Accession Number : AD0622490

Title :   LONG PERIOD GRAVITY GRADIENT DAMPING,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Tossman,B. E.

Report Date : 02 JAN 1964

Pagination or Media Count : 20

Abstract : Preliminary findings are reported on the long period damping capacity of damper springs. The basic problem confronting this long period investigation has been the fact that the periods of interest are in the order of one hour and greater and therefore tend to preclude direct measurement experiments. Methods are presented whereby the damping capacity can be predetermined plus the results of recent long period experiments. It is shown that since internal friction is a manifestation of material anelasticity, Boltzmann's Superposition Principle can be used to develop a correlation between internal friction and anelastic creep. By simply measuring the fundamental anelastic properties of each damper spring, it therefore becomes possible to generate complete damping versus frequency curves.

Descriptors :   (*DAMPING, SPRINGS), (*GRAVITY, DAMPING), INTERNAL FRICTION, CREEP, ELASTIC PROPERTIES, DEFORMATION, LOADS(FORCES)

Distribution Statement : APPROVED FOR PUBLIC RELEASE