Structure-Borne Noise and Sound Radiation Associated with a Point Driven Grid Supported Infinite Plate.
Abstract
A general solution has been developed for the transform responses and the radiated pressure associated with a fluid loaded, orthogonal grid supported plate driven by a harmonic point force. For the case of light or no fluid loading the solution is in a closed form. A particular interest in developing this solution was to determine the structural pass-band characteristics of such a structure in terms of the inertial and elastic properties of the beams composing the grid as well as the plate itself. It is shown that at any given frequency there always exist some set of structural wave numbers (kx, ky) that represent freely propagating waves. This result is in contrast to previous one-dimensional analyses that result in specific tests of propagating and nonpropagating bands. The nature of the response of the structure as a function of frequency is provided in terms of the various inertial and elastic properties of the structure, and an analogy is drawn with the one-dimensional result in terms of propagating wave number sets being confronted with an inertial or compliant impedance. The analogy results in the propagating pass bands flipping about the one-dimensional dlamped-clamped resonant frequencies.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1979
- Accession Number
- ADA075201
Entities
People
- J. M. Garrelick
- W. T. Ellison