Operation stability of axle-box integrated metro vehicles running on small radius curved tracks

HUO Ziwei1, 2, WEN Yongpeng1, 2, 3, ZHONG Shuoqiao1, 2, TU Chunyun1, 2, LOU Bozhen1, 2

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 121-130.

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PDF(3099 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 121-130.

Operation stability of axle-box integrated metro vehicles running on small radius curved tracks

  • HUO Ziwei1,2,WEN Yongpeng1,2,3,ZHONG Shuoqiao1,2,TU Chunyun1,2,LOU Bozhen1,2
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Abstract

The development of railway vehicle technology has imposed higher demands for lightweight bogie. The adoption of axle box-integrated bogie technology to achieve lightweight construction will be one of important means for the future development of rail vehicles in China. To improve the operational stability of subway vehicles equipped with axle box-integrated bogie on curved tracks, considering the characteristics of numerous tight curves and short transition sections in subway lines, an established dynamic model for subway vehicle passage on curved tracks employing built-in axle boxes. By comparing and analyzing the characteristics of subway vehicles during curve negotiation for different axle-box arrangements, the impact of longitudinal stiffness on the running stability of subway vehicles with axle-box integration was explored. Additionally, the necessity of installing yaw dampers to further resolve the contradiction between the curved passing ability and running stability of metro vehicles with axle-box integration on curve tracks was pointed out. The research results demonstrate that, compared to subway vehicles with externally mounted axle-boxes, subway vehicles with axle-box integration possess better ability to navigate curves but exhibit poorer running stability on curved tracks. Installing yaw damper and selecting appropriate longitudinal stiffness can address the instability issues faced by subway vehicles with axle box-integrated bogie during passage on curved tracks. The work provides valuable insights  for the development of axle box-integrated bogie technology and the realization of lightweight metro vehicles.

Key words

metro vehicles / axle box-integrated bogie / small radius curves / operational stability / primary longitudinal stiffness / yaw

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HUO Ziwei1, 2, WEN Yongpeng1, 2, 3, ZHONG Shuoqiao1, 2, TU Chunyun1, 2, LOU Bozhen1, 2. Operation stability of axle-box integrated metro vehicles running on small radius curved tracks[J]. Journal of Vibration and Shock, 2024, 43(18): 121-130

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