The far-field sound produced by a rigid body in arbitrary motion, with shock discontinuities close to the body, is studied. The analysis is based on the work of Ffowcs Williams and Hawkings [1]. An expression for the far-field sound pressure is obtained in the form of surface and line integrals carr
Notes on the acoustic field of rigid bodies
β Scribed by F. Farassat
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 156 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0022-460X
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β¦ Synopsis
LETTERS TO THE EDITOR NOTES ON THE ACOUSTIC FIELD OF RIGID BODIES
This letter concerns the removal of a restriction in the analysis by the writer of the acoustic field ofrigid bodies [1]. It is shown that this restriction is mathematical and could be removed easily by replacing the moving body by a stationary.virtual radiating body whose shape is dependent on the observer time and location and also on the shape of the rigid body and its motion. The possible singularity of the present solution is then considered.
The problem will be discussed in connection with the solution of the following inhomogen-:ous wave equation:
π SIMILAR VOLUMES
This paper investigates the basic properties of the class of neighborhood-uniform node label controlled (NUNLC) graph grammars. The class of NUNLC grammars is distinguished by requiring a very natural restriction on the connection relations of NLC grammars. The restriction implies the "Church-Rosser