Practical Source Code for Ship Motions Time Domain Numerical Analysis and Its Mobile Device Application

Examensarbete för masterexamen

Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12380/162658
Download file(s):
File Description SizeFormat 
162658.pdfFulltext3.52 MBAdobe PDFView/Open
Type: Examensarbete för masterexamen
Master Thesis
Title: Practical Source Code for Ship Motions Time Domain Numerical Analysis and Its Mobile Device Application
Authors: Thein, Zayar
Abstract: This thesis included developing MATLAB program source code for the six degrees of rigid body freedom time domain motions of a ship travelling with a specified mean velocity in waves. The code is developed to simulate canonical forced and free motions. This study followed the impulse-response function time domain method in which the hydrodynamic coefficients are computed using the 2-D linear strip method in the frequency domain and converted into the time domain. The equations of motion are then solved simultaneously. This study considers merchant ships except for ships with a buttock flow stern. Ikeda’s prediction is used for roll damping computation, and a good solution is achieved for vessels other than buttock flow stern ships in roll motion. A range of wave periods and speeds are also considered. Steady-state results are compared to other published results. The numerical method agrees with classical ship motions and published results. The present work explores ways to simulate ship motion in mobile devices. Two concepts are proposed: web-based simulation (WBS) and a stand-alone simulation. The latter approach is adopted. Two parts of the source codes are rewritten for the iOS platform: the motion related to memory forces and the calculation engine. The codes are tested in the iOS simulator, and the results are compared with the MATLAB solution. The world’s first mobile device application in naval architecture achieves a good simulation result.
Keywords: Farkostteknik;Transport;Vehicle Engineering;Transport
Issue Date: 2012
Publisher: Chalmers tekniska högskola / Institutionen för sjöfart och marin teknik
Chalmers University of Technology / Department of Shipping and Marine Technology
Series/Report no.: Report. X - Department of Shipping and Marine Technology, Chalmers University of Technology, Göteborg, Sweden : 273
URI: https://hdl.handle.net/20.500.12380/162658
Collection:Examensarbeten för masterexamen // Master Theses



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.