The Substructures Technique Including Contact Problem

Abstract

The numerical analysis of large mechanical systems brings specific problems. As an example the contact of two surfaces can serve. The contact situation occurs when two surfaces touch each other. The pressure forces can be then transferred whilst the tension forces can not. The solution of mentioned large systems by FEM leads usually to the large number of degrees of freedom (DOF). Even the nowadays used HW equipment makes possible solving the large scale systems, in certain cases (especially when the number of DOFs exceeds approximately 1e7) it is convenient to use an alternative approach leading to shorter solution times and HW demands. One of these approaches is the substructure technique. The paper deals with the description of this technique used for the contact problem arising in the body of roller bearing.

The contribution to the modal analysis of the control system

“…A contact [12][13][14] was defined between the piston and the lever, and Coulomb's formulation was used for frictional force [15]. For springs used in the model, data on stiffness, damping and preload was entered [16].…”

Influence of Manufacturing Process on Stress Distributions in Mechanical Parts

“…The press fitting connection under the given pressure was realized by the temperature expansion of the cylindrical body located between the shaft and inner surface of both flanges. The temperature of that "artificial" body was iteratively changed until the required contact pressure p 1 was reached [3] (see also next chapter).…”