Change search
ReferencesLink to record
Permanent link

Direct link
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Underwater Technology.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This report is a master thesis performed at The Royal Institute of Technology divisions of Lightweight Structures and Naval Architecture in collaboration with the Swedish defence material administration, FMV. There are several naval submarines used by the Swedish navy and more to be built. The existing submarines have stability problems due to a high centre of gravity. Most parts on the existing vessels are made of steel, despite a position far above the vertical centre of gravity. By replacing the current steel casing covering the top part of the submarines pressure hull and the rudders placed on the tower, to a lighter composite structure it is possible to lower the centre of gravity. In this report the composite structure of the rudder and the casing has been weight optimized to achieve a structure as light as possible, but still able to withstand the forces applied to the structure. An analysis of the applied loads shows that the dimensioning loads vary between 50 and 90 kPa depending on the specified part. The results show that it is possible to decrease the weight of the rudder and casing with over 80 %. This would also give the submarine an increase in initial stability with over 40 % compared to the existing steel construction.

Place, publisher, year, edition, pages
2013. , 48 p.
TRITA-AVE, ISSN 1651-7660 ; 2013:43
National Category
Vehicle Engineering
URN: urn:nbn:se:kth:diva-149347OAI: diva2:739299
Available from: 2014-08-20 Created: 2014-08-20 Last updated: 2014-08-20Bibliographically approved

Open Access in DiVA

fulltext(2273 kB)145 downloads
File information
File name FULLTEXT01.pdfFile size 2273 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Lightweight StructuresUnderwater Technology
Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 145 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 145 hits
ReferencesLink to record
Permanent link

Direct link