Multi-Body Contact Dynamics Modeling of Roll Mechanisms in Paper Manufacturing Systems

A multi-body contact dynamics formulation is introduced to model the dynamic motion of roll mechanisms typical for paper manufacturing systems. Physical contact forces acting on the bodies in the joints are connecting the links of roll mechanisms together instead of purely kinematic constraints used in existing classical algorithms. In a similar way, external contacts between rolls manipulating the paper web are modeled as contact line loads in normal pressing and tangential traction directions. In the case study the loading dynamics of a paper finishing unit used in paper industry has been simulated in order to find out dynamically stable dimensioning for the critical parts in a new four-bar-linkage roll loading mechanism.