PROPELLER INDUCED STRUCTURAL VIBRATION THROUGH THE THRUST BEARING

Abstract

Propeller induced structural vibration through the thrust bearing is an important source for low frequency shipboard noise and underwater sound radiation from a submarine hull. Such vibration is investigated using a scaled experimental model. This research concentrates on the experimental characterization of propeller force, hydrodynamic force of the thrust bearing and vibration transmission through a thrust bearing into the supporting structure. The results of laboratory measurement of the propeller force and the complex hydrodynamic stiffness of the thrust bearing are presented in this paper. The response of the shaft axial vibration and flexural vibration of the supporting structure is also analyzed.