A reduced-order model for the lift coefficient on a transversely oscillating cylinder

Muhammad R. Hajj, Lihai Qin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

A consistent approach for the development of reduced-order models for the lift coefficient on a circular cylinder undergoing forced transverse oscillations is presented. Higher-order spectral analysis is applied to RANS-generated data to characterize the nonlinear couplings in the time series. Based on this analysis, it is shown that the forced van der Pol equation should be used to model the lift coefficient on the transversely oscillating cylinder. Analysis for three cases of forced excitations, namely resonance and no resonance with soft and hard excitations, is presented. Spectral parameters derived from spectral analysis of the RANS data are combined with approximate solutions of the representative model to determine its parameters. Model validation is achieved by comparing time and frequency domain characteristics of data obtained from the forced van der Pol equation with the RANS data.

Original languageEnglish
Pages (from-to)6151-6162
Number of pages12
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume9
DOIs
StatePublished - 2005
Event46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Austin, TX, United States
Duration: 18 Apr 200521 Apr 2005

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