Tilt-wing and tilt-rotor unmanned aerial vehicles (UAVs) represents promising direction for the future development. This paper presents the method for the preliminary design optimization of the propeller for such vehicle. It should be capable to generate high thrust in both forward flight&#x...

This paper deals with a suitable approach to the computational modelling of rolling element bearings in the framework of rotating systems dynamics. Various alternative approaches are briefly summarized and a chosen moderately complex approach is described in more detail. The presented bearin...

This paper presents discrete mathematical model for linear mechanical system composed of a steel cantilever beam with added mass at the beam's free end and further mass suspended on the beam by means of a tension spring. System parameters were first obtained by their direc...

This article describes a pressure thermal shock simulation methodology and procedure. The article also describes the pressure thermal shock phenomenon (PTS) within a reactor pressure vessel resulting from a small-break loss of coolant accident. The SB-LOCA transient is modelled using a trans...

The contribution focuses on the modelling of vibration of 1D beam-type continua induced by cross flow of a fluid. The influence of fluid flow is represented by the harmonic force whose frequency depends on the Strouhal number. Based on the widely used FEM formulation, vector&#...

Production of plastic parts by injection moulding is accompanied by many defects, usually caused by the shrinkage of the material. Despite the effort of manufacturers, it is not possible to get rid of all defects from manufactured parts. These defects can be places of later&#x...

The contribution deals with analysis of dynamical properties of 1 DOF bistable mechanical oscillators. These systems appear in many technical applications which advantageously use their both static and dynamic properties. First, a mechanical mode based on von Mises truss is introduced and&#x...

A mathematical description of multibody mechanical systems containing flexible bodies often leads to a nonlinear set of differential–algebraic equations of motion which can be solved using various numerical integration schemes. In this paper, the possibilities of the commonly known Newmark integr...

This papper deals with modelling of blood perfusion in the liver tissue and focuses on the identification of the model parameters. For a description of perfusion a multi-compartment Darcy model is used. This model describes a hierarchical flow in the tree structure of the live...