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Article type: Cover
Pages
Cover1-
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Article type: Cover
Pages
Cover2-
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Mikio KUTSUKI, Masaaki KANAYAMA
Article type: Article
Pages
1-9
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Modern developments in plate cutting for shipbuilding have been achieved by such automatic contour flame cutting machines as Monopol, Logaton, Eagle, Unigraph, etc. However, these machines can not mark off and also their capacities are limited by the gas cutting speed. Accordingly, they are not highly efficient in productivity. The optical marking method has been already put into practical use, but it needs hand tracing of the image projected. This paper describes about the E.P.M. process which prints markings directly on metal plate surface by full size, and can make up for the defects of the conventional process. The E.P.M. which had never been developed before in the world, is a new method of electrostatic photography to metal plates. Above all, another feature is that the sensitive material of the E.P.M. serves itself as primer paint for anti-corrosion.
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Hiroshi TANAKA
Article type: Article
Pages
10-18
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Because of the lower Young's modulus of fiber-reinforced plastics (F.R.P.), it seems necessary to pay various considerations to cope with such property for designers to apply this material as the strength members of structures. For the purpose of obtaining basic data in this regard, the author has executed some experiments as follows ; (1) Bending tests of stiffeners with various types of connections, (2) Hydraulic pressure tests of stiffened panels. In the former tests, the condition of destruction of connecting part was examined on a total of eight kinds of models, while, in the latter, hydraulic pressure tests were carried out on eight kinds of stiffened panels of 1,500mm×1,500mm.
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Hiroshi TANAKA
Article type: Article
Pages
19-22
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Some fundamental study on thermal insulation was carried out for the structures of which walls and ceilings were made by plastic material. The thermal transmittance were measured by a specially designed apparatus on several kinds of test models, some of which were constructed by the plastic material and the others by that in common use.
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Hideo TANAKA, Kazuo IMEZAKI, Kunio TERADA
Article type: Article
Pages
23-30
Published: February 29, 1964
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In order to study the behaviour of stiffened panels beyond the elastic limit, widely used in ship structure as shell platings and bulkhead platings, we projected some experiments in the following. Considering interaction between stiffeners and plate, systematic pressure tests were done by series changing stiffener's size and space of small models having the loaded area of 470mm×940mm.
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Akisuke URATA
Article type: Article
Pages
31-38
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Generally, a large tanker has two or three longitudinal bulkheads running through almost all the length of hull. And it is well known that these bulkheads are almost fully effective as web members of hull girder with respect to the longitudinal strength in the middle part of the length. However, the experimental results on actual tankers obtained by Dr. Kinoshita and Dr. Nishimaki show that the patterns of the stress distribution in the vicinity of the fore and aft ends of the bulkhead are far differ from those calculated by the beam theory. This should be due to the shear-lag effect at the end part of the plate. In this paper, the theoretical studies with regards to the stress distribution of the longitudinal bulkhead with various end conditions are described. The theory used in this paper was established by referring to Prof. Yamakoshi's theory on the stress distribution of ship's superstructure. The main results obtained are as follows ; (1) The shear-lag phenomenon in the longitudinal bulkhead is independent of it's thickness and length. (2) The shear-lag effect is remarkable only within the range approximately equal to 1.2 times the depth of the longitudinal bulkhead from it's end. The remaining middle portion is fully effective on the longitudinal bending of hull structure and the distribution of the bending stresses in the longitudinal bulkhead in this region can be obtained by using the beam theory. (3) The effect of the end bracket is remarkable, but the effect of the transverse bulkhead of usual flexible rigidity is negligibly small.
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Takashi MATSUNAGA, Akira ADACHI, Katsuyuki NAGAO, Ryoichi TAMARU
Article type: Article
Pages
39-47
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Crude oils generally have low flash points and then some pre-treatment is necessary to use them as ship fuel. We have conducted intensive researches into the possible method obtaining such treated oils that meet the Lloyd's and other requirements. From the experiment of steam-distillation of the crude oils, the following results have been obtained : 1. By blowing steam into the crude oil and extracting out low flash point elements contained in it, the flash point of crude oil can be elevated easily and promptly. 2. By properly adjusting the amount of steam blown and the time of treatment, the treated oil having a predetermined flash point over the range of 0〜80℃ can be obtained. 3. The Seria treated oil has physical properties analogous to A heavy oil, and Kuwait treated oil to B heavy oil, and both are assumed to be usable as high-quality fuel oils for boilers and diesel engines.
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Fukuo SHIBATA
Article type: Article
Pages
48-55
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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Recently, steam turbo-generators utilizing exhaust gas energy out of the main diesels have begun to be used practically. Such generating systems are considered to change the diesel generating systems which have been used. On the other hand, the conventional two-boiler systems are going to be changed into one-boiler systems in turbine propelling vessels, so that the operation of turbine vessels may be so economical as that of diesel vessels. In order to make it possible, a new generating plant in turbine vessels is expected to develope. Further, electric propulsion vessels using multi high-speed or middle-speed diesels have recently begun to be used practically. It is considered that the cost of the electric propulsion systems will be reduced, if the generating plants can be used as the propulsion systems in common with the ship generating plants. The said new generating systems in vessels of turbines, low speed diesels must be studied now. In this paper, the author introduces these new generating systems for those having interests in these problems.
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[in Japanese]
Article type: Article
Pages
56-60
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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[in Japanese], [in Japanese]
Article type: Article
Pages
61-66
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
67-74
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
75-77
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
79-104
Published: February 29, 1964
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Article type: Appendix
Pages
105-109
Published: February 29, 1964
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Article type: Appendix
Pages
App1-
Published: February 29, 1964
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Article type: Appendix
Pages
App2-
Published: February 29, 1964
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Article type: Appendix
Pages
App3-
Published: February 29, 1964
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Article type: Appendix
Pages
App4-
Published: February 29, 1964
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Article type: Appendix
Pages
App5-
Published: February 29, 1964
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Article type: Appendix
Pages
App6-
Published: February 29, 1964
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Article type: Appendix
Pages
App7-
Published: February 29, 1964
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Article type: Appendix
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Published: February 29, 1964
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Article type: Appendix
Pages
App9-
Published: February 29, 1964
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Article type: Cover
Pages
Cover3-
Published: February 29, 1964
Released on J-STAGE: February 24, 2018
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