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

6 Scopus citations

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 publication44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003 - Norfolk, VA, United States
Duration: Apr 7 2003Apr 10 2003

Publication series

Name44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003
CountryUnited States
CityNorfolk, VA
Period4/7/034/10/03

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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