Calculations for finding limit conditions in shipboard machinery installation

Abstract

This master thesis presents the noise assessment of the structure of the engine room of a cruise ship. The structure under analysis is made up of two decks, double bottom, double side and one bulkhead and different pillars connecting both decks. The study is performed using an empirical method and the finite element method. This investigation is carried out because of the necessity to find limit conditions in shipboard machinery installation during the design phase since fixing noise-related issues after construction is expensive and difficult to address. The empirical method provides a fast check of the noise assessment. However, this method presents some limitations which could provide wrong results if the method is applied out of range. The results from the finite element analysis allow to identify these limitations and correct the results. The detailed elaboration of the finite element model (type of model, geometry, meshing, loading cases) is a fundamental aspect of this thesis.