THE EFFECT OF WEAR OF STERN BEARINGS AND HYDRODYNAMIC MOMENTS ON STABILITY OF ROTATION OF THE PROPELLER SHAFT
The studying of the effect wears stern tube bearings in ship operation and variable hydrodynamic moment on the stability of rotation of the propeller shaft.Considered the loading of the feed section of the propeller shaft as having a minimum natural frequency. The settlement scheme of the propeller shaft is received in the form of a rod of constant cross section, it is basedon three articulated supports with the console at one end. Supports are modeling the stern tube bearings, single (bearings) and biased due to their wear. The rod is loaded with its own weight of the shaft and propeller and variable hydrodynamic moment. In the study of transverse vibrations of the propeller shaft is taken into account mass and diameter mass moment of inertia of the screw.The investigations showed that the hydrodynamic moment and wear stern tube bearings can significantly affect the stability of the shaft line during operation of the ship. Thus not only affect the amount of wear of bearings, and the ratio between them.Therefore, the hydrodynamic moment and predicted bearing wear must be always taken into account when installing the shafting, and research on the dynamic stability of the shaft rotation to be continued!