Abstract: This work presents a numerical investigation of the undesired lateral vibrations (whirling) occurring in drill-strings, which is one of the main sources of losses in drilling applications. The numerical studies are conducted ...

Abstract: In single degreeoffreedom (DOF) oscillators, impacts can occur with a barrier while in a system with multiple DOF, one can additionally observe impacts among interacting bodies. On the one hand, impacts are intrinsic for ...

Abstract: We study the synchronization of two rotating pendula mounted on a horizontal beam, which can roll on the parallel surface. The pendula are forced to rotate by different driving torques. It has been shown that after a ...

Abstract: The problem of controlling chaos, that is to convert the chaotic behaviour to a periodic time dependence is discussed. We described a number of effective controlling methods in the context of ...