In order to explore the influencing factors of catenary aerodynamics in high-speed railway tunnels

based on the finite volume method

the aerodynamics models of train-set passing through different tunnels were established

and the three-dimensional outflow field of catenary air were numerically simulated by using fluid dynamics software. The extreme values of wind load under different working conditions were obtained from the simulation results

and the basic wind migration of catenary clues was analyzed and calculated. The results show that the main factors affecting the wind load of the catenary in the tunnel are tunnel clearance area and vehicle speed. When the train-set passes and crosses in the tunnel

the maximum wind offset value of the catenary clues decreases with the increase of the tunnel clearance area

and increases in a nonlinear way with the increase of the speed. In order to ensure safety

the wind deviation of catenary can be reduced by reducing the span length of catenary or increasing the horizontal tension of catenary.