A first principle approach for the strength analysis of a semi-swath vessel

Structural strength is an important factor for a Semi-Small Water-plane Area Twin Hull (Semi-SWATH). A Semi-SWATH ship is a combination of the Small Water-plane Area Twin Hull (SWATH) ship in the forward half and conventional catamaran in the stern half. Due to the twin hull design, strength analysi...

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Main Author:	Ahmad, Shaharudin
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/54852/1/ShaharudinAhmadPFKM2015.pdf
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id	my-utm-ep.54852
record_format	uketd_dc
spelling	my-utm-ep.548522020-11-09T06:09:06Z A first principle approach for the strength analysis of a semi-swath vessel 2015-07 Ahmad, Shaharudin TJ Mechanical engineering and machinery Structural strength is an important factor for a Semi-Small Water-plane Area Twin Hull (Semi-SWATH). A Semi-SWATH ship is a combination of the Small Water-plane Area Twin Hull (SWATH) ship in the forward half and conventional catamaran in the stern half. Due to the twin hull design, strength analysis is most important, especially in transverse direction to prevent structural failure in the cross deck between two hulls. In this research, a First Principle approach using modified formula for strength analysis of a semi-SWATH structure was developed. The approach focussed on evaluations of the longitudinal and transverse strengths of the Semi-SWATH bulkhead. Predictions using this First Principle approach are mostly catered for failures and high stress concentrations especially at the transverse structures that connect the twin hulls. To verify the results, a 1:10th scale model of the Semi-SWATH was tested in the National Hydraulic Research Institute of Malaysia (NAHRIM) tank facilities. Data Acquisition System (DAS) was also developed to capture the strength data of semi-SWATH vessel structure by using strain gauges. Data collected from DAS were customized by using LabView software through SCXI signal conditioning. The experiment results were used to verify the results of static and wave impact in head seas on the compartment’s beam structures. It was found for the case of plating failure, the First Principle approach predicted stress values of 52.6% and 15.34% higher as compared to experiment and Finite Element Method (FEM) respectively. The results are significant on ship structure analysis as reported by Ship Structure Committee SSC, which was in the range of capacity design value of the bulkhead compartment structure. 2015-07 Thesis http://eprints.utm.my/id/eprint/54852/ http://eprints.utm.my/id/eprint/54852/1/ShaharudinAhmadPFKM2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:88018 phd doctoral Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ahmad, Shaharudin A first principle approach for the strength analysis of a semi-swath vessel
description	Structural strength is an important factor for a Semi-Small Water-plane Area Twin Hull (Semi-SWATH). A Semi-SWATH ship is a combination of the Small Water-plane Area Twin Hull (SWATH) ship in the forward half and conventional catamaran in the stern half. Due to the twin hull design, strength analysis is most important, especially in transverse direction to prevent structural failure in the cross deck between two hulls. In this research, a First Principle approach using modified formula for strength analysis of a semi-SWATH structure was developed. The approach focussed on evaluations of the longitudinal and transverse strengths of the Semi-SWATH bulkhead. Predictions using this First Principle approach are mostly catered for failures and high stress concentrations especially at the transverse structures that connect the twin hulls. To verify the results, a 1:10th scale model of the Semi-SWATH was tested in the National Hydraulic Research Institute of Malaysia (NAHRIM) tank facilities. Data Acquisition System (DAS) was also developed to capture the strength data of semi-SWATH vessel structure by using strain gauges. Data collected from DAS were customized by using LabView software through SCXI signal conditioning. The experiment results were used to verify the results of static and wave impact in head seas on the compartment’s beam structures. It was found for the case of plating failure, the First Principle approach predicted stress values of 52.6% and 15.34% higher as compared to experiment and Finite Element Method (FEM) respectively. The results are significant on ship structure analysis as reported by Ship Structure Committee SSC, which was in the range of capacity design value of the bulkhead compartment structure.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ahmad, Shaharudin
author_facet	Ahmad, Shaharudin
author_sort	Ahmad, Shaharudin
title	A first principle approach for the strength analysis of a semi-swath vessel
title_short	A first principle approach for the strength analysis of a semi-swath vessel
title_full	A first principle approach for the strength analysis of a semi-swath vessel
title_fullStr	A first principle approach for the strength analysis of a semi-swath vessel
title_full_unstemmed	A first principle approach for the strength analysis of a semi-swath vessel
title_sort	first principle approach for the strength analysis of a semi-swath vessel
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/54852/1/ShaharudinAhmadPFKM2015.pdf
_version_	1747817741453099008

A first principle approach for the strength analysis of a semi-swath vessel

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