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The Analysis of Spatial Vibration Response and Stability for Vehicle-bridge Coupling Time-varying Sy

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Tutor: LiDongPing
School: Central South University
Course: Mechanics
Keywords: finite element method,vehicle-bridge system,quintic shapefunction,space moving c
CLC: U441.3
Type: Master's thesis
Year:  2013
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Abstract:
As the raising speed of the train, the link between the bridge and the train become closer. Nowadays, there is a growing research about the vehicle-bridge coupling all over the world. Based on formula of vehicle-bridge coupling time-varying system, this paper gives a basic research about spatial vibration response and stability. The main work and achievements are as follows:(1) This model, which can be applied in the conjunction of the vehicle-bridge, adopting the formula of vehicle-bridge coupling time-varying system with the finite element concept, is simple and convenient for the program calculation. Concerning the shortage and the insufficient of the traditional shape function, applying in the analysis of the vehicle-bridge coupling time-varying system, not only to screen the suitable variance and the(2) shape function, as well as the quantic shape function can solve the discontinuous stiffness problem in the space vehicle-bridge system, but also it can induce the mass matrix, damping matrix, and the stiffness matrix with the quantic shape function.(3) By analyzing the result based on the space vehicle vibration model, the instability critical velocity, concerning the horizontal and vertical coupling vibration is lower than what is only considering the horizontal vibration.(4) The established model in this paper, using the matlab as a platform can be applied in designing the programs of vehicle-bridge coupling time-varying system. And the correctness of the model can be also verified with the real vehicle-bridge coupling time-varying system case.
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