As is well-known, tail shaft alignment is sensitive to small disturbances in the vertical offsets of shaft supporting bearings. A major contributor to the bearing offset on board a vessel in operation is the hull girder deflections resulting from changes in the loading condition of the vessel. Therefore the ability to predict hull deflections with sufficient accuracy is of foremost importance in tail shaft alignment design. In order to achieve this objective, ABS has conducted a series of hull girder deflection measurements on a number of vessels of different types and sizes. Collected data are applied to the ABS Shaft Alignment Optimization software to provide a basis for checking shaft alignment design to assess susceptibility to alignment condition changes during the operations of the vessel.

This content is only available via PDF.
You can access this article if you purchase or spend a download.