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- W2000974533 abstract "Predictions of flow-induced flat plate vibrations using a finite-element structural model and the modified Corcos cross-spectral model as the forcing function [Hambric and Hwang, Proceedings of Inter-Noise 2000, Nice, France, 27–30 August (2000)] agree very well with the measured [Han et al., J. Sound Vib. 227(4), 685–709 (1999)] plate vibrations. However, extremely fine finite-element meshes had to be used to resolve the streamwise variations of the coherence function. This approach is not computationally tractable for most large complex structures. This paper discusses a practical approach of utilizing an approximated discrete forcing function model, which represents only the low-wavenumber region of the excitation in terms of the cross-spectra of grid forces. The high-wavenumber (convective ridge) content of the excitation is thus ignored. This method is believed more feasible in practice because the finite-element meshes now need only resolve the structural wave scale instead of the convective turbulence scale. This approximated forcing function model is assessed against the exact model and found to be satisfactory in most cases except when the structural mode wavenumbers are close to the convective ridge. [Work supported by ONR, Code 333.]" @default.
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- W2000974533 date "2000-11-01" @default.
- W2000974533 modified "2023-09-24" @default.
- W2000974533 title "Forcing function models for structures excited by low‐speed flow" @default.
- W2000974533 doi "https://doi.org/10.1121/1.4743028" @default.
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