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NASA NTRS · 20170000462

New Flutter Analysis Technique for Time-Domain Computational Aeroelasticity

Pak, Chan-Gi·Lung, Shun-Fat
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Abstract

This presentation is a conference companion and discusses a new flutter analysis technique using CFD results.

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Pak, Chan-Gi, Lung, Shun-Fat. 2017-01-09. New Flutter Analysis Technique for Time-Domain Computational Aeroelasticity. https://ntrs.nasa.gov/citations/20170000462

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NASA NTRS2017

New Flutter Analysis Technique for Time-Domain Computational Aeroelasticity

A new time-domain approach for computing flutter speed is presented. Based on the time-history result of aeroelastic simulation, the unknown unsteady aerodynamics model is estimated using a system identification technique. The full aeroelastic model is generated via coupling the estimated unsteady aerodynamic model with the known linear structure model. The critical dynamic pressure is computed and used in the subsequent simulation until the convergence of the critical dynamic pressure is achieved. The proposed method is applied to a benchmark cantilevered rectangular wing.

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