COMPUTER APPLICATION FOR SHAFT ALIGNMENT DESIGN

摘要

The propulsion shafting operates at the junction of different media where the interacting conditions change constantly depending on the ship draught, engine speed, ambient and machinery temperature. Once installed on the flexible hull structures it is exposed to hydrodynamic propeller loads, variable contact conditions within the continuous hydrodynamically lubricated elastic bearings. It is obvious that the proper decision concerning of initial linear and angular bearing offsets setting can be made with the help of the computer application only. This paper describes the approach of the computer application based on the most realistic model of the propulsion shafting operation. The procedures for the hull deflections estimation and the propeller hydrodynamic loads calculation are discussed. The special attention is paid to the methods for searching of the optimal linear and angular bearing offsets. Also it is shown that the application of the universal reverse analyses procedure is inevitable for the ships under repair or under renovation.