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Article type: Cover
Pages
Cover1-
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Article type: Cover
Pages
Cover2-
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Tadashi SUGIYAMA, Hisashi OGAWA, Ryuichi YOSHIDA
Article type: Article
Pages
1-10
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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This heavy derrick gear was installed in sister ships SHUNKOKU-MARU and SHUN-EI-MARU, completed in Kawasaki Dockyard Company in July and August, 1960, respectively. Both ships which are owned by Nihon Kisen K.K. and operated by Hinode Kisen K.K., having identical overall length of 132.480m and deadweight of 9,009t, were designed to load and carry extra-super-heavy cargoes, such as rolling stocks, barges, heavy machineries and etc. The most unique feature of the heavy derrick, which has the capacity of 180 tons, is the adoption of the so-called "2 hatch-1 derrick system", enabling one unit of heavy derrick to serve two cargo hatches. Adoption of this system realized decrease in weight of about 20% from the ordinary "1 hatch-1 derrick system". The gear consists of a tower mast installed on the ship center line of maximum diameter 3.600m, with a goose neck ring provided at its foot and with a 180 ton heavy derrick boom connected with the ring. Fall wire and topping lift wire, which are led inside of the tower mast, are wound by 35 ton steam driven heavy duty winches installed on both sides of the upper deck. A heavy derrick boom is capable of rotating about 320° from 70° swing out position at the forward starboard side to 70° swing out position at aft starboard side. In order to minimize the friction by rotation Of the goose neck ring, the ring is supported by 692 roller bearings. The results of 200 ton overload test carried out for the gear illustrated favorable agreement with the respective design values. Details, design and the test results of the gear are described below.
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Renzo NIHEI, Kazuo NAKANO, Tamotsu UCHIDA, Sansei MIKI
Article type: Article
Pages
11-18
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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A torispherical head is commonly used for the end plate of a pressure vessel. Many analytical and experimental studies were made to evaluate the discontinuity stresses of the head, but refined results have not been found. Recently, rigorous analysis were proposed, but these are not suitable for practical design use. Formerly, authors attempted a practical method of the analysis, that is, the finite difference method is applied to the toroidal part and the analytical solutions of the other parts are combined with the former, and the results by calculations were compared with experimental results on a few vessels. Now we made a pressure test of a large pressure vessel with torispherical head, and by the experimental results of stress measuring the adequacy of the proposed method was confirmed.
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Toshio SAKAI, Yojiro YAMAMOTO
Article type: Article
Pages
19-25
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Up to the present, the statical longitudinal bending moment acting on a ship has been estimated graphically by means of integraph or approximately by simplified calculations. The authors recently built up the method by which the bending moment is calculated using a digital computer. In the usual calculations, the higher accuracy is aimed at, the longer time would be taken, therefore the accuracy would not be so good as to be expected if the time is restricted. The method using a digital computer can dissolve these defects and calculate accurately in shorter time the statical bending moment with less data.
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Shigeru TAKEWAKI, Yoshiji IMAI, Hiroshi MASAGO, Ryozo NAKAMURA, Seinos ...
Article type: Article
Pages
26-34
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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When operating main engine, vessel's engineers normally follow instruction books furnished by shipbuilders. It is doubtful however if,by means of such books alone, intentions of the engine builders are properly conveyed to the engineers, or true requirements of the latter are adequately answered. With this point of view, the Kansai Society of Naval Architects has recently circulated among vessels in service a questionnaire consisting of the following items to study actual experiences in handling of diesel engines: 1. Particulars of main engine. 2. Cooling method of main engine. 3. Vessel's past service records. 4. On handling of engine at starting and stopping. 5. On handling of engine at stand-by. 6. Comments on warming and cooling of main engine. Experience in severe cold. 7. On drawing of piston. 8. Time when F.O. valves are replaced. 9. Type of system oil, cylinderoil and fuel oil used. Answers received from 79 vessels are summarised.
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Jihei NAKABAYASHI, Sadayuki TANAKA, Hiroshi NOMURA
Article type: Article
Pages
35-41
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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The rig-testing of turbochargers involves two distinct types of test, i.e. development and production. In production testing, turbocharger is put into self-running and overspeeded in such a way that fuel oil is supplied to the air flow discharged from the compressor of its own turbocharger and this combustion gas is led to the turbine. Its principal object is to ascertain reliability and security of construction of the unit after its completion. In case of such a production test rig,only a starting blower of rather small capacity is necessary, therefore cost of construction is comparatively low. However, in order to get, by such a test rig, information on component performance of turbocharger over the whole range of air flow, special treatment is required. On. this paper, means of testing and calculating method for estimating the working points are treated, and as an example, one of the test results is also reported.
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Masayuki YAMAMOTO
Article type: Article
Pages
42-43
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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This paper treats the elastic shear buckling of rectangular plate clamped at one edge and supported at the other three edges by energy method. Assuming the deflection surface of rectangular plate by the summation of infinite trigonometric series,the value of τb^2-h/Dπ^2 is calculated, (τ:buckling shear stress, b: length of one edge of the plate, h:thickness of the plate, D:flexural rigidity of theplate.)
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[in Japanese]
Article type: Article
Pages
44-48
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
49-51
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
52-55
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
56-63
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
65-70
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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[in Japanese]
Article type: Article
Pages
71-80
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Article type: Appendix
Pages
81-
Published: September 30, 1961
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Article type: Appendix
Pages
82-
Published: September 30, 1961
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Article type: Appendix
Pages
App1-
Published: September 30, 1961
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Article type: Appendix
Pages
App2-
Published: September 30, 1961
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Article type: Appendix
Pages
App3-
Published: September 30, 1961
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Article type: Appendix
Pages
App4-
Published: September 30, 1961
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Article type: Appendix
Pages
App5-
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Article type: Appendix
Pages
App6-
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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Article type: Appendix
Pages
App7-
Published: September 30, 1961
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Article type: Appendix
Pages
App8-
Published: September 30, 1961
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Article type: Cover
Pages
Cover3-
Published: September 30, 1961
Released on J-STAGE: February 24, 2018
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