Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge

CHEN Xuli; XIANG Huoyue; TIAN Xiangfu; LI Yongle; CAO Wenjie

doi:10.3969/j.issn.0258-2724.20230382

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Journal of Southwest Jiaotong University > 2025 > Accepted Manuscript

CHEN Xuli, XIANG Huoyue, TIAN Xiangfu, LI Yongle, CAO Wenjie. Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230382

Citation:

CHEN Xuli, XIANG Huoyue, TIAN Xiangfu, LI Yongle, CAO Wenjie. Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230382

Citation:

CHEN Xuli, XIANG Huoyue, TIAN Xiangfu, LI Yongle, CAO Wenjie. Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230382

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Influence of Vertical Stiffness of Continuous Girder on Dynamic Responses of High-Speed Electromagnetic Suspension Train and Bridge

doi: 10.3969/j.issn.0258-2724.20230382

1.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China

Received Date: 09 Aug 2023
Rev Recd Date: 26 Jan 2024

Available Online: 15 Jan 2025

Abstract

Abstract

Vertical stiffness is critically significant for the operational safety and ride comfort of high-speed electromagnetic suspension (EMS) trains on bridges, constituting one of the essential design parameters in bridge engineering. By using a three-span continuous girder as the study object, the vertical stiffness was modified by adjusting the cross-sectional moment of inertia. A coupled vibration analysis of the EMS train-bridge system was conducted under varying train speeds, rated suspension clearances, and temperatures. The variation rules of the dynamic coefficient of the bridge, acceleration of the train, and suspension clearance change with the adjustment coefficient of vertical stiffness of the bridge were discussed. The results show that when the adjustment coefficient of stiffness decreases to about 0.75, the dynamic coefficient of the bridge increases rapidly, and the vertical acceleration of the train is more sensitive to the vertical stiffness variation of the bridge than the suspension clearance change. When the cooling deformation is considered, higher train speed indicates greater vertical dynamic response of the bridge, and the track irregularity and rated suspension clearance have no obvious influence on the dynamic coefficient of the bridge. Higher train speed indicates smaller rated suspension clearance. When the effects of track irregularity and cooling deformation are considered, the adjustment coefficient of vertical stiffness of the bridge corresponding to the same vehicle dynamic response is larger.
- vertical stiffness,
- normal high-speed EMS maglev train,
- continuous girder,
- train-bridge coupling,
- dynamic response

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References(28)

References

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