Accession Number:

AD0636531

Title:

DIFFRACTION OF PULSES BY OBSTACLES OF ARBITRARY SHAPE WITH A ROBIN BOUNDARY CONDITION. PART A. SEMI-RIGID CASE.

Descriptive Note:

Summary rept.

Corporate Author:

STATE UNIV OF NEW YORK BUFFALO DIV OF INTERDISCIPLINARY STUDIES AND RESEARCH

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

56.0

Abstract:

The potential field and its derivatives pressure and velocity resulting from the diffraction of a plane acoustic pulse by an obstacle of arbitrary shape with a Robin boundary condition, is obtained as the solution to an integro-differential equation. The specific geometry of a long cylinder with a square cross section struck longitudinally by a plane pulse is solved for values of the pressure on the scattering surface for the semi-rigid case K 1. A major portion of the solution is obtained exactly. The remainder involves a numerical approximation of a surface integral by a double summation over specified steps in space and time leading to a weakly coupled set of simultaneous equations at eact time step. Comparison with available exact solutions indicates good agreement. Author

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE