Analysis Of Vehicle-Curved Steel Truss Bridge Coupling Vibration

The railway has high requirements to lines. The strong adaptability of curved bridge makes it play a vital role in railway bridge. In view of the commonly used truss bridge in our country railway, the present thesis is the result of the efforts devoted to analysis the vehicle-curved steel truss bridge coupling vibration. Some work is done as bellow:1. Deriving the dynamic equilibrium equation of a 23-DOF vehicle on curved track. Producing computer program module of vehicle on curved track in VBC.2. Analysising bridge dynamic response by ANSYS. The result shows that: when vehicle crossing bridge in the conditions of exceed/under super elevation degree, the lateral dynamic response of bridge is similar to the vertical.3. Analysising vehicle dynamic response. The result shows that: when vehicle crossing curved track, the mechanics analysis of outer wheel is much different to the inner wheel. Because the lateral force caused by wheel-rail interaction is complex, it's difficult to get the exact analytic solution of every wheel; but the vertical force caused by wheel-rail interaction is clear, it's easy to get the exact analytic solution of every wheel.4. Analysising the vehicle-64m curved steel truss bridge coupling vibration by VBC. The result shows that: because of steel truss bridge's small torsional rigidity, bending-torsion coupling vibration of steel truss bridge exerts great influence on dynamic analysis.5. Comparing displacement impact coefficient with displacement impact coefficient. To count this issue that the impact coefficient of SDOF structure being inequality, analysising the factor and law which influent the comparative result of the two impact coefficients. Suggesting that external load's action point, frequency and velocity can influence the comparative result.In the finality, the problems requiring further studies are discussed.