Abstract
Keywords: kinematic elements, displacement fields, vibrations, mathematical model.
First of all, using the mechanical model with four concentrated masses, the mathematical model of vibrations in case of a linear-elastic connecting rod, part of a parallelogram mechanism, is presented. Afterwards, the cross displacement field is determined. For a concrete case, the diagrams of cross displacement in relation with time and with distribution of points are given. The knowledge of displacement fields as a result of the vibrations for the kinematic elements is a preceding stage for the determination of the stress and strain states, useful in machines designing.