adjusting bolt pretension are critical for ensuring blade-hub connection safety and overall wind turbine stability. The study offers design guidelines to mitigate faults, enhance performance, and improve the economic viability of wind farms.