Accession Number:

ADA230088

Title:

Response of Regularly Ribbed Fluid Loaded Panels

Descriptive Note:

Corporate Author:

DAVID TAYLOR RESEARCH CENTER BETHESDA MD

Personal Author(s):

Report Date:

1990-11-01

Pagination or Media Count:

32.0

Abstract:

This paper presents computer estimations of the response of mechanically driven regularly ribbed fluid loaded panels. The estimates are presented in terms of the spectral distribution of the acceleration of the panel and the spectral distribution of the pressures in the fluid. The ribs are defined in terms of line and line moment impedances these may be mass, resistance, andor stiffness controlled, and of various values and combinations. Typical estimations of the spectral distribution of the magnitudes of the acceleration are displayed as functions of the normalized wavenumber that lies in the plane of the panel and normal to the ribs and the normalized frequency. The magnitudes of the acceleration vanish at the sonic loci when fluid loading is included. A sonic gorge, with a nadir at the sonic loci, characterizes the acceleration of the fluid loaded panel, whether unribbed or ribbed. If the magnitudes of the line impedances and, when appropriate, also the line moment impedances of the ribs are not unusually high, the magnitudes of the acceleration and their patterns elsewhere in the spectral domain remain substantially similar to those obtained in the absence of fluid loading.

Subject Categories:

  • Acoustics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE