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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year two issues appear (in March and September). 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: Said Ahmed, M.H.
Article Type: Research Article
Abstract: In this paper the author used the circulation function obtained by Theodorsen in designing a homogeneous flow and a wake-adapted flow marine screw propellers, to show how far it can fit with the current trends of marine screw calculations. Numerical examples are given and comparison with other methods are shown.
Citation: International Shipbuilding Progress, vol. 12, no. 126, pp. 59-76, 1965
Authors: van Leeuvven, G.
Article Type: Research Article
Abstract: For a practical range of circular frequencies forced sway and yaw tests were carried out, to obtain the values of mass and damping and their linear cross-coupling effects. Cross-coupling damping effects are considerable, but the apparent mass centre of gravity appeared to be located close to the model’s centre of gravity. In general the results agree with those of Paulling . The influence of the rudder and the propeller in the low frequency range is shown clearly, except the influence on the moment of inertia coefficients. The results of the combined sway and yaw tests in general agree …with the comparable pure motion results. The differences found will partly be caused by higher order cross-coupling effects, partly by the possible error of the test data. It seems that even for higher frequencies linear equations of motion may be applied. As a secondary result the stability indices could be determined from the obtained values of the various coefficients. For a restricted frequency range negative stability was found. This result may be related to the critical state of the wave pattern generated by the oscillating model. Show more
Citation: International Shipbuilding Progress, vol. 12, no. 126, pp. 77-97, 1965
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