Influence of environmental and structural factors on transmission line galloping
1.School of Civil Engineering, Ludong University, Yantai, Shandong 264025, China| 2.School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Abstract： To ascertain the influence of environmental and structural factors on the transmission line galloping, the transmission line dancing fluidsolid coupling problem was simplified to transient dynamics problem in aerodynamic effect. The suspension cable theory was used to determine the initial state of transmission line. The transmission line aerodynamic forces were confirmed by Den. Hartog′s vertical galloping mechanism and O. Nigol′s torsional galloping mechanism. The finite element model(FEM) of transmission line dancing with two degrees of freedom was established based on APDL languages of ANSYS FEM, and the existing data were verified by the proposed model. The influences of wind speed, air density, damping ratio and initial tension on power transmission line galloping were analyzed by the proposed model. The results show that the galloping amplitude is increased with the increasing of wind speed and air density, and galloping amplitude is decreased with the increasing of damping ratio and initial tension.
2015, Vol. 36 
