Accession Number : AD0474719

Title :   ANALYTICAL INVESTIGATION OF THE DAMPING CAPABILITY OF LAMINATED BEAMS.

Descriptive Note : Research and development rept. 1 Jul 64-30 Jun 65,

Corporate Author : PENNSYLVANIA MILITARY COLL CHESTER

Personal Author(s) : DiTaranto, Rocco A.

Report Date : 18 JUN 1965

Pagination or Media Count : 141

Abstract : The free and forced vibration of a three-layer, elastic-viscoelastic- elastic, beam are investigated. The results of previous studies are extended to obtain the boundary-condition equation for free and forced vibrations. These are written explicitly. Detailed results are obtained for the sandwich beam having a thin viscoelastic layer. Generalized results are obtained for the composite loss-factor and are plotted for use by a design engineer. Curves are available which simplify the determination of the natural frequencies and the associated mode shapes, and which aid in the calculation of the forced response. (Author)

Descriptors :   (*BEAMS(STRUCTURAL), SANDWICH CONSTRUCTION), DAMPING, LAMINATES, VIBRATION, VISCOELASTICITY, BOUNDARY VALUE PROBLEMS, SHIP NOISE, ATTENUATION, MATHEMATICAL ANALYSIS, RESONANT FREQUENCY, RESPONSE, RESONANCE, VIBRATION ISOLATORS.

Subject Categories : Marine Engineering
      Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE