Flutter analysis of composite panels in supersonic flow

1990 ◽  
Author(s):  
MAENG-HYO CHO ◽  
IN LEE
Keyword(s):  
Supersonic Flow ◽  
Composite Panels ◽  
Flutter Analysis

Nonlinear flutter analysis of composite panels

2018 ◽  
Vol 32 (12n13) ◽  
pp. 1840043
Author(s):  
Xiaomin An ◽  
Yan Wang
Keyword(s):  
Dynamic Pressure ◽  
Composite Panel ◽  
Composite Panels ◽  
Nonlinear Finite Element Method ◽  
Nonlinear Flutter ◽  
Unsteady Aerodynamic ◽  
Flutter Analysis ◽  
Time Marching ◽  
Coupled Solution ◽  
Nonlinear Panel Flutter

Nonlinear panel flutter is an interesting subject of fluid–structure interaction. In this paper, nonlinear flutter characteristics of curved composite panels are studied in very low supersonic flow. The composite panel with geometric nonlinearity is modeled by a nonlinear finite element method; and the responses are computed by the nonlinear Newmark algorithm. An unsteady aerodynamic solver, which contains a flux splitting scheme and dual time marching technology, is employed in calculating the unsteady pressure of the motion of the panel. Based on a half-step staggered coupled solution, the aeroelastic responses of two composite panels with different radius of R = 5 and R = 2.5 are computed and compared with each other at different dynamic pressure for Ma = 1.05. The nonlinear flutter characteristics comprising limited cycle oscillations and chaos are analyzed and discussed.

Aeroelastic Flutter Analysis of Thick Porous Plates in Supersonic Flow

2019 ◽  
Vol 11 (10) ◽  
pp. 1950096 ◽  
Author(s):  
Reza Bahaadini ◽  
Ali Reza Saidi ◽  
Kazem Majidi-Mozafari
Keyword(s):  
Supersonic Flow ◽  
Plate Theory ◽  
Equations Of Motion ◽  
Functionally Graded ◽  
Governing Equations ◽  
Aerodynamic Pressure ◽  
Aeroelastic Flutter ◽  
Piezoelectric Layers ◽  
Flutter Analysis ◽  
Porosity Coefficient

The aeroelastic flutter analysis of thick porous plates surrounded with piezoelectric layers in supersonic flow is studied. In order to aeroelastic analysis of the thick porous-cellular plate, Reddy’s third-order shear deformation plate theory and first-order piston theory are used. Furthermore, the plate is composed of two face piezoelectric layers and three functionally graded porous distributions core. Applying the extended Hamilton’s principle and Maxwell’s equation, the governing equations of motion are obtained. The partial differential governing equations are transformed into a set of ordinary differential equations by applying Galerkin’s approach. The effects of porosity coefficient, porosity distributions, piezoelectric layers, geometric dimensions, electrical and mechanical boundary conditions on the flutter aerodynamic pressure and natural frequencies of porous-cellular plates are investigated.

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