Modeling of acoustic field for a parametric focusing source using the spheroidal beam equation

• Autorzy: Yu L. , Li J. , Shi C.

Identyfikatory

DOI

10.1515/pomr-2015-0031

• Języki publikacji: EN

Abstrakty

EN

A theoretical model of acoustic field for a parametric focusing source on concave spherical surface is proposed. In this model, the source boundary conditions of the Spheroidal Beam Equation (SBE) for difference frequency wave excitation were studied. Propagation curves and beam patterns for difference frequency component of the acoustic field are compared with those obtained for Khokhlov-Zabolotskaya-Kuznetsov (KZK) model. The results demonstrate that the focused parametric model of SBE is good valid for a large aperture angle in the strongly focused acoustic field. It is also investigated that high directivity and good focal ability with the decreasing of downshift ratio and the increasing of half-aperture angle for the focused parametric model of SBE.

Słowa kluczowe

EN

parametric focusing source; difference frequency wave; SBE; acoustic field

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2015
• Tom: S 1
• Strony: 43--47
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Yu L.

• Department of Navigation Technology Shanghai Maritime University 200136 Shanghai China

autor

Li J.

• College of Ocean Science and Engineering Shanghai Maritime University 200136 Shanghai China

autor

Shi C.

• Department of Navigation Technology Shanghai Maritime University 200136 Shanghai China

Bibliografia

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• 3. J . Naze Tjфtta, S. Tjфtta and E.H. Vefring, Effects of focusing on the nonlinear interaction between two collinear finite amplitude sound beams, J.Acoust.Soc.Am. 1991, 89 (3), 1017-1027.
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• 7. R.M. Xia, W.D. Shou, G.P. Chen and M,D. Zhang, The further study of the spheroidal beam equation for focused finite-amplitude sound beams, J.Comput. Acoust. 2003, 11 (1), 47-53.
• 8. S .Y. Qian, T. Kamakura and M. Akiyama, Simulation of sound field in a tissue medium generated by a concave spherically annular transducer, Ultrasonics, 2006, 44 (1), 271-274.
• 9. T. Kamakura, N. Hamada, K. Aoki, and Y. Kumamoto, Nonlinearly generated spectral components in the nearfield of a directive sound source. J.Acoust.Soc.Am. 1989, 85 (6), 2331-2337.
• 10. T . Kamakura, T. Ishiwata and K. Matsuda, Model equation for stringly focused finite-amplitude sound beams, J.Acoust.Soc.Am. 2000, 107 (6), 3035-3046.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.