For Better Performance Please Use Chrome or Firefox Web Browser

A. Sedaghat*, J.E. Cooper#, J. R. Wright§ and A.Y.T. Leung, LIMIT CYCLE OSCILLATION PREDICTION FOR AEROELASTIC SYSTEMS WITH CONTINUOUS NON-LINEARITIES, 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit,2000

41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit, Atlantic, USA, 2000.

 

LIMIT CYCLE OSCILLATION PREDICTION FOR AEROELASTIC SYSTEMS WITH CONTINUOUS NON-LINEARITIES

A. Sedaghat*, J.E. Cooper#, J. R. Wright§ and A.Y.T. Leung§

* Research Assistant  # Senior Lecturer  § Professor

Manchester School of Engineering

University of Manchester, Manchester M13 9PL, UK


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.

 

 

Conference Papers
Month/Season: 
April
Year: 
2000
File: