Extension and Application of Ship Design Optimization Code (Shipdoc)

Richardson, William M.; White, William J.

doi:10.1111/j.1559-3584.1984.tb01827.x

Cited by 4 publications

(2 citation statements)

References 3 publications

(2 reference statements)

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“…Research conducted by the David Taylor Research Center (DTRC) was made available in the form of the SHIPDOC computer program and the SESDOC data base. For a description of SHIP-DOC, see [3].…”

Section: Sfs Designmentioning

confidence: 99%

SFS — The 55 Knot Sealift Ship

Bowden¹,

Embry

1989

Naval Engineers Journal

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SFS is the acronym for the Surface Effect Fast Sealift Ship, a 20,000‐ton, surface effect ship (SES). The SFS acronym was chosen to distinguish it from the smaller, 100‐6,000 ton, SES craft. The paper is based on an Ingails Shipbuilding conceptual design and concludes that an SFS is buildable now using existing technology. The waterjet propulsion system and the seal development program are also discussed. Immediate application to the Army's sealift requirements, the possible alternative military sealift and commercial applications, and the application of SFS technology to future military and commercial ship design are examined. The SFS is designed to carry U.S. Army unit equipment such as tanks, trucks, and helicopters in a roll on/roll off configuration. The vessel must carry a 5,000 short ton payload over a range of 3,500 miles in sea state 3 at 100% full power at an average speed of 55 knots. The maximum cushionborne draft is ten feet and the SFS must be capable of loading and unloading while on cushion to permit operating in shallow draft ports. The original conceptual design was 825 feet long, 150 feet wide, and 84 feet high. It had 240,000 bhp of propulsion power and 60,000 bhp of lift power. The present configuration is slightly larger and has over 200,000 square feet of usable payload deck space. The parametric studies leading to the selection of the hull form and proportions are discussed. The logic used in the selection of the waterjet/gas turbine propulsion system is reviewed. The philosophy of the arrangements, the propulsion system, the lift air system, the fuel system, the ballast system, and the ventilation system are also addressed. The paper identifies the differences between the SFS operational profile and that of conventional ships. The payloadrange‐speed‐fuel relationships are explored and similarities with aircraft explained. The Army's need for a fast sealift ship is discussed. Features have been added by Mod II, which extend the design beyond the single Army mission concept and make it a truly versatile fast sealift ship which can perform virtually any known sealift mission.

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Section: Sfs Designmentioning

confidence: 99%

SFS — The 55 Knot Sealift Ship

Bowden¹,

Embry

1989

Naval Engineers Journal

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“…This comparison is made by specifying that the reliability of the ship or of a particular subsystem, such as the structure, be the same for all the candidate ship types or variants proposed for a given mission. The effect of specified changes in reliability upon total ship size and weight may be evaluated by using nonlinear optimization programs such as SHIPDOC [39], which, since it uses the ship description as data to the optimization, may be used to evaluate any ship type.…”

Section: Structuresmentioning

confidence: 99%

The Surface Effect Ship

Butler

1985

Naval Engineers Journal

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A Probability Based Load Estimation Technique for Ship Structure Design and Technology Evaluation

Richardson¹

1987

Naval Engineers Journal

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Rationales for using reliability based techniques for technology evaluation and design are presented. The use of a method for estimating lifetime loads, applicable to any ship type, is presented using primary structural load estimation as an example. The sequence leading from model design considerations and testing through the formulation of structural criteria is explained and illustrated using SES examples. The principal emphasis is upon overall or global loads although the method can be applied to local loads. The method provides a means of quantifying load differences due to variations in a commonly used structural load probability distribution, mission requirements, operating environment, vessel lifetime, and service life reliability. An example showing the effect upon displacement for changes in primary load exceedence is shown. The method of load estimation used here, once experimental (or theoretical) data are available, is shown to be no more difficult to apply than currently used deterministic methods, thus allowing quantitative estimates of certain technology changes to be made quickly.

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Extension and Application of Ship Design Optimization Code (Shipdoc)

Cited by 4 publications

References 3 publications

SFS — The 55 Knot Sealift Ship

SFS — The 55 Knot Sealift Ship

The Surface Effect Ship

A Probability Based Load Estimation Technique for Ship Structure Design and Technology Evaluation

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