Overhead contact line (OCL) is a critical power supply device in electrified railways. When deployed in strong winds regions, OCL is highly susceptible to galloping under wind loading. Excessive galloping can lead to structural damage of this system. In this study, a finite element model of OCL is developed based on the absolute nodal coordinate formulation, in which spring element is employed to represent the elastic compensation device of the steady arm. A shape-finding method and a dynamic simulation approach incorporating elastic steady arm are proposed. The aerodynamic load distribution of the OCL under high wind-speed conditions is obtained using computational fluid dynamics. The dynamic responses of elastic steady arm and traditional hook-type steady arm under strong wind loads are simulated. The results indicate that the elastic steady arm exhibits superior wind-resistant performance, achieving a maximum reduction of vertical vibration at the steady arm point by up to 30.89%.

Electrified railway,overhead contact line,aerodynamic parameter,wind vibration