ABSTRACT

The large flexibility and long span of the railway catenary system cause the high sensitivity of the structure to wind load, especially the time-varying stochastic wind, which is able to cause the severe forced vibration of the catenary and affect the sliding contact quality with a pantograph. Considering the spatial property of the stochastic wind, the fluctuating wind velocities in three directions are generated through the corresponding empirical spectrums. Based on the wind-induced vibration theory, the wind loads acting on catenary wires are derived. Through CFD and Wind Tunnel Experiment, the aerodynamic coefficients are measured. Based on a nonlinear finite element model of catenary and a multi-body model of pantograph, the effect of wind load on pantograph-catenary interaction is studied. With different geometrical parameters (such as tension and span length), the dynamic responses of pantograph-catenary interaction are analysed, which is beneficial to the anti-wind design of railway catenary systems.