Preskriptiva lösningar för fiberarmerad polymerkompositer i handelsfartyg: En Litteraturstudie
Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
In todays possibilities in using alternative material designs in the construction of ships there is a need for prescriptive regulations. Therefore this thesis was initiated to develop a draft on a part of a prescriptive regulation for Fiber Reinforced Polymers (FRP) on SOLAS – ships and to design simple but general regulations to avoid extensive Regulation – 17 analyses when making novel constructions.In “Safety of Life at Sea” (SOLAS) ships, all load bearing structures and A-class divisions must be constructed in steel or equivalent materials. With support of “Regulation – 17” an alternative material configuration can be approved if a risk assessment demonstrates that an equivalent safety is present. However a “Regulation 17 – analysis” tends to be quite extensive and is generally infeasible, therefore a smaller selective regulation is needed in each ships construction.The development of these new regulations was initiated by a literature study. Knowledge gained from this study paired with conclusions and experiences from earlier research studies and Regulation – 17 analyses were used to develop a draft for new regulations.In commercial ships, SOLAS class structural interchanges can be noted as follows: “A ” class divisions can be replaced by Fire Resisting Divisions – 60 minutes, further addressed as FRD – 60, if consisting of Fiber Reinforced Polymer structures with thermal insulation comparable to the “A” – class.“B” class divisions and lower requirements can be replaced by FRD – 30 minutes, further addressed as FRD – 30, if consisting of Fiber Reinforced Polymer structures with thermal insulation comparable to the “B” - class.At points of Joint between FRP constructions and Steel constructions the thermal conductivity must be analyzed so that a loss of time in fire resistance does not occur, due to the thermal conductivity of steel. These standards shall be to the satisfaction of the Administrations.Commercial passenger ships constructed mainly by Fiber Reinforced Polymers shall not have a traveling route more than 4 hours at 90 % of maximum speed from the coastline. The previously tested divisions FRD30 – 60 have been tested and created through previous Regulation – 17 analyses which this thesis has exploited in the development of prescriptive Regulations in alternative materials such as Fiber Reinforced Polymers. The division FRD – 240 is created in this thesis to enable the replacement of the most important parts of the ship for its survival at a point of imminent fire emergency, such as the superstructures, deckhouses and bulkheads.Finally, these prescriptive regulations for alternative material will develop a ship with combinations of steel and alternative materials. These joints, “hotspots”, must be thoroughly analyzed at the creation of the ship to avoid propagation of fire due to steels high thermal conductivity. When using FRD – 240 divisions these ships shall not exceed a distance from the coastline of more that 240 minutes. This distance shall be reached by definition of the vessel at 90 % of maximum speed. The proposal of a 4-hour distance from land should be reviewed and specified for different ship types.At this point of developing new regulations, the machinery spaces regarding crowns, casings and floor plating are not addressed. However, in the future these constructions should be questioned and reviewed.Reevaluation of the demands of non-combustible materials in the ships classifications must be performed.
Place, publisher, year, edition, pages
2016. , 40 p.
Teknik, SOLAS, FRD 30, FRD 60, FRD 240, Regulation 17, Alternative design
IdentifiersURN: urn:nbn:se:ltu:diva-50866Local ID: 81543e0e-bf74-4198-a0e5-1538f3071ae1OAI: oai:DiVA.org:ltu-50866DiVA: diva2:1024229
Subject / course
Student thesis, at least 15 credits
Fire Protection Engineer, bachelor's level
Validerat; 20160206 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved