Non-classical methods of vibration damping in machine elements

Aim of project
The project is closely related to problems of reduction and stabilisation of vibration in machine elements and mechanical devices. The subject of analysis are active methods of vibration damping based on an active approach taking advantage of control strategies reflecting the state of a given system or tracing its current operational parameters. An alternative are active methods consisting in application of so-called “intelligent” materials and actuators such as piezoelectrics, piezoelectric laminates, functionally graded elements, shape memory alloys, electrorheological fluids, etc. In the project, magnetic actuators for contactless vibration suppression are introduced as a separate research problem. Beyond magnetic reduction of transverse vibration of beams, the authors off er thorough examinations of dynamical phenomena in rotating systems such as rigid rotors supported on journal bearings with respect to the possibility of appearance of irregular or even chaotic motion. Additionally, two other investigation tasks are predicted in the project. They constitute extensions of the research programs that have been recently realised by the authors. These are: discrete modelling of properties of shock absorbers with liquid, frictional and elastomer components and estimation of the stress and strain state at the bottom of a notch in an energetic description.

Expected results
The Expected results include publications in journals of international impact and frequent presentations during conferences and symposia. Preparation of three doctoral theses is also predicted.