Flutter of Constrained Layer Damping Cylindrical Shell with Fractional Derivative Viscoelastic Core

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Mokhtari, Mohadesh | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49704 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Hadadpour, Hassan; Dehghani Firouzabadi, Rohollah
Abstract:
This study presents the aeroelastic stability and vibration analysis of a sandwich circular cylindrical shells with a constrained viscoelastic layer. Based on the Donnell-Moshtari theory, the structural formulation of the cylinder is obtained using Lagrange method. The Rayleigh-Ritz method is implemented to solve the discretized governing equations. To describe the mechanical properties of the viscoelastic layer, the fractional order standard solid model is applied. The effects of variation of the governing parameters such as the length to radius ratio, radius to total thickness ratio and ratio of core to facing thickness on the stability margins and frequencies of sandwich cylindrical shells are investigated and some conclusions are outlined
Keywords:
Constrained Layer Damping (CLD) ; Flutter ; Cylindrical Sandwich Shell ; Cylindrical Shells ; Panel Flutter ; Fractional Viscoelastic Material

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