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Uncertainty quantification and bifurcation behavior of an aeroelastic system
Published in
2010
Volume: 3
   
Issue: PARTS A AND B
Pages: 1177 - 1187
Abstract
Aeroelastic stability remains an important concern for the design of modern structures such as wind turbine rotors, more so with the use of increasingly flexible blades and military aircrafts with increasing maneuvering capabilities etc. A nonlinear aeroelastic system has been considered in the present study with parametric uncertainties. The analysis has been put in a stochastic framework and the propagation of system uncertainties have been quantified in the aeroelastic response. A spectral uncer- tainty quantification tool called Polynomial Chaos Expansion has been used. A projection based non-intrusive Polynomial Chaos approach is compared to its classical Galerkin based counterpart, and proven to be more efficient as order of chaos expansion increases. Effect of system randomness on the bifurcation behavior and the flutter boundary has been significant. Stochastic bifurcation results and bifurcation of probability density functions are presented here. Copyright © 2010 by ASME.
About the journal
JournalAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
ISSN08888116
Open AccessNo
Concepts (30)
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    AEROELASTIC RESPONSE
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    AEROELASTIC STABILITY
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    AEROELASTIC SYSTEM
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    BIFURCATION BEHAVIOR
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    CHAOS EXPANSIONS
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    FLUTTER BOUNDARIES
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    Galerkin
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    MANEUVERING CAPABILITY
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    MODERN STRUCTURES
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    Non-intrusive
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    NONLINEAR AEROELASTIC SYSTEM
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    Parametric uncertainties
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    POLYNOMIAL CHAOS
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    Polynomial chaos expansion
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    STOCHASTIC BIFURCATION
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    STOCHASTIC FRAMEWORK
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    SYSTEM UNCERTAINTIES
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    Uncertainty quantifications
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    WIND TURBINE ROTORS
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    Acoustic noise
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    Bifurcation (mathematics)
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    Fluid structure interaction
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    FLUIDS
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    Probability density function
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    Stochastic systems
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    Structural design
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    Turbomachine blades
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    Uncertainty analysis
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    Vibrations (mechanical)
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    Aeroelasticity