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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: Ferdinande, V.
Article Type: Research Article
Abstract: Shock phenomena on a trawler, sailing in rough head seas, are described. An explanation of these shocks is attempted by means of a theory on wedges in the process of being immersed. The values of acceleration peak magnitudes, measured on board by means of an accelerometer in the foreship, are compared with the results of theoretical calculations.
Citation: International Shipbuilding Progress, vol. 15, no. 165, pp. 151-169, 1968
Authors: Janssen, J.H.
Article Type: Research Article
Abstract: In order to calculate exhaust noise spectra (on e.g. bridge wings) a simple mathematical model is given of a large turbo-supercharged marine diesel engine as a source of sound, connected to an exhaust system with or without muffler. The exhaust gas turbines are considered as high internal impedance sound sources. Spectra arc computed with the aid of the Fourier analysis of a periodical trapezium gas flow function in combination with the transfer function of the exhaust system The latter function is determined from scale models. The influences of engine power, number of cylinders, number of revolutions per minute, turbine …nozzle area etc. on the sound pressure level are investigated. Continued research is needed especially on some of the tentative conclusions which indicate for example that a factor 2 increase of the power per cylinder implies an increase of the sound pressure level by 3 dB and moreover that this level is reduced by at least 24 dB if the number of revolutions per minute of the crank-and propeller shaft is reduced by a factor 2. Show more
Citation: International Shipbuilding Progress, vol. 15, no. 165, pp. 170-181, 1968
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