Accession Number : AD0754754

Title :   Lateral Waves from a Continuous Transition Layer,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Jones,Hermenzo D.

Report Date : 21 NOV 1972

Pagination or Media Count : 24

Abstract : An exact integral expression is given for the velocity potential produced by a harmonic point source located in a semi-infinite isovelocity space. A transition layer separates the source region from a second constant velocity layer. A depth dependent sound speed with two adjustable parameters is employed for the transition region. The velocity potential for the lateral wave is obtained using the method of steepest descent. The results are in agreement with those for the special case of a linear transition layer. Inclusion of the lateral wave contribution should improve the theoretical predictions of pressure histories produced by underwater explosions at thermocline-related casutics that typically occur in the ocean at distances of less than five miles. These caustics are believed to be of tactical concern. (Author)

Descriptors :   (*UNDERWATER SOUND, PARTIAL DIFFERENTIAL EQUATIONS), MATHEMATICAL MODELS, INTEGRALS, BESSEL FUNCTIONS, UNDERWATER EXPLOSIONS, THERMOCLINES

Subject Categories : Numerical Mathematics
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE