Journal of the Kansai Society of Naval Architects, Japan

[title in Japanese]

Article type: Cover
Pages Cover1-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_Cover1

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (77K)
[title in Japanese]

Article type: Cover
Pages Cover2-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_Cover2

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (77K)
[title in Japanese]

Article type: Appendix
Pages App1-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App1

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (279K)
Effect of Water Pressure on the Performance of Bottom Paint

Michiya SHIGEMITSU, Izumi MIYOSHI, Yukiko SAKAE

Article type: Article
Pages 1-6
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_1

CONFERENCE PROCEEDINGS FREE ACCESS

Show abstractHide abstract

For bottom Paint, resistance against hydraulic pressure is of great importance because of their severe employment in deep sea and in high velocity flow. Therefore, we have tested their water-absorption and -penetration qualities on several kinds of bottom paint in water of 5 to 30 atmospheric pressure and of room temperature. The results are as follows: (1) Polyvinyl and Neoprene coatings are most excellent. (2) Some coatings of silver enamel type are also of high resistance. (3) Ordinarily coated bottom paints (oil paints) are more resistive than ordinary anti-corrosive paint coatings.

View full abstract

Download PDF (842K)
The Effect of Drying Time on the Performance of Antifouling Compositions

Yoshio NAGAISHI, Kokichi OGASAWARA

Article type: Article
Pages 7-22
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_7

CONFERENCE PROCEEDINGS FREE ACCESS

Show abstractHide abstract

In order to study the effect of drying time on the performance of antifouling compositions, two proprietary ship's bottom paint systems, commercially obtainable in this country, were tested on a raft after being allowed to dry for periods of 3, 12 and 24 hours and 10, 30, 45,60,75,snf 90 days respectively. Both systems used, one being of an oil-base type and the other of a vinyl resin type, consist of wash primer, anticorrosive and antifouling compositions. Shot-blasted mild steel panels (300^<mm>×300^<mm>×4.5^<mm> in size) were primed with one coat of wash primer, and after about 4 hour drying, it was followed by 3 or 4 coats of anticorrosives at intervals of approximately 24 hours between coats and finally by one or two coats of anitifouling compositions except for 100^<mm> wide patches (to be used for non-toxic controls) at the same intervals on both sides. Most of these panels, however, being seriously damaged by a typhoon in the course of the test, this work could not be carried out with a successful finish. The hope of the authors is that this paper will be considered as an interim report about the subject to date and form a point of departure for further investigations. It is suggested that antifouling compostitions in general may possibly be subject to atmospheric exposure for a fairly longer time, the extent of which depends on their types, formulations and others, without any detrimental effect on the performance than as recommended by their manufacturers. In this connection, it is not certain whether such failures of antifouling paint films as chalking, checking and cracking resulted from a long time weathering can be responsible for increasing their leaching rates, namely resistance to fouling (with subsequent shorter life and premature decay of coatings as well). This is, in the authors' opinion, one of the most important problems demanding urgent researches. In this paper the effect of film thickness of antifouling composititions on the performance is considered and some of the precausions to be taken when carring out these kinds of experiments are also given. In addition, conventional testing procedures and methods are briefly discussed from technical standpoint.

View full abstract

Download PDF (2090K)
Application of the Theory of Ship Motion among the Waves on Ship Design

Kikuo TAKAHASHI, Eiichi KAWASHIMA, Minoru SAKAO

Article type: Article
Pages 23-34
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_23

CONFERENCE PROCEEDINGS FREE ACCESS

Show abstractHide abstract

On the ocean, ship can not sustain the same speed as in calm sea. As the cause, we can consider following factors;- 1. Increasing of resistance and decreasing of propulsion efficiency. 2. Deck wetness related to freeboard. 3. Acceleration related to physiological reaction of crews. 4.Increasing of stress by wave bending moment ro slamming. These are all governed by ship motion among the waves. In this paper, we calculated the ship motion and resistance among the two dimensional regular waves theoretically, and investigated the limitation of speed among the waves of a high speed ship.

View full abstract

Download PDF (1235K)
On the Lower Limit of Tidal Height at Launching

Issei SUETUGU

Article type: Article
Pages 35-38
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_35

CONFERENCE PROCEEDINGS FREE ACCESS

Show abstractHide abstract

At the calculation of launching the verification of safety against tipping is of great importance. If a ship tips before lift by stern, the overpressure on the way ends will damage its hull; moreover the fore poppet may crumble when the stern is lifted upwards. In some cases, tipping can be attributable to the lack of the depth of water over the end of the ways. In the paper the author treats the relation between tipping and minimum tidal height, and also gives the method of determining the necessary and economical length of the ground ways.

View full abstract

Download PDF (496K)
On the Dimension of an Emergency Exit : 1st.Report

Eisuke IWASA, Katashi TAGUCHI, Masaru IKEDA

Article type: Article
Pages 39-43
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_39

CONFERENCE PROCEEDINGS FREE ACCESS

Show abstractHide abstract

In spite of many disasters at sea, little attention has been turned to designing the escaping equipments in ships such as gateway, passage and stairway. With a view to set a criterion on designing such equipments the authors studied, as a first step, experimentally the movement of the crowds that flee in great confusion through emergency exits of various dimensions. As the result of experiments, the following relation has been brought to light: T=tB-2・15 where T is the time taken to pass a exit in question, B the width of the exit in metre and t the time taken to pass the exit of one metre width. Expressed in words the time taken for a fixed number of people to pass through an emergency exit is inversely proportional to the 2.15 power of the width of the exit.

View full abstract

Download PDF (726K)
[title in Japanese]

[in Japanese]

Article type: Article
Pages 44-47
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_44

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (753K)
[title in Japanese]

Article type: Appendix
Pages 48-49
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_48

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (197K)
[title in Japanese]

Article type: Appendix
Pages App2-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App2

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (230K)
[title in Japanese]

Article type: Appendix
Pages App3-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App3

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (238K)
[title in Japanese]

Article type: Appendix
Pages App4-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App4

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (235K)
[title in Japanese]

Article type: Appendix
Pages App5-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App5

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (232K)
[title in Japanese]

Article type: Appendix
Pages App6-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_App6

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (235K)
[title in Japanese]

Article type: Cover
Pages Cover3-
Published: March 30, 1956
Released on J-STAGE: February 24, 2018

DOIhttps://doi.org/10.14856/kansaiks.81.0_Cover3

CONFERENCE PROCEEDINGS FREE ACCESS

Download PDF (174K)

Register with J-STAGE for free!