The response of a flexible cable under the combined effects of transverse fluid loading (vortex shedding) and parametric excitation (time varying tension) is considered. The theoretical transient responses are obtained from the solution of sets of uncoupled Mathieu equations. Experimental results are presented for steady-state cases. The cable responses are characterized by a complex coupling between the two modes of excitation. It is hypothesized that this coupling can be best understood by obtaining experimental measures of a new constant K˜, related to the amplitude of vortex shedding loads.

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