-
Article type: Cover
Pages
Cover1-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Cover
Pages
Cover2-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takanori NAKAMURA, Goro HATA, Eiichi KITAMI, Takaya YAMAMOTO
Article type: Article
Pages
1-8
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
Since increasing exports of heavy goods such as machine tools, chemical equipments, heavy transport vehicles etc., it is running current to install a split topping cargo gear system on board such vessels as heavy lifters and cargo liners. Adopting the split topping and tri-pod mast, the authors developed the MITSUBISHI TRI-POD HEAVY cargo gear which can be served on two opposite hatches of the mast. This paper gives an account of details of design, the computation method of the mast structure and the comparison between calculated strees and actual stress on the MITSUBISHI TRI-POD HEAVY cargo gear, by way of example, on WAKAMATSU MARU (NYK, 11,000t cargo liner).
View full abstract
-
Kazuo NAKANO, Yasuhiro KUBOTA, Syuji KANDA
Article type: Article
Pages
9-15
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
Model tests were made to investigate the characteristics of mushroom anchors. Five mushroom anchors and a stockless anchor are used in the tests. From the model tests, the holding power and the hoisting load of the mushroom anchor are given as follows: Hoisting load at start, sand F=0.750sA+0.044W Hoisting load, apeak, mud F=0.408sA+2.32W Hoisting load, apeak, sand F=0.237sA+1.15W Holding power, mud F=0.655sA+0.992W Holding power, sand F=0.655sA+0.992W where, F=power or load(kg) A=projected area of the mushroom cap(m^2) W=weight of the anchor(kg) s=shearing strength of the bed soil(kg/m^2) formula] [numerical formula] [numerical formula] [numerical formula] It has a tendency that holding power or hoisting load is mainly dependent on the projected area (A) and the weight of the anchor (W), but less on the shape of the mushroom cap.
View full abstract
-
Shiro WATANABE, Sasagu KOMARU, Tomonori MISHIMA
Article type: Article
Pages
16-22
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
The bollard pull tests of tug boat models with nozzle propellers are carried out, to study the possibility to increase the astern thrust. A buttock flow form (B-type ship) and a normal tug boat form (N-type ship) are compared. The experimental results are as follows: 1) At M.C.R., thrusts of the B-type ship are about 4.2% (for the ahead) and 4.0% (for the astern) larger than the N-type ship. 2) The effects of the inclinations of the nozzle centre line to horizontal plane and vertical plane are not significant.
View full abstract
-
Masafumi IKE, Osamu HAMANO, Tetsuro KAMEDA
Article type: Article
Pages
23-28
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
Two powerful tugs have been built for use at the newly constructed giant dockyard located in Sakaide, Shikoku. Considerng various requirements as a dockyard tug, a Voith-Schneider propeller and a controllable pitch propeller are adopted as propelling systems, respectively. Report is made on several items on initial planning, Kort nozzle, and ship's body lines which improved astern pull power, and finally, results of bollard pull tests of these tugs.
View full abstract
-
Michio NAKATO, Michimasa YAMADA, Toku AYANO, Pangestu WIDODO
Article type: Article
Pages
29-39
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
The main purposes of this paper are ; (1) to obtain the relations between stern forms with relatively simple frame lines and their viscous resistance, (2) to observe flow fields about various sterns. We chose four kinds of simple stern frame lines, named R, S. R-S and M, and their C_B and B/d were changed systematically. Experiments were made for about 60 model ships (Table1. Figs. 3and4) in circulating water tunnel having test section of L×B×d=2×1.2×0.8m. The results of resistance test are shown in Fig. 5. From the curves in Fig. 5 and an empirical formula shown below, we determined so called Form Factor "k" (Fig. 6) with Hughes basic friction line. The empirical formula is, k=k(circulating water tunnel)×const., where the constant was determined from experiments of mother model ship (N type, Fig. 1) both in towing tank and in circulating water tunnel (Fig. 2). Observations of flow fields are shown in Fig. 7. In the Figure, stream lines calculated by Dr. Junnaka's method and trailing vortices oberved by Dr. Tagori's method are also shown. The computer programme of calculating stream lines is in Table2. written in FORTRAN II.
View full abstract
-
Junkichi YAGI, Yukio UEDA, Takaaki ISHIHAMA
Article type: Article
Pages
40-44
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
Recently, in conjunction with high speed digital computer, the finite element method of matrix structural analysis has been developed in several field of engineering. this method can be applied to analyze two or three dimensional structure and the stability problems etc. In this method, the structure can be considered as an assemlage of finite elements interconnected at a finite number of nodal points. In order to study the behaviour of assembled structure, it is necessary, first of all, to derive the properties of individual elements. This paper shows the possibility to an analysis of the elastic and plastic stress distribution of flat plate with a hole and presents the results of calculation. In the analysis, the stress-strain relationship in the plastic range is governed by Reuss flow law.
View full abstract
-
Yukio UEDA, Masakatsu MATSUISHI
Article type: Article
Pages
45-48
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
For the solution of the buckling of plates with the discontinuous boundary conditions, the energy methods have been the most powerful and usefulfor engineering purposes. The recent development in high speed digital computers has been giving favor to a numerical approach, termed "the finite element method". The authors developed the finite element method for the elastic, elastic-plastic and plastic buckling of plate and obtained quite satisfactory results for the case of uniform compression. In the paper, the authors applied the method to the buckling of plate with highly complicated boundary conditions. As a basic example of the application, the compressive buckling of the plate with discontinuous boundary conditions was solved by the method and compared with the analytical solution obtained by the energy method. The result was quite satisfactory and suggested the usefulness of the method.
View full abstract
-
[in Japanese], [in Japanese], [in Japanese]
Article type: Article
Pages
49-54
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
[in Japanese]
Article type: Article
Pages
55-61
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
62-63
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App1-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App2-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App3-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App4-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App5-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Appendix
Pages
App6-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Article type: Cover
Pages
Cover3-
Published: September 30, 1967
Released on J-STAGE: February 25, 2018
CONFERENCE PROCEEDINGS
FREE ACCESS