General formulation of linear aeroelastic system stability and respective post-critical response types

0361435 - ÚTAM 2012 RIV NL eng C - Conference Paper (international conference)
Pospíšil, Stanislav - Náprstek, Jiří
General formulation of linear aeroelastic system stability and respective post-critical response types.
Proceedings of 13th International Conference on Wind Engineering. Amsterdam: Multi-Science Publishing Co Ltd, 2011 - (Geurts, C.), s. 1-8. ISBN 978-1-907132-33-9.
[International conference of wind engineering /13./. Amsterdam (NL), 10.07.2011-15.07.2011]
R&D Projects: GA ČR(CZ) GA103/09/0094; GA AV ČR(CZ) IAA200710902
Institutional research plan: CEZ:AV0Z20710524
Keywords : nonlinear aeroelasticity * post-critical response * mathematical stability
Subject RIV: JM - Building Engineering

In the article, the unified mathematical description of stability conditions for bluff body limited to the linear variant of a general mathematical model is presented. The linearised double degrees-of-freedom (DDOF) model is used and the properties of the response located on a stability boundary and the tendencies of the response in its neighbourhood are analysed by means of Routh theorem. Among others, the Routh conditions particularly important for the flutter and divergence onset are identified as a special cases of general theory and depicted in the frequency plane delimited by the squared frequencies of two principal aero-elastic modes.
Permanent Link: http://hdl.handle.net/11104/0198746