Multipole Expansion of Sound Radiation from Moving Rigid Bodies
作者:
Thomas J. Eisler,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1972)
卷期:
Volume 52,
issue 1B
页码: 210-215
ISSN:0001-4966
年代: 1972
DOI:10.1121/1.1913081
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The solution of the wave equation with a source term extended in space and moving as a rigid body with translation and rotation is expanded about an interior point in terms of point multipoles, which are expressed as spatial derivatives of the Liénard‐Wiechert solution for a monopole. An application to sound radiation from moving rigid bodies is given using the theory of Ffowcs‐Williams and Hawkings. As examples, the radiation fields of a rotating ellipsoid and a sphere in accelerated rectilinear motion are estimated.
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