Mechanical Characteristics of High-Speed Railway Catenary Cantilever System

In order to solve problems of parts’ fatigue cracks and falling off in the cantilever system for high-speed railway catenary, a study was conducted to investigate mechanical characteristics of the cantilever system. First, a finite element model of the cantilever system was established, whereby the static mechanical properties of the cantilever system were studied under different conditions of static wind load and icing load. Then, the modal analysis was performed to analyze the natural frequencies and mode shapes of the cantilever system. Based on the deformation equation, the transfer function of the load acting on the cantilever was derived, and the distribution rule of the force acting on cantilever brackets was obtained. Finally, the validity of the finite element model of the cantilever system was verified by a bench test. The result shows that the maximum displacement of the cantilever system occurs to the locating clamp. When the static wind load is applied, the maximum stress point of the cantilever system is at the joint-bolt of the inclined cantilever and the binaural casing. When the icing load is applied, however, the maximum stress point of the cantilever system is at the locating clamp.