Accession Number : AD0611783

Title :   SEPARATION CRITERIA OF A NONLINEAR CONTACT SYSTEM IN A STEADY STATE SINUSOIDAL VIBRATION ENVIRONMENT.

Descriptive Note : Doctoral thesis,

Corporate Author : OKLAHOMA STATE UNIV STILLWATER

Personal Author(s) : Burkhart,Morris Charles

Report Date : MAY 1965

Pagination or Media Count : 84

Abstract : A preloaded, idealized set of contacts with a hardening nonlinear restoring element was studied to determine the separation criteria when the set was subjected to a steady state sinusoidal excitation. The criteria were determined theoretically for an undamped set of contacts; the effect of damping on the undamped criteria was studied qualitatively; selected undamped criteria were tested experimentally and the effect of a nonlinear jump response on the theoretical separation criteria was investigated experimentally. The study covered several degrees of nonlinear restoring forces and included the separation criteria of a linear set of contacts as a special case. The separation criteria was determined solely by the contact configuration and preload. The contact response amplitude for nonseparation varies from zero to large values, depending on the contact configuration. The configuration of one rigid and one flexible contact permited no response amplitude without separation while a linear configuration where each contact had the same natural frequency theoretically permits unlimited nonseparation amplitude. An increase of the nonlinearity of the hardening nonlinear restoring element decreased the allowable nonseparation response amplitude.

Descriptors :   (*ELECTRIC SWITCHES, VIBRATION), (*VIBRATION, ELECTRIC SWITCHES), SEPARATION, MECHANICS, DAMPING, ELECTRIC RELAYS, MATHEMATICAL MODELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE