Breadcrumb

 
 

Torsional-axial coupling in the line shafting vibrations in merchant ocean going ships

Title:

Torsional-axial coupling in the line shafting vibrations in merchant ocean going ships

Šverko, Davor (1997) Torsional-axial coupling in the line shafting vibrations in merchant ocean going ships. Masters thesis, Concordia University.

[img]
Preview
PDF
6Mb

Abstract

Mutual interaction of the two major vibration modes, i.e. torsional and axial, resulting from propeller action in the solid elastic shaft of the merchant ocean going ships is analyzed in this thesis. This type of vibration interaction can be described as torsionally-induced propeller thrust fluctuation. Generated longitudinal vibrations due to the thrust variation, can be the cause of excessive ship hull vibrations in modern merchant ocean going ships. The aim of this study is twofold; i.e. to show how the design of the propulsion line shafting affects the coupling phenomenon between torsional and axial vibrations, and to correlate line shafting design with potential structural problems of the hull. The line shafting design is first addressed using conventional approach which yields information about torsional and axial eigenvalues and stresses. It provides no details regarding propeller coupling. The method used in the analysis is transfer matrix method, which suits well the rotor systems on modern ocean going ships. Vibration coupling computation is then performed using finite element method to demonstrate the importance of obtaining torsionally induced axial force. It is shown that dynamic response of the ship hull will be greatly affected by longitudinal force generated by propeller coupling of torsional and axial vibrations.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Thesis (Masters)
Authors:Šverko, Davor
Pagination:xxvi, 264 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:Theses (M.A.Sc.)
Program:Mechanical and Industrial Engineering
Date:1997
Thesis Supervisor(s):Bhat, Rama B.
ID Code:505
Deposited By:Concordia University Libraries
Deposited On:27 Aug 2009 13:12
Last Modified:08 Dec 2010 10:15
Related URLs:
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Document Downloads

More statistics for this item...

Concordia University - Footer