Non linear response of a suspended cable under non stationary excitation

The richness of dynamic phenomena in suspended cables is well known. Using an analytical and a finite element model the paper first explores, the relevance of the modal interactions in the in-plane oscillations under harmonic excitation; secondly, the effects on the 3D spatial response and, finally, the effects of the spatial distribution of the load for the multiharmonic excitation case, representing wind turbulence. When reduced order analytical models are used, the spatial distribution of turbulence is projected onto the cable modal base, thus resulting in a reduced wind excitation. The effect of this reduction has been here studied both for 1D and for a full 3D wind velocity field.