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Article type: Cover
Pages
Cover1-
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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Article type: Cover
Pages
Cover2-
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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Kaichi YOSHITAKE, Jitsuzo NAGAO
Article type: Article
Pages
1-5
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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This paper deals with some improvements of hull structure which have been applied, with the approval of classification societies, to the ships built in the authors' shipyard for the purpose of saving materials and labors. They are as follows: 1. Bracket built up with plate inserted between the splitted web and flange of angle, in place of ordinary flanged-plate bracket. 2. Rolled I-bar used for hatch shifting beam, web frame in engine room or hold, and pillar in engine room. 3. Straight rudder stock of two-pintle rudder in place of curved stock. 4. Gunwale flat bar in place of angle. 5. On-deck girder and raised deck. 6. Transverse framing for the construction of engine room bottom in combination with longitudinal framing in hold double bottom. 7. Widely spaced pillar serving for hold ladder.
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Kazuo TERAZAWA, Junkichi YAGI
Article type: Article
Pages
6-12
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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In order to release the long superstructure from longitudinal stress, expansion joints are used. However, at the corners of the joints comparatively intensive stress concentration occurs and the cracks have often been observed starting from these points. Therefore to find the type of the joint which can reduce these concentrated stresses, the tension tests were carried out on the simplified superstructure models which have recesses on the wall instead of the expansion joints. And the effectiveness of the recess on the reduction of longitudinal stress in the wall and the stress concentration at the bottoms of the recesses and at the corners of openings were investigated.
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Toshihira YAMANOUCHI, Tsuneo NAKAI, Setsuji MINEHISA
Article type: Article
Pages
13-18
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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The authors made a study on the influence of the procedure of arc-air gouging on the breadth B (cm) and depth D_1 (cm) of the groove and the induced angular distortion T. The experimental results are shown in Fig's 2 to 12. They are affected by the gouging procedure such as gouging current I (amp) and speed v (cm/sec), plate thickness h (cm), air pressure P (kg/cm^2), rod diameter d (cm), gouging torch, etc. Empirical formulas obtained are [numerical formula] and [numerical formula] where [numerical formula] and [numerical formula]
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Eisuke IWASA, Katashi TAGUCHI, Masaru IKEDA
Article type: Article
Pages
19-23
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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For the protection against inflow of sea water, the exits in ships are usually provided with sills. But the sill stands in the way of the so-called crowd flow, flow of people of high density, so the time required them to pass through exit increases greatly compared with the case of exit with no sill. The authors have studied by experiment on the influence of the sill height at emergency exits. As conclusion, the sill height of emergency exits should be less than 20 centimetres.
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Seiichi KOSEKI, Goro HATA, Muneo YOSHIDA
Article type: Article
Pages
24-32
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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Starting characteristics and speed controlling of A.C. motors especially for deck machineries prevented the A.C. electrification of ships. As the A.C. deck machineries, the Leonard system, pole change system, etc., are well-known. But O.S.K., T.D.K. and Mitsubishi Kobe Shipyard, in close cooperation, completed the perfectly A.C. electrified deck machineries after a long time investigation. The features of the A.C. winch are as follows: (1) Electric power source is A.C. 440 volts direct. (2) Rope speed can be controlled at will from extremely low speed to maximam, 190 m/min and over. (3) Two winches can be controlled easily by one operator. (4) Ruch current to source is so small and power factor is so high that we need no consideration about them. (5) Controller has some cheque terminals and maintenance is easy. Those of the windlass and mooring winch are: (1) Electric power source is A.C. 440 volts direct. (2) Windlass motor is 3peed pole changed wound rotor induction motor, and mooring winch motor is 2 speed pole changed wound rotor induction motor. (3) The characteristics are suitable for their purposes.
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[in Japanese]
Article type: Article
Pages
33-39
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
40-41
Published: September 30, 1957
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[in Japanese]
Article type: Article
Pages
42-43
Published: September 30, 1957
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[in Japanese]
Article type: Article
Pages
44-47
Published: September 30, 1957
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[in Japanese]
Article type: Article
Pages
48-50
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
51-53
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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Article type: Appendix
Pages
54-
Published: September 30, 1957
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Article type: Appendix
Pages
App1-
Published: September 30, 1957
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Article type: Appendix
Pages
App2-
Published: September 30, 1957
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Article type: Appendix
Pages
App3-
Published: September 30, 1957
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Article type: Appendix
Pages
App4-
Published: September 30, 1957
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Article type: Appendix
Pages
App5-
Published: September 30, 1957
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Article type: Appendix
Pages
App6-
Published: September 30, 1957
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Article type: Appendix
Pages
App7-
Published: September 30, 1957
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Article type: Cover
Pages
Cover3-
Published: September 30, 1957
Released on J-STAGE: February 24, 2018
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