Vehicle And Structure Interaction Analysis And Simulation By ANSYS

Impact on bridges are caused during transportation while the vibrated structure also has a reaction on vehicles which is called vehicle-structure coupled vibration or bridge dynamic interaction.The practical demand of the design of modern high-speed and heavy haul railway bridge and the critical improvement of the analysis for the running of high-speed train's stability and comfort require much deeper research for vehicle-structure coupled vibration and properly evaluation of vehicles and structures dynamic performance.Based on the classical bridge dynamic interaction theory,the moving force,the moving mass and the moving spring-mass model's balanced equation was expressed while the APDL program to solve those equations under Newmark theory are coded.Three FEA modes were also established and resulted which makes a country with the analysis results.Variable was the speed leading to different maximum displacement and acceleration of the bridge which makes a possible to discuss it's applicability.The result leaded that moving force has better consistencies with moving spring-mass.Using MATLAB program simulated track irregularity on the track irregularity power spectrum in the time-frequency domain.The equations between Cosine-shaped or Irregular shaped simply supported beam and moving mass or moving spring-mass were analyzed and expressed meanwhile the APDL program under ANSYS environment to solve those equations on Newmark theory are programed which makes a contrary with the FEA results.The little differences of the results makes FEA method possible.The double T-type girder,railway and 25 t axle load trains models were established.Different characters of the bridge displace responds on different stiffness of structure part were learned.Based on this,finite element model updating on static-load response surface was able to be made through.Results have been checked successfully,which made the FEA model be a benchmark model for bridge dynamic interaction.Transient analysis to quantify the bridge and vehicles vibration by coupled nodes made a contrary with the practical monitoring data.The result is that ANSYS FEA models is able to simulate the vehicle-structure coupled vibration which provide a method and basis for the study.