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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:
- Concept development
- General design of ships and offshore objects
- Ship and offshore structural design
- Hydro-mechanics and -dynamics
- Maritime engineering and machinery systems
- Production processes of all types of ships and other objects intended for marine use
- Production technology and material science
- Shipping science, economics, and all directly related subjects
- Ship operations
- Offshore and ocean engineering in relation to the marine environment
- Marine safety
- Efficiency, lifecycle, and environment
- Ice-related aspects for ships and offshore objects.
The contents of the papers may be of a fundamental or of an applied scientific nature and must be of the highest novelty and rigor.
Authors: Moe, Johannes
Article Type: Research Article
Abstract: The sequential unconstrained minimization technique (SUMT)  has been used rather extensively in conjunction with cost and weight minimization of ship structures. In practical design problems the number of free variables easily becomes high and the structural analyses may also become complex. and time consuming. Large computer times are a consequence. This paper discusses various methods by which the required number of redesigns during the search for optimum as well as the computer work involved in each such redesign may be reduced. Approximate behaviour and constraint models in terms of simple polynomials have been used with considerable success and …may be combined with an extrapolation technique that allows one to reduce significantly the number of response surfaces. In this manner the required computer time may be reduced to only a fraction of that previously experienced. A few examples of typical applications to practical ship design problems are presented, viz.: a. Minimum cost design of a typical tank section of an oil-tanker. b. Minimum cost design of the midship section of a car-carrier. c. Minimum weight design of grillages and transverse frames of tankers. The tanker design program is presently used as a preliminary design tool in one of the major Norwegian shipyards. It produces designs which comply with the rules of the Norwegian Ship Classification Society. A detailed cost model has been developed in close cooperation with the shipyard. Minimum cost design of a typical tank section of an oil-tanker. Minimum cost design of the midship section of a car-carrier. Minimum weight design of grillages and transverse frames of tankers. Show more
Citation: International Shipbuilding Progress, vol. 17, no. 187, pp. 69-86, 1970
Authors: Huse, E.
Article Type: Research Article
Abstract: The paper presents a theoretical and experimental investigation of the influence of hull vibrations upon the accuracy of experimental determination of propeller-induced pressure fluctuations. The results indicate that in many cases it will be impossible to measure propeller-induced pressure fluctuations on the afterbody of a ship by means of pressure transducers fitted in the hull plates.
Citation: International Shipbuilding Progress, vol. 17, no. 187, pp. 87-95, 1970
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