Cost Effective Design of Spar Hull Assembly
Pulakka, Tuomo Edvard (2015)
2015
Konetekniikan koulutusohjelma
Teknisten tieteiden tiedekunta - Faculty of Engineering Sciences
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Hyväksymispäivämäärä
2015-12-09
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201511231749
https://urn.fi/URN:NBN:fi:tty-201511231749
Tiivistelmä
Spar is an oil platform which has a circular cylindrical upper hull and truss and plate structured lower hull. The purpose of the upper hull is to provide buoyancy and lower hull to act as a keel, bringing stability and damping the movements. Spar platforms are used in oil and gas industry in deep waters. Spar platforms are moored and to sea bed. The scope of this thesis is on the upper hull of the platform, which is called the hard tank.
The platform hull is manufactured from a sheet metal using section production methods. One of the components is the center well corner which is located in the hard tank.
This component is a 50-60 mm thick sheet metal bent in a 90° degree angle. Center well cor-ner sheet is a very rigid and expensive component. The high rigidity of the component results to extensive fitting operations during manufacturing. The current design is a re-sult of high strength and fatigue resistance requirements.
This thesis is a documentation of the process, the purpose of which was to reach more cost efficient structural solution. Alternative solutions were required to fulfill strength and fatigue criteria. Some areas of interest were named for further development.
The platform hull is manufactured from a sheet metal using section production methods. One of the components is the center well corner which is located in the hard tank.
This component is a 50-60 mm thick sheet metal bent in a 90° degree angle. Center well cor-ner sheet is a very rigid and expensive component. The high rigidity of the component results to extensive fitting operations during manufacturing. The current design is a re-sult of high strength and fatigue resistance requirements.
This thesis is a documentation of the process, the purpose of which was to reach more cost efficient structural solution. Alternative solutions were required to fulfill strength and fatigue criteria. Some areas of interest were named for further development.