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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: Leopold, Reuven
Article Type: Research Article
Abstract: Straking means the subdivision of large areas of uniform scantling into smaller pieces of obtainable size. This paper develops a general purpose algorithm for generating the plate pieces which can be cut from standard size plates ordered from a steel mill. The algorithm uses contract plans information and generates, as a final result, fabrication data. The algorithm is subject to various constraints, such as: 1. Avoiding the placing of seams or butts too close to various interfering members on bulkheads, decks, etc. 2. Avoiding the placement of butts or seams on openings in an arbitrary orientation. …The criterion of optimality used in the algorithm is minimum overall cost (production, planning and assembly) which is expressed in terms of: 1. Minimizing the number of different plate sizes ordered; 2. Minimizing the amount of scrap; 3. Minimizing the amount of welding. A unique method of automatic nesting is also described. The straking part of the algorithm has been programmed for a digital computer and tests show that the results save time, increase accuracy and reduce cost. Show more
Citation: International Shipbuilding Progress, vol. 15, no. 166, pp. 185-205, 1968
Authors: Oosterveld, M.W.C.
Article Type: Research Article
Abstract: This paper presents the results of open-water tests and observation of the cavitation characteristics of systematic series of flow decelerating nozzles (or pumpjets). The tested nozzle shapes have been derived theoretically. The results of these theoretical calculations and of the experiments are presented in a nondimensional form in graphs. A discussion of the results is given.
Citation: International Shipbuilding Progress, vol. 15, no. 166, pp. 206-220, 1968
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