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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.
Article Type: Research Article
Abstract: In this paper, flow around two-dimensional bodies moving with a constant speed beneath a flee surface is studied. Formulation of the problem is given briefly and a Green function is used to reduce the problem to a Fredholm integral equation. The integral equation is then solved by higher order source distribution by employing B-splines. Numerical results are presented and the advantages of the method are discussed.
Citation: International Shipbuilding Progress, vol. 32, no. 372, pp. 182-187, 1985
Article Type: Research Article
Abstract: This paper briefly outlines the methodology normally adopted by the authors to assess the noise levels of a Motor Yacht during the preliminary design stage. The procedure is based on measurements carried out on board similar yachts and enables the determination of noise levels in the main accommodations, the engineroom, the wheelhouse, etc. This paper gives an example of the method for predicting noise levels for a 75 ton GRP (Glass Reinforced Plastic) Motor Yacht, 30.8 m long, 2 x 1440 kW MTU diesel engines, driving two 11 degrees inclined shaftlines at 2100 RPM. Cruising speed is 28 knots. …To ascertain that noise levels were met, vibration and noise tests were carried out on board by a Classification Society. Its results, along with other additional figures obtained by the authors during further tests, are here reported in detail. The scope of these additional measurements was to check whether predicted noise levels agreed with measured values. A high vibration level was however recorded at the transom stern structure, definitely due to propeller excitation, which propeller was designed according to the best efficiency criterion. In order to lower the stem vibration level a new propeller was designed and installed. Its design, theoretical verification and performance predictions are illustrated in the paper. Show more
Citation: International Shipbuilding Progress, vol. 32, no. 372, pp. 188-201, 1985
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