LARGE-AMPLITUDE VIBRATION OF A BEAM RESTRAINED BY A NONLINEAR SLEEVE JOINT

The damping characteristics of built-up structures damped predominantl y by dry friction are studied. In particular, the influence of the fas tening condition at the end of a beam on the nature and on the amount of passive damping is investigated. The fastening arrangement is model led by a non-linear sleeve joint that includes the effects of dry fric tion, transverse and longitudinal restraint, clearance, and dissipatio n through impact. This sleeve joint model is combined with a large amp litude flexible beam model that accounts for beam extensibility and fo reshortening. Time simulations of the free response are studied to det ermine the effect of various beam and joint parameters on the system v ibratory characteristics. It is found that beam extensibility has a si gnificant effect on the system's damping characteristics, especially w hen the sleeve has a relatively stiff retaining spring. The findings a re compared to the trends observed for simplified models in order to g ain further insight. (C) 1995 Academic Press Limited