Roller bearing is one of the most widely used and critical elements in rotating machinery. In consequence, bearing fault diagnosis in machines, as well as to discriminate the different fault conditions have been a great interest. In this study, firstly, analytical model of a shaft-ball bearing system is developed. The shaft is assumed to be perfectly rigid and uniform, and supported by two radi...

A fault diagnosis system based on LabVIEW is researched to analyze the rotating machinery fault. By developing data acquisition, signal analysis, processing and simulation, pattern recognition and fault diagnosis modules, this system can automatically measure and identify the shaft orbit of a rotor and get fault results. A pattern recognition method on the basis of the invariant moment algorith...

We study numerically the melting of a horizontal layer pure solid above convecting its fluid rotating about vertical axis. In regime studied here, with Rayleigh numbers order $10^7$, convection takes form columnar vortices, number and size which depend upon Ekman Prandtl numbers, as well geometry -- periodic or confined. As vary, average area vortices vary in inverse proportion, becoming thinne...