Archives of Acoustics, 25, 1, pp. 73-81, 2000

Directional characteristics of a planar annular plate for axially-symmetric free vibrations

W. P. Jr. RDZANEK
Pedagogical University, Department of Acoustics
Poland

Z. ENGEL
University of Mining and Metallurgy Department of Vibro-Acoustics
Poland

There is solved a coastal problem of the acoustic wave radiation at Fraunhofer zone for a planar annular plate vibrating harmonically. It is assumed that a plate is clamped with both its banks, inner and outer, into a planar rigid baffle. There is an analysis of axially-symmetric free vibrations. There are directional-frequency characteristics for both kinds of sources - annular plate and annular membrane.
Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

M. Amabili, G. Frosali and M.K. Kwak, Free vibrations of annular plates coupled with fluids, J. of Sound and Vibration, 191, 5, 825–846 (1996).

C.D. Deffayet and P.A. Nelson, Active control of low-frequency harmonic sound radiated by a finite panel, J. of the Acoustical Society of America, 84, 6, 2192–2199 (1996).

Z. Engel, Development of active methods in Poland [in Polish], Materials of III-rd School “Active Methods of Vibration and Noise Reduction”, Zakopane 1997, pp. 53–57.

C.R. Fuller, Active control of sound transmition/radiation from elastic plates by vibration inputs, I. Analysis, J. of Sound and Vibration, 136, 1, 1–15 (1990).

E. Janke, F. Emde and F. Losch, Tafeln hoherer funktionen, B.G. Teubner Verlagsgesellschaft, Stuttgard 1960.

H. Levine and F.G. Leppington, A note on the acoustic power output of a circular plate, J. of Sound and Vibration, 121, 2, 269–275 (1988).

I. Malecki, Physical foundations of technical acoustics, Pergamon Press, Oxford 1969.

W.P. Rdzanek Jr. and Z. Engel, The acoustic radiation power of a planar annular plate for the form of vibrations (0, n) [to be published in proceedings of Forum Acusticum ‘99, Berlin 1999, This work is realized within a framework of the KBN project no T07B01812.

W.J. Rdzanek and W.P. Rdzanek, Jr., The real acoustic power of a planar annular membrane radiation for axially-symmetric free vibrations, Archives of Acoustics, 22, 4, 455–462 (1997).

W.J. Rdzanek and W.P. Rdzanek, Jr., The acoustic reactance radiated by a planar annular membrane for axially¯symmetric free vibrations, [to be published in Archives of Acoustics].

S.M. Vogel and D.W. Skinner, Natural frequencies of transversely vibrating uniform annular plates, J. of Applied Mechanics, 32, 926–931 (1965).