Aerospace Engineering

Flutter analysis of viscoelastic panels in supersonic flow

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  • Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136

Received date: 2013-09-06

Abstract

In this paper, based on the partial differential governing equation of isotropic flat panel in classic supersonic flow, the viscoelastic structural damping is introduced into the equation by using Kelvin′s model.Dynamic instability behavior of a linear viscoelastic panel in supersonic flow is investigated.The quasi-steady piston theory of supersonic flow is employed under the aerodynamic pressure.The panel governing equation is transformed into a set of ordinary differential equations via the Galerkin approach.First-order state equations are then obtained and solved by means of a standard eigenvalue calculation.The dynamic instability of viscoelstic panels is predicted by the feature of characteristic roots.The phenomena of coupled-mode flutter without structural damping and single-mode flutter with structural damping induced by the supersonic flow are observed for the different dynamic pressure values.Results indicate that structural damping plays an important role in the stability of panels flutter.Sufficient damping can remarkably defer the flutter threshold.

Cite this article

YU Tian-jun, YANG Xiao-dong, ZHAO Wei-tao . Flutter analysis of viscoelastic panels in supersonic flow[J]. Journal of Shenyang Aerospace University, 2013 , 30(5) : 16 -20 . DOI: 10.3969/j.issn.2095-1248.2013.05.004

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