简支铁路桥梁加固前后共振响应分析

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Abstract Research purposes ： According to the change of natural frequency of the simply - supported railway bridge before and after strengthening， the resonance speed of train is changed. So it is necessary to analyze the resonance response whether meet the requirements when the bridge is strengthened. In this paper，the resonance mechanism about vehicle - bridge system is introduced， the influence factors of resonance response about vehicle - bridge system are studied，and the dynamic interaction between train and bridge before and after strengthening is analyzed through ANSYS and multi - body dynamics software UM.
Research conclusions ： (1 ) Results of the vehicle - bridge simulation calculation indicate that the resonance speed is changed before and after strengthening of the straight small span bridge. (2) The resonance speed outstrips the normal speed range of high speed train after strengthening of bridge. (3) The vertical amplitude and acceleration of bridge when the train on second resonance speed is much lower than that of the first resonance speed，so it can be ignored. (4) The amplitude and acceleration can be reduced obviously when vertical and transverse bridge resonance occurs according to the strengthening of bridge. (5) The research methods and results can provide references for the resonance control of the simply - supported railway bridges.

Key words： railway bridge resonance control vehicle - bridge interaction strengthen speed of train.

Received: 09 June 2015

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	Articles by authors
	ZHOU Chang - dong1
	LIU Bin2

Cite this article:

ZHOU Chang - dong1,LIU Bin2. Research on the Resonance Response of Simply - supported Railway Bridge Before and After Reinforcement[J]. Journal of Railway Engineering Society, 2015, 32(9): 60-66.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2015/V32/I9/60

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