Dynamic interaction of wind-vehicle-bridge system

摘要

In this paper, a novel analysis model of the wind-vehicle-bridge system is developed in time domain. Both wind velocity fluctuations and random rail irregularities which are excitations of the system vibration are simulated by means of numerical simulation. Generally, a train consists of several locomotives and coaches. All locomotives and coaches are modeled into the mass-spring-dashpot systems. The total analytical DOFs (Degrees Of Freedom) are 23 for a 4-axle vehicle. The bridge model can be built by FEM (Finite Element Method). The interaction of between vehicles and bridge can be solved by an iterative process according to the relations between wheel and rail. Vehicles above deck can change the aerodynamic characteristics of the deck. A special device is developed to measure respective aerodynamic parameters of vehicles and deck by section model wind tunnel test. Finally, an example is analyzed by the presented method to show the effect of wind respectively on vehicle and bridge.