Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities

A. Sedaghat; J. E. Cooper; J. R. Wright; A. Y T Leung

doi:10.2514/6.2000-1397

Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities

A. Sedaghat
, J. E. Cooper
, J. R. Wright
, A. Y T Leung

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

Abstract

This paper describes an investigation into the prediction and characterisation of Limit Cycle Oscillations (LCO) occurring in non-linear aeroelastic systems. Through the use of Normal Form Theory, it is shown how it is possible to predict the amplitude of Limit Cycle Oscillations as function of two variables, the air speed and the reduced frequency. The approach is analytical and does away with the need for numerical simulation of the system. The methodology is demonstrated upon a simple two degrees-of-freedom aeroelastic wing model with cubic stiffness. The characteristics of the Limit Cycle Oscillations were determined and compared with those produced via numerical simulation. A good agreement was found for all the cases considered.

Original language	English
Pages (from-to)	499-507
Journal	Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume	1
Issue number	I
DOIs	https://doi.org/10.2514/6.2000-1397
Publication status	Published - 2000
Externally published	Yes
Event	41st AIAA/ASME/AHS/ASC Structures, Structural Dynamics, and Materials Conference and ExhibitAIAA/ASME/AHS Adaptive Structures ForumAIAA Non-Deterministic Approaches ForumAIAA Space Inflatables Forum - Atlanta, GA, USA Duration: 3 Apr 2000 → 6 Apr 2000

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title = "Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities",

abstract = "This paper describes an investigation into the prediction and characterisation of Limit Cycle Oscillations (LCO) occurring in non-linear aeroelastic systems. Through the use of Normal Form Theory, it is shown how it is possible to predict the amplitude of Limit Cycle Oscillations as function of two variables, the air speed and the reduced frequency. The approach is analytical and does away with the need for numerical simulation of the system. The methodology is demonstrated upon a simple two degrees-of-freedom aeroelastic wing model with cubic stiffness. The characteristics of the Limit Cycle Oscillations were determined and compared with those produced via numerical simulation. A good agreement was found for all the cases considered.",

author = "A. Sedaghat and Cooper, \{J. E.\} and Wright, \{J. R.\} and Leung, \{A. Y T\}",

year = "2000",

doi = "10.2514/6.2000-1397",

language = "English",

volume = "1",

pages = "499--507",

journal = "Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference",

issn = "0273-4508",

publisher = "American Institute of Aeronautics and Astronautics",

number = "I",

note = "41st AIAA/ASME/AHS/ASC Structures, Structural Dynamics, and Materials Conference and ExhibitAIAA/ASME/AHS Adaptive Structures ForumAIAA Non-Deterministic Approaches ForumAIAA Space Inflatables Forum ; Conference date: 03-04-2000 Through 06-04-2000",

}

Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities. / Sedaghat, A.; Cooper, J. E.; Wright, J. R. et al.
In: Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Vol. 1, No. I, 2000, p. 499-507.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities

AU - Sedaghat, A.

AU - Cooper, J. E.

AU - Wright, J. R.

AU - Leung, A. Y T

PY - 2000

Y1 - 2000

N2 - This paper describes an investigation into the prediction and characterisation of Limit Cycle Oscillations (LCO) occurring in non-linear aeroelastic systems. Through the use of Normal Form Theory, it is shown how it is possible to predict the amplitude of Limit Cycle Oscillations as function of two variables, the air speed and the reduced frequency. The approach is analytical and does away with the need for numerical simulation of the system. The methodology is demonstrated upon a simple two degrees-of-freedom aeroelastic wing model with cubic stiffness. The characteristics of the Limit Cycle Oscillations were determined and compared with those produced via numerical simulation. A good agreement was found for all the cases considered.

AB - This paper describes an investigation into the prediction and characterisation of Limit Cycle Oscillations (LCO) occurring in non-linear aeroelastic systems. Through the use of Normal Form Theory, it is shown how it is possible to predict the amplitude of Limit Cycle Oscillations as function of two variables, the air speed and the reduced frequency. The approach is analytical and does away with the need for numerical simulation of the system. The methodology is demonstrated upon a simple two degrees-of-freedom aeroelastic wing model with cubic stiffness. The characteristics of the Limit Cycle Oscillations were determined and compared with those produced via numerical simulation. A good agreement was found for all the cases considered.

UR - https://www.scopus.com/pages/publications/0033665733

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0033665733&origin=recordpage

U2 - 10.2514/6.2000-1397

DO - 10.2514/6.2000-1397

M3 - RGC 21 - Publication in refereed journal

SN - 0273-4508

VL - 1

SP - 499

EP - 507

JO - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

JF - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

IS - I

T2 - 41st AIAA/ASME/AHS/ASC Structures, Structural Dynamics, and Materials Conference and ExhibitAIAA/ASME/AHS Adaptive Structures ForumAIAA Non-Deterministic Approaches ForumAIAA Space Inflatables Forum

Y2 - 3 April 2000 through 6 April 2000

ER -

Limit cycle oscillation prediction for aeroelastic systems with continuous non-linearities

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