Identification of zones of increased vibroacoustic emission by means of the inverse method

• Autorzy: Stryczniewicz L.
• Języki publikacji: EN

Abstrakty

EN

The basic formulas concerning the inversion are presented in the paper. Examples of the author's studies on the possibility of the localization of zones of increased vibroactivity by means of the inverse method are given. The inverse method is very sensitive to the position of substitute sources. This feature can be used for the determination of the position of actual sources. The accuracy of the method depends also on the distribution of the observation points. The dependence of the position of substitute sources on their acoustic power level is discussed in the paper as well. The distribution of the acoustic fields around the air compressor is given as an example. The~measurements were performed at the points distributed on a semi-sphere. Both the amplitude and phase of the acoustic pressure were determined at each measuring point. On the basis of the results obtained, the zones of increased acoustic emission were searched for.

Słowa kluczowe

EN

acoustic modeling; inverse method; sound source

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2004
• Tom: Vol. 29, no. 4
• Strony: 563--576
• Opis fizyczny: Bibliogr. 7 poz., fot., rys., wykr.

Twórcy

autor

Stryczniewicz L.

• AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland,

Bibliografia

• [1] ENGEL Z., STRYCZNIEWICZ L., Problem of source modelling, Archives of Acoustics, 20, 1, 27–37 (1995).
• [2] ENGEL Z., PLEBAN D., STRYCZNIEWICZ L., Inversive method of determination of emissions sound pressure level for the proposes of the acoustic assessment of machines, Proc. Inter. Congress of Sound and Vibration, 1607–1615, Hong-Kong 2001.
• [3] ENGEL Z, STRYCZNIEWICZ L., Vibro-acoustic modelling of machines, Bulletin of the Polish Academy of Sciences, Technical Sciences, 49, 2, 379–392 (2001).
• [4] GRACE S. P., ATASSI H. M., BLAKE W. K., Inverse aeroacoustics problem for a streamlined body, Part I: Basic formulation, AIAA Journal, 34, 2233–2240 (1996).
• [5] MAŃCZAK K., NAHORSKI Z., Computer identification of dynamic objects, PWN, Warszawa 1983.
• [6] NELSON P. A., A review of some inverse problems in acoustics, International Journal of Acoustics and Vibrations, 6, 3, 118–134 (2000).
• [7] WIRGUI A. [Ed.], Wavefield inversion, Springer Wien, New York 1999.