Vibration Characteristics Analysis and Optimization of Trawler Propulsion Shafting System

Abstract

The propulsion shafting system enables power delivery from the main engine to the propeller and plays a vital role in promoting the motion of the ship. The increase in demand for trawlers in coastal areas has led to the increase in the need for an improvement in its performance. Therefore, while trawling at sea, vibration characteristics are essential in analyzing for the safe and efficient functioning of the propulsion shafting of trawler ship. The primary objective of this paper is to model, analyze and reduce the vibration characteristics of trawler propulsion shafting. A computational model has been modeled and analyzed by Modal Analysis using Finite Element Method, focusing on the Lateral Vibrations. The natural frequencies, mode shapes, and the maximum deformation with affected zones of trawler propulsion shafting are evaluated. The attempt has been made to reduce the vibration characteristics of trawler propulsion shafting by the optimization process considering the design parameters whereby, it comes in the acceptable range for normal operation. The results of analysis and optimization have been computed and discussed.