caa a22 4500 467954461 CHVBK 20180405193745.0 cr unu---uuuuu 170328e20041001xx s 000 0 eng 10.1007/s00419-004-0335-8 doi (NATIONALLICENCE)springer-10.1007/s00419-004-0335-8 (NATIONALLICENCE)springer-10.1007/BF02637209 Acoustic radiation from a finite spherical source placed in fluid near a poroelastic sphere [Elektronische Daten] [S. M. Hasheminejad, S. Mehdizadeh] Summary: Acoustic radiation from a finite spherical source, vibrating with an arbitrary, axisymmetric, time-harmonic surface velocity distribution, while immersed at an arbitrary point near a poroelastic sphere in an unbounded ideal fluid medium is analyzed in an exact manner. The formulation utilizes the appropriate wave-field expansions, along with the translational addition theorems for spherical wave functions in combination with the Biot classic model for the description of poroelastic material behavior, to develop a closed-form solution in form of infinite series. The prime objective is to investigate the dynamic poroelasticity effects on acoustic radiation and its associated field quantities. The analytical results are illustrated with a numerical example, in which the spherical source, excited in vibrational modes of zero-th or first order, is positioned near a water-saturated sandstone sphere. The basic acoustic field quantities such as the modal acoustic radiation impedance load on the source, the radiated far-field pressure directivity pattern, and the radial acoustic intensity distribution are evaluated and discussed for representative values of the parameters characterizing the system. Springer-Verlag Berlin Heidelberg, 2004 Biot's theory nationallicence Poroelastic sphere nationallicence Acoustic radiation nationallicence Addition theorem nationallicence Scatterer nationallicence Finite spherical source nationallicence Hasheminejad S. M. Department of Mechanical Engineering, Iran University of Science and Technology, 16844, Narmak, Tehran, Iran aut Mehdizadeh S. Department of Mechanical Engineering, Iran University of Science and Technology, 16844, Narmak, Tehran, Iran aut Archive of Applied Mechanics Springer-Verlag 74/1-2(2004-10-01), 59-74 0939-1533 74:1-2<59 2004 74 419 https://doi.org/10.1007/s00419-004-0335-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00419-004-0335-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hasheminejad S. M. Department of Mechanical Engineering, Iran University of Science and Technology, 16844, Narmak, Tehran, Iran aut NATIONALLICENCE 700 1- Mehdizadeh S. Department of Mechanical Engineering, Iran University of Science and Technology, 16844, Narmak, Tehran, Iran aut NATIONALLICENCE 773 0- Archive of Applied Mechanics Springer-Verlag 74/1-2(2004-10-01), 59-74 0939-1533 74:1-2<59 2004 74 419 NATIONALLICENCE 700 1- Hasheminejad S. Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16844, Tehran, Iran aut NATIONALLICENCE 700 1- Mehdizadeh S. Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16844, Tehran, Iran aut NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02637209 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer