Non-linear dynamics of jointed systems under dry friction forces

Abstract

Dry friction devices are usually adopted to reduce structure vibrations. Generally, an optimisation procedure is required to tune the system coefficients by performing the best effect. In this paper a continuous structure coupled with a lumped dissipative system is studied. This second system is alternatively loaded by a dry friction force, so that two states can be recognized: contact and not-contact. Aim of this work is the study of the system parameters influence on the structure response when the system passes through the different states before presented. In particular, during the contact state a stickslip motion of the lumped system is considered. The analysis is focused on the transition between chaotic and non-chaotic behaviour and on the correspondent power flows between continuous and lumped system during the motion.