Finite element and experimental vibration analysis of viscoelastic composite structures

摘要

Finite element and experimental vibration analyses of viscoelastic composite structures are performed. The present implementation gives the possibility to preserve the frequency dependence for the storage and loss moduli of viscoelastic materials and to use the same hypothesis - complex modulus model in the free vibration, frequency and transient response analyses. Dynamic characteristics of viscoelastic composite structures are evaluated by the energy method, the method of complex eigenvalues, from the resonant peaks of the frequency response function and using the steady state vibrations. To verify numerical results, the dynamic characteristics of different sandwich and laminated composite panels have been determined by the pulse and non-contact laser techniques.