A wavenumber analysis of the coupling of a structural mode and flow turbulence

A wavenumber analysis of the coupling of a structural mode and flow turbulence

Previous studies of the coupling of a structural mode and the pressure field induced by a highly subsonic turbulent boundary layer have been concentrated on the determination of the relative contributions by two regions of the wavenumber domain: the high-wavenumber region, at and near the hydrodynam...

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Veröffentlicht in:Journal of sound and vibration 1990-10, Vol.142 (1), p.135-152
Hauptverfasser: Hwang, Y.F., Maidanik, G.
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Sprache:eng
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Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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container_title Journal of sound and vibration
container_volume 142
creator Hwang, Y.F.
Maidanik, G.
description Previous studies of the coupling of a structural mode and the pressure field induced by a highly subsonic turbulent boundary layer have been concentrated on the determination of the relative contributions by two regions of the wavenumber domain: the high-wavenumber region, at and near the hydrodynamic coincidence, and the low-wavenumber region, at and near the modal wavenumber. The corresponding contribution to the coupling by the intermediate-wavenumber region that lies between the high- and low-wavenumber regions has not received proper attention. In this paper, formulae to estimate the contributions to the coupling by the three wavenumber regions are derived for some homogeneous structural panels with various boundary conditions, and numerical results are evaluated and compared. The relative contributions to the coupling among the three wavenumber regions vary with boundary condition, mode order number, and the ratio of the structural free wavenumber and the convective wavenumber at the modal resonance frequency. It is found that situations exist in which the contribution by the intermediate-wavenumber region may be significant.
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The corresponding contribution to the coupling by the intermediate-wavenumber region that lies between the high- and low-wavenumber regions has not received proper attention. In this paper, formulae to estimate the contributions to the coupling by the three wavenumber regions are derived for some homogeneous structural panels with various boundary conditions, and numerical results are evaluated and compared. The relative contributions to the coupling among the three wavenumber regions vary with boundary condition, mode order number, and the ratio of the structural free wavenumber and the convective wavenumber at the modal resonance frequency. 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subjects Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
title A wavenumber analysis of the coupling of a structural mode and flow turbulence
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