Flutter analysis of cascades using a two dimensional linearized Euler solver

Flutter analysis of cascades using a two dimensional Euler solver

10.2514/6.1991-1681 ◽

1991 ◽

Cited By ~ 2

Author(s):

T. REDDY ◽

MILIND BAKHLE ◽

DENNIS HUFF ◽

TIMOTHYW. SWAFFORD

Keyword(s):

Two Dimensional ◽

Flutter Analysis ◽

Euler Solver

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Construction of Compressible Euler Solver Using Building-Cube Method and Application to Flutter Analysis of Aircraft Wing

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES ◽

10.2322/jjsass.62.39 ◽

2014 ◽

Vol 62 (2) ◽

pp. 39-46 ◽

Cited By ~ 2

Author(s):

Yasutaka NISHIMURA ◽

Daisuke SASAKI ◽

Kazuhiro NAKAHASHI

Keyword(s):

Aircraft Wing ◽

Flutter Analysis ◽

Compressible Euler ◽

Euler Solver

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Robust Flutter Analysis of an Airfoil with Flap Freeplay Uncertainty

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.33-37.1247 ◽

2008 ◽

Vol 33-37 ◽

pp. 1247-1252 ◽

Cited By ~ 1

Author(s):

Zhi Chun Yang ◽

Ying Song Gu

Keyword(s):

Control Surface ◽

Two Dimensional ◽

Advanced Technique ◽

Worst Case ◽

Wing Model ◽

Freeplay Nonlinearity ◽

Flutter Analysis ◽

Flutter Boundary ◽

Nominal Parameter ◽

Flutter Margin

Modern robust flutter method is an advanced technique for flutter margin estimation. It always gives the worst-case flutter speed with respect to potential modeling errors. Most literatures are focused on linear parameter uncertainty in mass, stiffness and damping parameters, etc. But the uncertainties of some structural nonlinear parameters, the freeplay in control surface for example, have not been taken into account. A robust flutter analysis approach in μ-framework with uncertain nonlinear operator is proposed in this study. Using describing function method the equivalent stiffness formulation is derived for a two dimensional wing model with freeplay nonlinearity in its flap rotating stiffness. The robust flutter margin is calculated for the two dimensional wing with flap freeplay uncertainty and the results are compared with that obtained with nominal parameter values. It is found that by considering the perturbation of freeplay parameter more conservative flutter boundary can be obtained, and the proposed method in μ-framework can be applied in flutter analysis with other types of concentrated nonlinearities.

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