A Response Spectrum Analysis of Wind Deflection in Railway Overhead Contact Lines Using Pseudo-Excitation Method

The wind deflection of overhead contact lines (OCLs) challenges the stable and safe operation electrified railways. steady causes static line, while fluctuating leads to OCL buffeting. This paper performs a response spectrum analysis caused by combined effects winds. Considering initial configuration OCL, an absolute nodal coordinate formulation method is employed model OCL. A spatial field including in three directions constructed aerodynamic forces on are derived. nonlinear solution procedure proposed include geometrical nonlinearity dropper slackness evaluation deflection. pseudo-excitation utilised evaluate buffeting with stochastic load. results indicate that has significant effect vertical Under extreme speed 40 m/s, line always within working range pantograph head when only load considered. However, non-negligible fluctuation may be outside under same speed. Sensitivity analyses some key parameters suggest increases damping ratio tension class effective measures improve wind-resistance capability