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<p>The study establishes a vehicle dynamics model incorporating transmission gears using SIMPACK multibody dynamics software, accounting for track roughness and running resistance. Displacements are applied to the driving gear to simulate parallel and angular shaft misalignment. By comparing dynamic characteristics and performing data fitting of the gear transmission system across varying misalignment magnitudes, the influence of shaft misalignment on high-speed train gear dynamics is quantified. Results indicate that shaft misalignment reduces gear mesh stiffness and amplifies dynamic transmission errors. Furthermore, parallel and angular misalignment induce abrupt radial force fluctuations at the fundamental meshing frequency and its second harmonic, intensifying impact loads on the vehicle system.</p>

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Impact of motor-gear axis misalignment on dynamics of high-speed train gears

  • 期刊论文

  • 发表日期：

    2025年11月8日

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  • Nan Zhong,
  • Hai Xue,
  • Yongfeng He,
  • Yulong Ma

摘要

The study establishes a vehicle dynamics model incorporating transmission gears using SIMPACK multibody dynamics software, accounting for track roughness and running resistance. Displacements are applied to the driving gear to simulate parallel and angular shaft misalignment. By comparing dynamic characteristics and performing data fitting of the gear transmission system across varying misalignment magnitudes, the influence of shaft misalignment on high-speed train gear dynamics is quantified. Results indicate that shaft misalignment reduces gear mesh stiffness and amplifies dynamic transmission errors. Furthermore, parallel and angular misalignment induce abrupt radial force fluctuations at the fundamental meshing frequency and its second harmonic, intensifying impact loads on the vehicle system.