Accession Number : ADP004711

Title :   Structural Damping Potential of Waveguide Absorbers,

Corporate Author : BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA

Personal Author(s) : Ungar,E. E. ; Kurzweil,L. G.

Report Date : NOV 1984

Pagination or Media Count : 15

Abstract : Results of a preliminary study indicate that waveguide absorbers - structural elements that extract energy from vibrating structures in the form of traveling waves - may serve as effective vibration reduction means. Expressions are presented that indicate how the damping effectivenesses of waveguide absorbers attached to structures depend on absorber and structural parameters. Realizations of waveguide absorbers in terms of damped tapered rods and beams are described. Data are presented that illustrate that suitable waveguide absorber installations can provide considerable damping, even of massive structures, with relatively little weight penalty. The damping of a thin plate by means of a waveguide absorber is compared to that of viscoelastic layer treatments of the same weight. (Author)

Descriptors :   *DAMPING, *WAVEGUIDES, *ENERGY ABSORBERS, TRAVELING WAVES, VIBRATION, COMPUTATIONS, EXPERIMENTAL DATA

Distribution Statement : APPROVED FOR PUBLIC RELEASE