Fundamental concepts in the analysis of wake-induced oscillation of bundled conductors

Wake-induced oscillations of bundled conductors are caused by shielding of leward conductors of a bundle by windward ones. The conductor motions take the form of traveling vibration waves moving in the bundle. Analysis is carried out in terms of normal wave propagation modes, each mode being a certain combination of wave motions in the conductors of the bundle that propagates independently of the other modes. The transfer matrix method is used to determine whether a set of propagation modes exists, for given wind conditions, that can satisfy boundary conditions at span supports and thus indicate the possibility of stable oscillation.