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Design Considerations for Aluminum Hull Structures - Study of Aluminum Bulk Carrier
Final technical rept.
GIBBS AND COX INC NEW YORK
Pagination or Media Count:
The study was undertaken to evaluate the benefits and constraints that will develop when ship design as well as fabrication procedures are modified to employ aluminum alloys instead of steel for hull structure of a large deadweight carrier. The fabrication of a large aluminum hull with state of the art materials and construction techniques is shown to be technically feasible. Present 5000 series alloys have adequate properties, though additional research is required, particularly into fatigue characteristics. Experience to date with existing aluminum ships has been good, though instances of cracking at welds and corrosion have been noted. Criteria for the design of the aluminum hull structure are presented and justified. Methods of fire protection and systemequipment installation are evaluated, and operational characteristics of an aluminum bulk carrier are reviewed. The designs of a large aluminum bulk carrier and an equivalent steel ship are presented and compared. The aluminum ships structure weighs 43 per cent less than the steel ship, and its hull is about 50 per cent more flexible. Cargo deadweight is increased 7-12 per cent.
APPROVED FOR PUBLIC RELEASE