**1. Introduction**

Although it has previously been considered difficult to make further contributions in the field of mechanics, the spectacular evolution of technology and numerical calculation techniques has caused this opinion to be reconsidered and to the development of more and more sophisticated models that describe, as accurately as possible, the phenomena that take place in dynamic systems. Therefore, researchers have come to study mechanical systems with complicated behavior, observing them in experiments and computer models [1–3]. The key requirement in these studies is that the system must involve a nonlinearity. The impetus in mechanics and dynamical systems has come from many sources: computer simulation, experimental science, mathematics, and modeling [4–6]. There are a wide range of influences. Computer experiments change the way in which we analyze these systems. Topics of interest include, but are not limited to, modeling mechanical systems, new methods in dynamic systems, the behavior simulation of mechanical systems, nonlinear systems, multibody systems with elastic elements, multiple degrees of freedom, mechanical systems, experimental modal analyses, and the mechanics of materials.
