Moving System And Structure Interaction Analysis And Simulation By ANSYS

Vibrations caused by trains through the bridge, commonly referred to as vehicle-bridge coupled vibration, also called bridge dynamic interaction. As China continues to speed railway passenger train, cargo train load growing wider, comprehensive high-speed railway construction, trains and tracks and bridges interactions significantly intensified. Therefore, the vehicle-bridge dynamic interaction in-depth analysis in order to properly assess the dynamic performance of bridges and trains, is the actual needs of the modern high-speed and heavy haul railway bridge design, as well as for the study of the stability and comfort the train running at high speed is also provided important assistance.Firstly, based on vibration theory and the hypothesis of Euler-Bernoulli beam, the balance equation expressed in matrix of the simply supported beams is derived under the effect of the moving force, moving mass and moving spring-mass model.Based on Newmark method by using APDL programming in ANSYS environment to solve variable coefficient differential equation. To study the dynamic response of simply supported beam by using the model of moving force moving mass and spring-mass system. Using the displacement contact method to solve three kinds of finite element model of vehicle-bridge coupling and comparing the numerical solution and the analytical Solutions.Secondly, To analysis the influence of moving velocity moving mass derivative simplified to the dynamic response of simply supported beam. To study the effect of the velocity on the maximum deflection and acceleration of the moving spring-mass model.Then, using APDL programming to simulate track irregularity on the basis of representation of the track irregularity power spectrum in the time-frequency domain. In order to ensure the correctness of the time-domain irregularity curve through solving the power spectral density function by the time-domain irregularity curve. The balance equation expressed in matrix of the simply supported beams by gravity and the beam shape is a sine wave is derived under the effect of the moving mass and moving spring-mass model. Based on Newmark method by using APDL programming in ANSYS environment to solve variable coefficient differential equation. Using the displacement contact method to solve the finite element model established by gravity and when the beam shape is a sine wave and comparing the numerical Solution and the analytical Solutions. The simulated irregularity introducing mass-spring model to analyze the impact on the dynamic response of vehicle-bridge.Finally, using ANSYS to establish T-type box girder and the 24 t axle load high-speed trains finite element model. Solving the train running on the track by displacement contact method. To analysis the vibration characteristics of the train on the track by transient analysis.The results show that the dynamic analysis of vehicle-bridge coupling can be well simulated by ANSYS and provide convenient conditions for vehicle-bridge research. eliminate the trouble for propagating special program to solve differential equations with variable coefficients. provide a method and basis for the analysis of vehicle-bridge coupling.