Effects of geometric imperfections on the aeroelastic behavior of functionally graded wings in supersonic flow

被引：16

作者：

Ghadimi, M. ^{[1
]}

Dardel, Morteza ^{[1
]}

Pashaei, M. H. ^{[1
]}

Barzegari, M. M. ^{[1
]}

机构：

[1] Babol Univ Technol, Dept Mech Engn, Babol Sar, Iran

来源：

AEROSPACE SCIENCE AND TECHNOLOGY | 2012年 / 23卷 / 01期

关键词：

Geometric imperfection; Functionally graded material; Aeroelastic; Supersonic flow; NONLINEAR OSCILLATIONS; VIBRATION; SENSITIVITY; FLUTTER; PANELS;

D O I：

10.1016/j.ast.2011.10.007

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

In this study, the thermal flutter characteristics of an imperfect cantilever plate under aerodynamic loads are investigated. The plate is assumed to be rectangular and functionally graded (FG). The plate is modeled based on first-order shear deformation theory (FSDT), and the Von-Karman strain-displacement relations are used to model the geometric nonlinearity. Geometric imperfections are modeled as strain energy, which causes a reduction in the structural stiffness. The quasi-steady first-order piston theory is used to model the aerodynamic pressure due to supersonic flows. The effects of geometric imperfections, the volume fraction distribution, the temperature gradient, aerodynamic pressure and the aspect ratio on cantilever plate flutter characteristics are investigated. (C) 2011 Elsevier Masson SAS. All rights reserved.

引用

页码：492 / 504

页数：13

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