Accession Number : AD0439491

Title :   SUITABILITY OF MIL-P-23653 MATERIAL FOR DAMPING MECHANICAL VIBRATIONS IN LIGHT STEEL PLATING,

Corporate Author : MARE ISLAND NAVAL SHIPYARD VALLEJO CALIF RUBBER LAB

Personal Author(s) : James,R. R.

Report Date : 12 MAY 1964

Pagination or Media Count : 71

Abstract : The suitability of the damping material described in Specification MIL-P-23653 for application to light steel plates in ballast tanks and superstructure areas of submarines was investigated. The principal findings were: (1) damping efficiency of both constrained and unconstrained treatments on 3/8-in. -thick plates over the frequency range of 50 to 1,500 c is very good with best average damping being obtained at 55 and 75 F, (2) the tiles of damping material must be constrained to prevent possible detachment by mechanical shock. The studs on which the constrained treatment is secured should be 3/8-in. diameter minimum and the studs should be so spaced that at least one stud will be located in each title, (3) the damping treatment should be bonded to the steel plate but not to the constraining layer, (4) the interface between the constraining layer and the damping material must be lubricated for best damping efficiency, and (5) the damping material must have low permanent compressibility under deep submergence pressures in order to prevent loosening of constraining layers in service. (Author)

Descriptors :   (*ACOUSTIC INSULATION, METAL PLATES), (*MECHANICAL WAVES, DAMPING), VIBRATION, SUBMARINES, SUBMARINE NOISE, VINYL PLASTICS, EPOXY RESINS, SHOCK RESISTANCE, ADHESION, STABILITY, COMPRESSIVE PROPERTIES, STEEL, PLASTICS, SHEETS, BONDING, ADHESIVES, COMPOSITE MATERIALS, LAMINATES, LAMINATED PLASTICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE