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Accession Number:
AD0607257
Title:
Energy Dissipation at Structural Joints; Mechanisms and Magnitudes
Corporate Author:
BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA
Report Date:
1964-08-01
Abstract:
A largely experimental study is described, which indicates that dissipation of vibratory energy at multi-pointfastened bolted, riveted, spot- welded joints connecting panels to stiffeners or to other panels, at frequencies considerably above the panel fundamental, is primarily due to the pumping of air produced as adjacent surfaces between fasteners move away from and toward each other. A study of the energy dissipation characteristics of plate-strips whose ends are bolted to rigid supporting structures is discussed. From comparison of data obtained by direct measurement of energy dissipation with analysis for a number of possible mechanisms it is concluded that interface slip plays a minor role in such bolted joints. Damping here appears to be primarily associated with relative motions normal to the mating surfaces.
Descriptive Note:
Technical documentary rept. Dec 1962-Apr 1964
Supplementary Note:
DOI: 10.21236/AD0607257
Pages:
0142
Distribution Statement:
Approved for public release; distribution is unlimited.
Contract Number:
AF 33(657)-10125
File Size:
59.15MB
