Numerical Investigation for Galloping of Iced Quad Bundle Conductor in Stochastic Wind Field
YAN Bo1 LIU Xiao-hui1 ZHANG Hong-yan2 ZHOU Song3
1.Department of Engineering Mechanics, Chongqing University, Chongqing 400030,China; 2.Sichuan Electric Power Research Institute, Chengdu 610071,China; 3.Sichuan Electric Power Industry Commission & Test Institute,Chengdu 610016, China
Abstract:Abstract: Galloping of iced quad bundle conductor in stochastic wind field is numerically investigated by means of the finite element method. The variation of wind velocity with the height above the ground and the space correction between any two points are taken into account in the simulation of stochastic wind field. The aerodynamic loads on the iced conductor are determined based on the aerodynamic coefficients varying with angle of attack obtained by wind tunnel test. It is shown from the numerical results that the galloping mode of transmission line with smaller span in stochastic wind field is consistent with that in steady wind, but the galloping mode of transmission line with larger span is different from that in steady wind filed. Therefore, it is necessary to investigate the galloping behavior of iced transmission lines with large span in stochastic wind field for the design of anti-galloping device.