Assurance of Life Cycle and Torsional Vibrational Pressure for Marine Propeller Shaft

Abstract

This project focuses on evaluating the life cycle and torsional vibrational stresses of a marine propeller shaft for a research vessel, specifically using CK45 steel to handle an engine power of 18,560 kW at a speed of 160 RPM. The analysis involves assessing the performance of a solid shaft under cold static conditions with a closed flange configuration. Key parameters such as the inner and outer diameters, bending stresses, and moments at different shaft sections (aft, intermediate stern, forward, and bearings) are calculated. Torsional vibrations and diameters are determined using marine shafting rules from the Indian Register of Shipping (IRS). Shafting analysis is performed with Nauticus Shaft alignment software and validated with ANSYS. The results indicate that the proposed shaft design can withstand the operational stresses and deflections.