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<p>This study investigates the gas–solid coupled horizontal vibration response of a high-speed elevator car system under triple excitations (shaft fluid, guideway, and deflector shroud) with varying blockage ratios. A novel triple-excitation-coupled high-speed elevator car system model is established, integrating dynamic mesh methods and Hertzian contact theory to simulate fluid–structure interactions, time-varying guideway excitations, and deflector shroud effects. The model incorporates aerodynamic loads via computational fluid dynamics and couples these with structural dynamics using Lagrange’s principle, enabling analysis of horizontal vibration mechanisms during acceleration, constant speed, and deceleration phases. Experimental validation using a 7&#xa0;m/s elevator test tower confirmed the model’s accuracy, with simulation-measurement errors below 10%. Results reveal that increasing the blockage ratio (0.45–0.55) reduces the car’s horizontal vibration eigenvalues by 11.02–34.53% but amplifies vibration acceleration amplitudes. Notably, at a blockage ratio of 0.45, the deflector shroud exerts the most significant influence on vibration during constant speed operation, with horizontal aerodynamic forces decreasing as the blockage ratio rises. The study highlights the critical role of deflector shroud positioning and blockage ratio optimization in mitigating vibration, providing theoretical insights for active damping control strategies and aerodynamic design improvements. This work advances understanding of multi-physics coupling in high-speed elevators, addressing gaps in parametric analysis of deflector shroud effects under real-world operating conditions.</p>

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Gas–solid coupled vibration analysis of high-speed elevators: effects of blocking ratios and multi-source excitations

  • 期刊论文

  • 发表日期：

    2025年4月21日

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  • Kai Ma,
  • Dongsheng Cong,
  • Chenglong Zhang,
  • Guifa Yang,
  • Yulei Wang

摘要

This study investigates the gas–solid coupled horizontal vibration response of a high-speed elevator car system under triple excitations (shaft fluid, guideway, and deflector shroud) with varying blockage ratios. A novel triple-excitation-coupled high-speed elevator car system model is established, integrating dynamic mesh methods and Hertzian contact theory to simulate fluid–structure interactions, time-varying guideway excitations, and deflector shroud effects. The model incorporates aerodynamic loads via computational fluid dynamics and couples these with structural dynamics using Lagrange’s principle, enabling analysis of horizontal vibration mechanisms during acceleration, constant speed, and deceleration phases. Experimental validation using a 7 m/s elevator test tower confirmed the model’s accuracy, with simulation-measurement errors below 10%. Results reveal that increasing the blockage ratio (0.45–0.55) reduces the car’s horizontal vibration eigenvalues by 11.02–34.53% but amplifies vibration acceleration amplitudes. Notably, at a blockage ratio of 0.45, the deflector shroud exerts the most significant influence on vibration during constant speed operation, with horizontal aerodynamic forces decreasing as the blockage ratio rises. The study highlights the critical role of deflector shroud positioning and blockage ratio optimization in mitigating vibration, providing theoretical insights for active damping control strategies and aerodynamic design improvements. This work advances understanding of multi-physics coupling in high-speed elevators, addressing gaps in parametric analysis of deflector shroud effects under real-world operating conditions.