Nonlinear Vibration Analysis of a Sandwich Beam and Assessment of the Dynamic Behavior

Resumo

© Springer Nature Switzerland AG 2020.The aim of the current work is to discuss the dynamic buckling of a sandwich plate, to identify the response signals, and to find the relevant frequencies and amplitudes. The analyses consider the thin face-sheets of the sandwich plate which are subject to in-plane compressive load lower than the estimated critical value for the local buckling, but the plate is also subject to vibration in specific frequency causing variation of the load amplitude. The dynamic variation of the inplane stress stiffening changes the natural frequencies representing the out-of-plane modes dynamically. The nonlinear variation of the response for the out-of-plane displacements is analyzed with the continuous wavelet transform (CWT) method for characterizing this behavior.

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