3-D acoustic infinite element based on an oblate spheroidal mult

Details 3-D acoustic infinite element based on an oblate spheroidal mult 3-D acoustic infinite element based on an oblate spheroidal mult

1995-05-18

1997-02-18

Teska, Kevin J.

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364578, 36472403, 364803, 395119, G06F 1716

Patent

active

056048939

ABSTRACT:
In an improvement over conventional finite element techniques, an oblate spheroidal infinite element is used for the modeling of acoustic fields in exterior, fluid-filled domains surrounding a structure. This oblate infinite element is based on a multipole expansion that describes, to arbitrary accuracy, any scattered and/or radiated field exterior to an oblate spheroid of any eccentricity. The oblate infinite elment is readily incorporated in any structural or acoustical finite element code.

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P. Bettess, "Infinite elements," Int. J. Num. Methods Eng. 11, pp. 53-64 (1977) (month is not available).
O. C. Zienkiewicz, K. Bando, P. Bettess, C. Emson, and T. C. Chiam, "Mapped infinite elements for exterior wave problems," Int. J. Num. Methods Eng. 21, pp. 1229-1251 (1985) (month is not available).
David S. Burnett, "Finite Element Analysis From Concepts To Applications," Addison-Wesley Publishing Company (1987--month is not available).
Carson Flammer, "Spheroidal Wave Functions," Stanford University Press, Stanford, CA, 1957, pp. 6-10 (month is not available).
David S. Burnett, "A Three-Dimensional Acoustic Infinite Element Based on a Prolate Spheroidal Multipole Expansion," The Journal of the Acoustical Society of America, vol. 96, No. 5, Pt. 1, Nov. 1994, pp. 2798-2816.

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