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| Analysis of the Influence of Section Form on Local Vibration Characteristics of High - speed Railway Box Girder |
| LUO Wen -jun，ZHANG Xin – yuan |
| (Engineering Research Center of Railway Environment Vibration and Noise Ministry of Education，East China Jiaotong University, Nanchang，Jiangxi 330013, China) |
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Abstract Research purposes ： The root cause of the structural noise of high - speed railway viaduct is the local vibration which is generated when the train passing through the bridge and the vibration frequency is between 20 ~ 200 Hz. We can know from some research it is poor to control the structural noise through the route of transmission. A more sophisticated method should be used to study the origin of the method.
Research conclusions: Based on the vehicle - track coupling dynamics，the local vibration of the high - speed railway box girder is analyzed by the Finite Element Method ( FEM) in detailed. Six representative sensitive points were selected，and the point vibration response under various conditions was analyzed. The results show ： (1) The local vibration can be controlled effectively by changing the thickness of the top plate in the practical engineering, at the same time the form must meet other preconditions. (2) By the analysis of changing the angle of the web，the smaller inclination of the structure has a certain control effect on the local vibration. But it does not mean that it must be set to 0 degrees for controlling the local vibration. Other factors must be taken into consideration to set the most appropriate web inclination. The study results have some guiding significances for the design of vibration and noise reduction of high speed railway bridge engineering.
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Received: 13 July 2015
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2015, Vol. 32 
