Time simulation of flutter with large stiffness changes | Zendy

Moti Karpel | Zendy; Carol D. Wieseman | Zendy

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Time simulation of flutter with large stiffness changes

Author(s) -

Moti Karpel,

Carol D. Wieseman

Publication year - 1994

Publication title -

journal of aircraft

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.64

H-Index - 94

eISSN - 1533-3868

pISSN - 0021-8669

DOI - 10.2514/3.46500

Subject(s) - aeroelasticity , flutter , aerodynamic force , decoupling (probability) , aerodynamics , vibration , control theory (sociology) , stiffness , modal , generalized coordinates , structural engineering , mathematics , mathematical analysis , mechanics , physics , computer science , engineering , acoustics , chemistry , control (management) , control engineering , artificial intelligence , polymer chemistry

Time simulation of flutter, involving large structural changes, is formulated with a state space model that is based on a relatively small number of constant generalized coordinates. Vibration modes are first calculated for a nominal finite element model with relatively large fictitious masses located at the area of structural changes. A low frequency subset of these modes is then transformed into a set of structural modal coordinates with which the entire simulation is performed. These generalized coordinates and the associated oscillatory aerodynmaic force coefficient matrices are used to construct an efficent time domain , state space model for a basic aeroelastic case

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