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Vibration Analysis of Vehicle-bridge Coupling under the Condition of Railway Track Random Irregularities

Author: YeNingXian
Tutor: LiuXiJun
School: Tianjin University
Course: Bridge and Tunnel Engineering
Keywords: Railway vehicle Vehicle-bridge coupling Rail wagon Bullet train Track irregularities
CLC: U441.3
Type: Master's thesis
Year: 2009
Downloads: 26
Quote: 0
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Abstract


The structure of a bridge will have been vibrated when a train passes through the bridge, while the vibration also effects the train vibration accordingly at the same time. This interaction between the train and the bridge is called vehicle-bridge coupling vibration.In this paper, the railway vehicle model included five varieties: the six spindle locomotive model, the middle swing truck model, the spindle swing truck model, the move carriage model and the slack carriage model. The paper showed vehicle marshalling processes under the situations of arbitrary single-lane traffic or double-lane one. The program has the following six major functions: Firstly, the process of the single-lane freight applies to both central hanging freight of 15 DOF equations and axle box hanging freight of 23 DOF equations; Secondly, the process of the single-lane passenger train applies to all types of passenger train with all DOF equations. The process can also give a good answer about high-speed train; Thirdly, the process of the double-lane freight applies to different freights which can pass randomly; Fourthly, the process of the double-lane train applies to the freight in the front of the passenger train; Fifthly, the process of the double-lane train applies to the freight behind of the passenger train; Sixthly, the process of the double-lane passenger train applies to the passenger train which is all DOF equations and any model; All the six situations is unrestricted to directions. The ultimately function of the programs are to provide foundation for a bigger program of Vehicle-bridge coupling with mass matrix, stiffness matrix, damping matrix and matrix of original force. The paper has the following steps: The first is to simulate a sufficiently long time-domain samples to represent the entire random process. The secondly is to input time-domain samples to train-bridge system. The thirdly is to calculate by integral. Then we can have the time response history of trains.Many valuable conclusions can be drawed through the analyze of dynamic response under the different condition in time domain. They can be used in the design of bridge structure and to simulate the actual locomotory course on suppositional bridge and estimate the security. The advance and limit of speed can be directed by these conclusions when vehicle runs on the bridge. In addition, they can be used to direct the control of vibration, estimate the dynamic capability and reinforce the bridge structure. We can ensure that vehicle runs on the bridge safely by way of combination of the academic analyze and experiment, at the same time, in the aspect of design of vehicle this conclusion can be used as reference and show the significance on the safety, comfort and stabilization theoretically.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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