Accession Number:

ADA127316

Title:

Sound Radiation from a Cylindrical Pipe Composed of Concentric Layers of Fluids and Elastic Solids.

Descriptive Note:

Technical memo.,

Corporate Author:

ADMIRALTY MARINE TECHNOLOGY ESTABLISHMENT TEDDINGTON (ENGLAND)

Personal Author(s):

Report Date:

1983-01-01

Pagination or Media Count:

36.0

Abstract:

The cylindrical pipe is composed of a number of concentric layers of elastic solids and fluids. It is excited by time-harmonic mechanical point forces or acoustic sources. The exact linear equations of elastodynamics, visco-dynamics and acoustics are solved to obtain, via the finite element method, a matrix equation which connects interface displacements and external forces in the spectral domain. Far-field sound radiation and the wavenumbers of free-waves are obtained from this relation. Numerical results include a comparison of sound radiation levels obtained from the exact theory and a shell theory. Author

Subject Categories:

  • Theoretical Mathematics
  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE