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<p>As the generation power of wind turbine gearbox transmission system (WTGTS) develops toward 10 + MW, its full-size test becomes more difficult. Designing a reduced-scale WTGTS to predict dynamic characteristics of the large-size prototype is a potentially feasible approach. However, the existing down-scaled modeling method of WTGTS lacks attention to transient response similitude and identical structure strength. In this work, a down-scaled modeling method of WTGTS is proposed considering dynamic response similitude and identical structure strength. A variable-speed dynamic model of a 5&#xa0;MW WTGTS is established by the centralized method and Lagrange’s equation, which ignored the common defects inherent in real-world devices and electromechanical coupling, and then dynamics similitude laws of WTGTS are deduced based on the dimensional analysis. On this basis, a multi-objective optimization equation is established to calculate the optimal solution of the scaling factor considering multi-constraints of dynamics similitude laws and identical gear contact and bending strength. Finally, the reduced-scale effectiveness is evaluated from the perspectives of structural strength, natural characteristics, and dynamic response. The calculated results indicate that the proposed down-scaled modeling method can not only make gear structure strength of reduced-scale WTGTS consistent with that of the prototype but also well predict natural frequency, modal shape, and steady and transient dynamic responses.</p>

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Down-scaled modeling of wind turbine gearbox transmission system considering dynamic response similitude and identical structure strength

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Wenjun Fei,
  • Jianjun Tan,
  • Hao Li,
  • Honghan Du,
  • Caichao Zhu,
  • Zhangdong Sun

摘要

As the generation power of wind turbine gearbox transmission system (WTGTS) develops toward 10 + MW, its full-size test becomes more difficult. Designing a reduced-scale WTGTS to predict dynamic characteristics of the large-size prototype is a potentially feasible approach. However, the existing down-scaled modeling method of WTGTS lacks attention to transient response similitude and identical structure strength. In this work, a down-scaled modeling method of WTGTS is proposed considering dynamic response similitude and identical structure strength. A variable-speed dynamic model of a 5 MW WTGTS is established by the centralized method and Lagrange’s equation, which ignored the common defects inherent in real-world devices and electromechanical coupling, and then dynamics similitude laws of WTGTS are deduced based on the dimensional analysis. On this basis, a multi-objective optimization equation is established to calculate the optimal solution of the scaling factor considering multi-constraints of dynamics similitude laws and identical gear contact and bending strength. Finally, the reduced-scale effectiveness is evaluated from the perspectives of structural strength, natural characteristics, and dynamic response. The calculated results indicate that the proposed down-scaled modeling method can not only make gear structure strength of reduced-scale WTGTS consistent with that of the prototype but also well predict natural frequency, modal shape, and steady and transient dynamic responses.