FORTRAN Computer Programs for Calculating the Axisymmetric Acoustic Radiation from Two Coaxial Spheroids.
Abstract
The computer programs PSPRDS and OSPRDS calculate acoustic radiation from two prolate and two oblate spheroids, respectively. The programs use an eigenfunction expansion of the appropriate Green's function in spheroidal wave functions. An addition theorem which expresses spheroidal wave functions in one coordinate system in terms of spheroidal wave functions in another coordinate system is used to facilitate application of homogeneous Neumann boundary conditions on the two spheroids in order to determine the unknown expansion coefficients. Only axially symmetrical problems are handled by the programs. The basic inputs to the programs are the geometry of the spheroidal configuration and the normal velocity distribution on the surface of each spheroid. The output consists of radiation impedances, the azimuthal far-field pressure distribution, and near-field pressures at desired points. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 16, 1974
- Accession Number
- AD0786352
Entities
People
- A. L. Van Buren
- B. J. King
Organizations
- United States Naval Research Laboratory