A novel state-space formulation is presented for the dynamic analysis of rotating double-beam systems, consisting of two elastic beams continuously joined by viscoelastic springs. Although very simple, the proposed model lends itself to be used in studying the transverse vibration of wind turbine blades provided with a viscoelastic core. An efficient numerical scheme of solution is proposed, which can be further extended to include the effects of shear strain within the core, along with geometrical and material nonlinearities.
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