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| Coupling Vibration Study of Medium-low Speed Maglev Train- Long Span Continuous Bridge System |
| LIU De-jun1,LI Xiao-zhen1, HONG Qin-ye2, WANG Dang-xiong1,JIN Xin1 |
| (1. Southwest Jiaotong University, Chengdu, Sichuan 610031, China; 2. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430063, China) |
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Abstract Abstract：Research purposes： In this paper, the coupling dynamics model of medium-low speed maglev vehicle- suspension controller-bridge system is established for the largest span medium-low speed maglev bridge in the world. Considering the influence of track irregularity, the dynamic performance of the medium-low speed maglev vehicle-bridge system with 110 m main span continuous girder is evaluated by the vertical dynamic response of vehicles and bridges at different speeds and different vehicle loads (AW0, AW2 and AW3). Research conclusions： (1) The maximum vertical acceleration of the vehicle body is 0.447 m/s2, the maximum value of the Sperling comfort index is 1.664, and the vertical ride comfort is "excellent". (2) The maximum fluctuation value of the suspension gap is 2.26 mm, except for the speed of 100 km/h, the fluctuation of the remaining working conditions is within 2 mm, which shows the suspension system has sufficient suspension stability. (3) The maximum mid-span vertical acceleration of the beam is 0.065 m/s2, far less than the limit of 0.5g. (4) The research results can provide a reference for the design and application of long-span medium-low speed maglev bridge.
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Received: 21 April 2017
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2017, Vol. 34 
