-Ship Design Process DOCX

Title	-Ship Design Process
Author	Joseph Afful
Pages	1
File Size	3.5 MB
File Type	DOCX
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Summary

NOTES AND SKETCHES IN NAVAL ARCHTECTURE 21–SHIP DESIGN PROCESS 21.1 INTRODUCTION Ships unlike most other transport vehicles are not off the shelf products. They are complex vehicles for which design is not done in technical isolation but rather consideration is given to the overall system in which i...

Description

NOTES AND SKETCHES IN NAVAL ARCHTECTURE 21–SHIP DESIGN PROCESS 21.1 INTRODUCTION Ships unlike most other transport vehicles are not of the shell prooucts. They are complex vehicles lor which oesign is not oone in technical isolation but rather consioeration is given to the overall system in which it is to operate. Every ship or group ol ships is therelore oesigneo ano constructeo lor a specifc purpose or traoe (Custom maoe). In ooing so however it pays to put in some amount ol fexibility il possible to allow lor aoaptation as oemano changes. 21.1.1 Contract Specifcations or Design Requirements Determining a ship's lorm ano oimensions begins with requirements specifeo by the owner. These incluoe the lollowing: Type ol vessel: o Gooos the ship will carry. Will she be a tanker, lor ory cargo or passengers? o Il lor ory cargo will she be a tramp vessel or lor liner service? Will she be general cargo or a container ship? o Il lor passengers will she be a lerry or cruise liner? Deaoweight: o Quantities that will be transporteo economically. The higher the oeaoweight coefcient the higher the cargo carrying capacity ano hence the proft margin. o For the unoerlisteo ship types oeaoweight is infuenceo by the lollowing: For Container ships - number ol twenty-loot equivalent units (TEUs) to be carrieo. For Ro-Ro vessels – lanes in metres (LIM) to be provioeo. For Car carriers – car equivalent units (CEUs) to be provioeo. For passenger vessels – ration ol gross tonnage/passenger (Passenger/Space Ratio). Service speeo: o Rate at which the vessel shall be calling at ports or will make oelivery ol gooos carrieo. This infuences the propulsion machinery selection that will give the best luel consumption when in operation. Routes: On the basis ol routes to be traoeo ano ports at which the vessel will call, the lollowing will then be lactoreo into the oesign: o Length, breaoth ano oraught restrictions in ports, canals ano locks. o Air oraught limitations il vessel will be passing unoer brioges. JN Mante (2015)...