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TsAGI Science Journal

ISSN Imprimer: 1948-2590
ISSN En ligne: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v40.i3.70
pages 367-378

VIBRATIONS AND ACOUSTIC RADIATION OF THIN-WALLED STRUCTURES AT NONUNIFORM AEROACOUSTIC EXCITATION

Boris Maksimovich Efimtsov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180 Moscow region
Aleksander Yakovlevich Zverev
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180 Moscow region

RÉSUMÉ

One- and two-dimensional vibrations of bound thin-walled structures excited by the spatially nonuniform convective field of random pressure fluctuations are studied. Expressions for the spectral density of generalized forces for sinusoidal forms of elastic system vibrations are obtained, and expressions are developed for estimation of the vibrational energy and power of the thin-walled structure sound radiation, depending on the characteristic parameters of the excitation field. General principles of the vibrations and of the acoustic radiation of the bound and unbound elastic systems are established.

RÉFÉRENCES

  1. Efimtsov, Â. Ì. and Zverev, A. Ya., The principle regularities in elastic system vibrations at nonuniform aeroacoustic excitation.

  2. Bolotin, V. V., Broadband random vibration elastic systems.

  3. Lyon, R. H. and Maidanik, G., Statistical methods in vibration analysis.

  4. Efimtsov, Â. Ì., Vibrations and sound radiation of plates in the turbulent boundary layer.

  5. Fedoruk, M. V, Asymptotics: Integrals and Series.


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