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To investigate the impact laws of different factors on the vibrations of mechanical systems under road surface loads and impact loads, a multi-body dynamics model of the mechanical system was established. The road surface was modeled using white noise generation methods, and simulations were conducted under different road surface conditions to obtain the impact laws of various grades of road surfaces on the mechanical system. A vertical stabilizer based on a three-ring control system was developed to analyze the vibration characteristics of the mechanical system in both scenarios—with and without the stabilizer. The simulation results indicated that the amplitude of system vibrations increased with the roughness of the road surface. Without stabilizers, when the road grade changes from D to E and F, the maximum pitch angle of the pitching part increases by 8.22% and 121.59% respectively. Additionally, the vertical stabilizer effectively enhanced the stability of the mechanical system; compared to the mechanical system without the stabilizer, the maximum pitch angle was reduced by 77.77%, and the fluctuation range of the pitch angle decreased by 71.68%.

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Vibration Analysis of Mechanical System Under the Combined Action of Road Load and Impact Load

  • 会议论文

  • 发表日期：

    2026年

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  • Peibo Mao,
  • Jianli Ge

摘要

To investigate the impact laws of different factors on the vibrations of mechanical systems under road surface loads and impact loads, a multi-body dynamics model of the mechanical system was established. The road surface was modeled using white noise generation methods, and simulations were conducted under different road surface conditions to obtain the impact laws of various grades of road surfaces on the mechanical system. A vertical stabilizer based on a three-ring control system was developed to analyze the vibration characteristics of the mechanical system in both scenarios—with and without the stabilizer. The simulation results indicated that the amplitude of system vibrations increased with the roughness of the road surface. Without stabilizers, when the road grade changes from D to E and F, the maximum pitch angle of the pitching part increases by 8.22% and 121.59% respectively. Additionally, the vertical stabilizer effectively enhanced the stability of the mechanical system; compared to the mechanical system without the stabilizer, the maximum pitch angle was reduced by 77.77%, and the fluctuation range of the pitch angle decreased by 71.68%.