Original title: Relation of flutter derivatives and indicial functions in linear aero-elastic models
Authors: Náprstek, Jiří ; Pospíšil, Stanislav
Document type: Papers
Conference/Event: Dynamics of Machines 2012, Prague (CZ), 2012-02-07 / 2012-02-08
Year: 2012
Language: eng
Abstract: Double degree of freedom (DDOF) linear systems are frequently used to model the aero-elastic response of slender prismatic systems until the first critical state is reached. Relevant mathematical models appearing in literature differ in principle by way of composition of aero-elastic forces. This criterion enables to sort them roughly in three groups: (i) neutral models - aero-elastic forces are introduced as suitable constants independent from excitation frequency and time; (ii) flutter derivatives - they respect the frequency dependence of aero-elastic forces; (iii) indicial functions - they are defined as kernels of convolution integrals formulating aero-elastic forces as functions of time. The paper tries to put all three groups together on one common basis to demonstrate their linkage and to eliminate gaps in mathematical formulations between them.
Keywords: dynamic stability; flutter derivatives; indicial functions; non-symmetric linear systems
Project no.: CEZ:AV0Z20710524 (CEP), IAA200710902 (CEP), GA103/09/0094 (CEP)
Funding provider: GA AV ČR, GA ČR
Host item entry: Dynamics of Machines 2012, ISBN 978-80-87012-39-0

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0206756

Permalink: http://www.nusl.cz/ntk/nusl-85974


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
Conference materials > Papers