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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:
The contents may be of a pure scientific or of an applied scientific nature.
Authors: Muntjewerf, J.J.
Article Type: Research Article
Abstract: The research published in this paper was carried out on behalf of the Bureau of Ships of the Royal Netherlands Navy, with the object of studying the behaviour of the destroyer-types in a fully developed wind-sea at wind-force Beaufort 6 and further of evaluating the Lewis-semi-submerged shipform under such circumstances.
Citation: International Shipbuilding Progress, vol. 10, no. 102, pp. 37-52, 1963
Authors: Yoshiki, Masao
Article Type: Research Article
Abstract: This lecture first presents an outline of research work by which many troublesome problems in the design and construction of large tankers were solved, and secondly introduces the largest tanker ever built in Japan, the Nissbo Maru , of 130,000 deadweight tonnage. With regard to design of such tankers, two points, that is, (1) reduction in length of ship (L), and (2) increase in depth (D), should be taken into account from the standpoint of weight saving and of easy fabrication. Researches into structural problems of tank parts and into the dynamic pressure of cargo …oil tank, due to ship motions, are described briefly, and show that the maximum impulsive pressure in model tests may be up to 5 times the static fluid pressure and may be observed at the tank top when the natural period of fluid in the tank is resonant with the oscillation period of the ship. Special care should be taken in the detailed design of longitudinals, struts and so on, otherwise cracks will initiate easily at the point of stress concentration. As regards hull construction practices in such large tankers, there seem to be no special problems except in the fabrication and welding of very thick plate of up to 50 mm thickness. Very thick plates thus offer several problems to be solved such as groove shapes, application of “Unionmelt”, doubling plate, weld cracking, and back-wave welding technique, etc. Brief discussion and some test results on these problems are included and mention is made of the superiority of KZ-type groove for automatic single-pass submerged-arc welding and of “Uranami” Welding electrode (which offers a perfect one-side welding without backing plate). Finally, construction methods for large tankers are briefly introduced to give an idea of the hull construction of such large tankers in the building berth. Show more
Citation: International Shipbuilding Progress, vol. 10, no. 102, pp. 53-70, 1963
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