Vibrations in Flexible Rotor Systems with Friction

Self-sustained vibrations which can appear in mechanical systems often limit the performance of such systems or can even cause failure or damage to them. Although a lot of theoretical research has been done on vibrations in flexible rotor systems, a limited number of papers are available including experimental results on the interaction between different types of vibrations. Here, we address friction-induced vibrations in flexible mechanical systems, lateral vibrations caused by mass-unbalance in rotor systems and the interaction between those two types of vibrations. Analysis of a set-up, when both torsional and lateral vibrations are present, leads to the conclusion that friction-induced torsional vibrations and torsional vibrations due to coupling between torsional and lateral dynamics may appear. Furthermore, if mass-unbalance is present in the system, the amplitude of friction-induced vibrations and the region in which these vibrations occur, both decrease compared to the situation without mass-unbalance. Moreover, it is shown that if the mass-unbalance is large enough then torsional vibrations can disappear entirely.

Autorentext

was born in Zajecar, Serbia on Nov. 7th, 1971. He graduated at the Faculty of Electronic Engineering, in NiS, Serbia and he finished his PhD at the Department of Mechanical Engineering in Eindhoven, The Netherlands. Then he started working at the Philips Research Eindhoven on various projects related to minimally invasive healthcare devices.