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<p>The demand for quieter, more efficient wind turbines underscores the role of gearboxes in structure-borne noise and vibration. Predicting gear-induced noise is challenging due to complex loading conditions, and traditional methods relying on receiver-specific metrics lead to inconsistencies across nacelle configurations. The blocked force approach addresses this by isolating gearbox source characteristics, enabling a&#xa0;consistent noise source characterization independent of test rig dynamics.</p><p>This study introduces a&#xa0;methodology for blocked force measurements on a&#xa0;wind turbine gearbox test rig, supported by a&#xa0;flexible multibody model of the test rig. The model aids in selecting measurement positions and enables interface characterization using Virtual Point Transformation (VPT). Simulations reveal that incorporating torsional excitations on the main shaft is essential for accurate interface characterization, while accounting for double interfaces on the torque arm significantly enhances the precision of the characterization. Simulation-based blocked forces are validated by comparing simulated operational responses on the test rig with predictions and applying the methodology to a&#xa0;modified test rig structure. Consistent results confirm the independence of blocked forces from the receiving structure.</p><p>This validation establishes the reliability of blocked forces for use in wind turbine environments, providing a&#xa0;robust foundation for Noise, Vibration, and Harshness (NVH) prediction and mitigation.</p>

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Numerical validation of a blocked force measurement approach to determine wind turbine gearbox excitation

  • 期刊论文

  • 发表日期：

    2025年9月4日

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  • Bart De Smet,
  • Philip Becht,
  • Sebastian Schmidt,
  • Bart Blockmans,
  • Frank Naets

摘要

The demand for quieter, more efficient wind turbines underscores the role of gearboxes in structure-borne noise and vibration. Predicting gear-induced noise is challenging due to complex loading conditions, and traditional methods relying on receiver-specific metrics lead to inconsistencies across nacelle configurations. The blocked force approach addresses this by isolating gearbox source characteristics, enabling a consistent noise source characterization independent of test rig dynamics.

This study introduces a methodology for blocked force measurements on a wind turbine gearbox test rig, supported by a flexible multibody model of the test rig. The model aids in selecting measurement positions and enables interface characterization using Virtual Point Transformation (VPT). Simulations reveal that incorporating torsional excitations on the main shaft is essential for accurate interface characterization, while accounting for double interfaces on the torque arm significantly enhances the precision of the characterization. Simulation-based blocked forces are validated by comparing simulated operational responses on the test rig with predictions and applying the methodology to a modified test rig structure. Consistent results confirm the independence of blocked forces from the receiving structure.

This validation establishes the reliability of blocked forces for use in wind turbine environments, providing a robust foundation for Noise, Vibration, and Harshness (NVH) prediction and mitigation.