Analysis of Local Vibration Characteristics and Influencing Factors of the High-Speed Railway Box Beam

Abstract

In the study of high-speed railway viaduct, structural noise is becoming a hot issue, the root cause is the local vibration which is generated when the trains pass the bridge, the vibration frequency is between 20-200 Hz. Based on the vehicle-track coupling dynamics, the local vibration of the box girder is analyzed by the Finite Element Method (FEM) in detail. Six representative sensitive points were selected to analyze the vibration response under various conditions. Different section forms are analyzed, including different thickness, dip angle of the web plate, and so were the double room beam. The results show the local vibration can be controlled effectively by the improvement of the cross-sectional form in the practical engineering, in particular changing the thickness of the top plate, and the thickness inclination web plate, at the same time the form must meet other precondition. At last the effects of local vibration on double room box girder beam are discussed. The vibration response of double room box girder is lower than single room box girder.