Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping

Marc Mignolet, A. M. Agelastos, D. D. Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The focus of this paper is on providing a first validation of the possible role of friction as a stabilization mechanism in post-flutter limit cycle oscillations (LCO). To this end, four structural lumped mass models exhibiting both friction and a negative dashpot modeling the unstable aerodynamics were considered and their response computed by numerical simulation, through an exact formulation, and by the harmonic balance method. Continuous slip and stick slip LCO motions were indeed obtained in a broad range of negative damping ratios thereby demonstrating the stabilization potential of friction. A detailed analysis of the LCO responses in the time and frequency domains was performed to provide a more in depth phenomenological perspective. Finally, a comparison of the prediction strategies validated the use of both the exact formulation and the harmonic balance method for this class of problems.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Pages278-288
Number of pages11
Volume1
StatePublished - 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Norfolk, VA, United States
Duration: Apr 7 2003Apr 10 2003

Other

Other44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
CountryUnited States
CityNorfolk, VA
Period4/7/034/10/03

Fingerprint

Aerodynamics
Damping
Friction
Stabilization
Stick-slip
Computer simulation

ASJC Scopus subject areas

  • Architecture

Cite this

Mignolet, M., Agelastos, A. M., & Liu, D. D. (2003). Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (Vol. 1, pp. 278-288)

Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping. / Mignolet, Marc; Agelastos, A. M.; Liu, D. D.

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 1 2003. p. 278-288.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mignolet, M, Agelastos, AM & Liu, DD 2003, Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping. in Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. vol. 1, pp. 278-288, 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Norfolk, VA, United States, 4/7/03.
Mignolet M, Agelastos AM, Liu DD. Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 1. 2003. p. 278-288
Mignolet, Marc ; Agelastos, A. M. ; Liu, D. D. / Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping. Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 1 2003. pp. 278-288
@inproceedings{20fa818238a64a01a979911efd7a9811,
title = "Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping",
abstract = "The focus of this paper is on providing a first validation of the possible role of friction as a stabilization mechanism in post-flutter limit cycle oscillations (LCO). To this end, four structural lumped mass models exhibiting both friction and a negative dashpot modeling the unstable aerodynamics were considered and their response computed by numerical simulation, through an exact formulation, and by the harmonic balance method. Continuous slip and stick slip LCO motions were indeed obtained in a broad range of negative damping ratios thereby demonstrating the stabilization potential of friction. A detailed analysis of the LCO responses in the time and frequency domains was performed to provide a more in depth phenomenological perspective. Finally, a comparison of the prediction strategies validated the use of both the exact formulation and the harmonic balance method for this class of problems.",
author = "Marc Mignolet and Agelastos, {A. M.} and Liu, {D. D.}",
year = "2003",
language = "English (US)",
volume = "1",
pages = "278--288",
booktitle = "Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference",

}

TY - GEN

T1 - Impact of frictional structural nonlinearity in the presence of negative aerodynamic damping

AU - Mignolet, Marc

AU - Agelastos, A. M.

AU - Liu, D. D.

PY - 2003

Y1 - 2003

N2 - The focus of this paper is on providing a first validation of the possible role of friction as a stabilization mechanism in post-flutter limit cycle oscillations (LCO). To this end, four structural lumped mass models exhibiting both friction and a negative dashpot modeling the unstable aerodynamics were considered and their response computed by numerical simulation, through an exact formulation, and by the harmonic balance method. Continuous slip and stick slip LCO motions were indeed obtained in a broad range of negative damping ratios thereby demonstrating the stabilization potential of friction. A detailed analysis of the LCO responses in the time and frequency domains was performed to provide a more in depth phenomenological perspective. Finally, a comparison of the prediction strategies validated the use of both the exact formulation and the harmonic balance method for this class of problems.

AB - The focus of this paper is on providing a first validation of the possible role of friction as a stabilization mechanism in post-flutter limit cycle oscillations (LCO). To this end, four structural lumped mass models exhibiting both friction and a negative dashpot modeling the unstable aerodynamics were considered and their response computed by numerical simulation, through an exact formulation, and by the harmonic balance method. Continuous slip and stick slip LCO motions were indeed obtained in a broad range of negative damping ratios thereby demonstrating the stabilization potential of friction. A detailed analysis of the LCO responses in the time and frequency domains was performed to provide a more in depth phenomenological perspective. Finally, a comparison of the prediction strategies validated the use of both the exact formulation and the harmonic balance method for this class of problems.

UR - http://www.scopus.com/inward/record.url?scp=0043014908&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0043014908&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0043014908

VL - 1

SP - 278

EP - 288

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

ER -