Study of Effective Parameters in Stability and Vibration of Marine Propulsion Shafting Systems

Abstract

The marine propulsion system is a system that a ship depends on in travelling and maneuvering in the existence of different types of waves, which reduce the efficiency of the system. In this work, different types of vibration such as torsional, lateral and longitudinal and their effect on ship and propulsion system are studied. Vibration seriously threatens the reliability and safety of the ship. The finite element method is established to study vibration at different rotational speeds. In this work vibration, analysis and modeling with simulation for cases of lateral and torsional vibration are performed by using MatLab software. In addition, ANSYS 2019 R3 is used to study some cases of marine propulsion system. In this work, effective parameters that play important role in vibration reduction such as the diameter, stiffness, couple unbalance and mass unbalance are discussed. The results of that analysis provided can help to predict the problems. In general, to achieve better stability and safety, all the conditions of the propulsion system must be taken into account to diagnose the problem. Hence, the data which are provided in diagrams and tables can be used as a guide in the design stage or maintenance stage to treat system problem and then take the proper action.