The acoustic power radiated by a circular membrane excited for vibration both by means of the edge and by external surface load

• Autorzy: Szemela K. , Rdzanek W. P. , Rdzanek W.
• Języki publikacji: EN

Abstrakty

EN

In this paper the acoustic power of the circular membrane, excited both by the edge and external exciting forces uniformly distributed over the whole surface, is examined. Some different amplitudes of exciting factors and some differences between the phases of excitations were considered. It has been assumed that the source of a sound is located in a flat, rigid and infinite baffle and is sourrounded by a lossless and homogeneous fluid medium. The vibrations are axisymmetric and time-harmonic. Employing the Cauchy's theorem of residues and asymptotic formulae for the Bessel functions, the asymptotes for active and reactive power consisting of elementary functions are obtained. The acoustic power radiated by the membrane was shown graphically in terms of the parameters describing both kinds of excitations.

Słowa kluczowe

EN

acoustic radiation power; vibrations of a spherical membrane; excitation produced by edge and surface loads; amplitude-phase effects

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2005
• Tom: Vol. 30, No. 1
• Strony: 109--119
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Szemela K.

• University of Rzeszów, Rejtana 16a, 35-310 Rzeszów, Poland

autor

Rdzanek W. P.

• University of Rzeszów, Rejtana 16a, 35-310 Rzeszów, Poland

autor

Rdzanek W.

• University of Rzeszów, Rejtana 16a, 35-310 Rzeszów, Poland

Bibliografia

• [1] LEVINE H., LEPPINGTON F. G., A note on the acoustic power output of a circular plate, Journal of Sound and Vibration;121, 269-275 (1988).
• [2] MALECKI I., Teoria fal i układów akustycznych, PWN, Warszawa 1964.
• [3] RDZANEK W. J., RDZANEK JR. W. P., ENGEL Z., The total sound power radiated by a circular plate with a hole in its center, Mechanika, 22, 395–403 (2003).
• [4] RDZANEK W. J., RDZANEK W. P., SZEMELA K., Effect of excitation of the edge of a circular membrane on the sound radiation [in Polish], Otwarte Seminarium z Akustyki OSA 50, Szczyrk 2003.
• [5] RDZANEK W. P., ENGEL Z., RDZANEK W. J., Phase compensation of acoustic pressure of a plane annular plate [in Polish], Metody aktywne redukcji drgań i hałasu, Kraków-Krynica, 249–256, 2001.
• [6] RDZANEK JR W. P., The energy aspect of the reciprocal interactions of pairs of two different vibration modes of a clamped annular plate, Journal of Sound and Vibration, 249, 2, 307–323 (2002).
• [7] RDZANEK JR W. P., The sound power of an individual mode of a clamped- free annular plate, Journal of Sound and Vibration, 261, 775–790 (2003).
• [8] SKUDRZYK E., Simple and complex vibratory systems, University Press, University Park and London 1968.
• [9] WATSON G. N., Theory of Bessel functions, University Press, Cambridge 1966.