COMPUTATIONAL-EXPERIMENTAL EVALUATION OF STIFFNESS IN A SYSTEM SHAFT-BEARING SUPPORTS OF A SUPERCHARGER AIR COMPRESSOR

Combined computational and experimental method has been applied to determine stiffness of shaft and bearing supports in a turbocharger. The method suggests parallel analysis of stress-strain state of the studied object by computer simulation and experimental measurements. The stiffness parameters of elastic supports are varied throughout the analysis. The compared quantities are the displacements at control points on the shaft and in the bearings. This results in a complete set of parameters for the model. The rotation angle of rollers in the bearings has been varied as well. The dependence of shaft deflections and displacements in the elastic supports on this parameter have been evaluated. It has been established that the elastic displacement of the cantilever end of the shaft is smaller than the displacements in the bearing supports.