Mat-1.3656 Seminar on
numerical analysis and computational science
Monday, Jan 23, 2012, room
U322 at 14.15, Eirola & Stenberg
Anssi Karttunen, A" Department of Applied Mechanics
On the self-excited vibrations of a viscoelastically covered cylinder in rolling contact using FE method
As a result of ever-increasing speeds, the self-excited vibration of
polymer-covered cylinders in rolling contact is becoming a more serious
problem in many industrial processes. The vibration is generated by the
viscoelastic behavior of the polymer covers. In this work, this
vibration phenomenon, often referred to as barring, is studied using a
two-dimensional rolling contact finite element model. Readily available
finite element software and tools are used for modeling and
computations. The results show that barring vibration is a result of a
resonance condition created in the rolling contact system. The
vibration leads to the formation of a wave-like polygonal deformation
pattern on the polymer-covered cylinder. The finite element model can
provide detailed information on various phenomena, such as the nip
waves, which have not been detected before by simplistic models.