関西造船協会誌

表紙

原稿種別: 表紙
p. Cover1-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_Cover1

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目次

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p. Cover2-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_Cover2

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船舶艤装品の統計的品質管理について : 加工外注品に対する一考察

金尾勝人, 宮首素文, 赤松邦彦, 准田勝照, 口石勝, 薮内捷之, 永井邦男

原稿種別: 本文
p. 1-6
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_1

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Ships are provided with many kinds of purchased equipments with various quality characteristics. Though the inspection method we have is adequate to get good quality of these equipments, the recent economic situation obliges us to rationalize the inspection method. From this point of view, we, department of inspection, have studied sampling inspection method for a part of purchased equipment manufactured based on our drawings. As a result, it has been proved that this method is applicable from the stand point of quality assurance.

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2号塗膜中に含まれる銅の溶出挙動について

森稔, 柳瀬元昭, 寺田誠二, 中村達三郎

原稿種別: 本文
p. 7-14
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_7

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The so-called "glycine" test was carried out in order to evaluate the performance of antifouling paints. However, unsatisfactory results were obtained. So, a modified glycine test was examined. The satisfactory copper leaching rate/time of exposure curves were obtained. In addition, Electron probe micro analyzer was used to obtain an information about the behaviour of copper leaching from antifouling paints.

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タンク内ドレンコースの流れの一計算

赤木新介, 宮武稔明

原稿種別: 本文
p. 15-22
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_15

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When fluid is pumped out from a ship's tank, flow in the tank is obfen obstructed by inner structures of tank. In order to avoid these phenomena, suitable size of drain holes are to be provided for tank structural platings. However, few studies are found concerning these kind of problems. This paper deals with these types of flows, and gives a well applicable calculation method.

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有脚式海洋作業台船の波浪中離着底時の挙動について

平野美木, 堀田平

原稿種別: 本文
p. 23-31
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_23

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When a self elevating platform carried out the jacking up or jacking down operations in the rough sea, its very long legs collide to the sea bottom due to the pitching motion of the platform's barge hull, especially at the case of the legs are very close to the hard bottom. This shock load will affects very seriously to the leg's constructions and jacking mechanism. The shock load related with the wave height and period, also the gap between the leg base and the sea bottom. Model experiments were carried out at the Tokai University's circulating tank which has glass wall on both side. We observed the behaviour of the leg motion and took the 8 m/m movies. Also the shock load measured by the accelerometers. We get following results. The shock load on the weather side legs is larger than that on the lee side legs and maximum value is about 2.5 times of statically hull weight load on the each legs. i.e) 1/4× (hull weight), in case of gap δ= 0. S.E.P. swims down jumpingly to the lee side of wave because there are no mooring and restricted by anchoring seriously bending and shering effect to the legs. Meanwhile, these collision phenomenon occures few cases and has very short duration time in the whole working periods of S.E.P. . Then if we can use anti-pitching devise at this time, it is very efficient to decrease the shock lord. Actually it was reduced to about 60 percents in our model experiments.

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半潜水式浮遊構造物に働く流体力について : 三次元特異点分布を用いた厳密計算

杉浦正憲

原稿種別: 本文
p. 33-42
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_33

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Added masses, damping coefficients and wave forces on semisubmersible bodies are calculated by making use of singularity distribution method following Faltinsen and Michelsen The accuracies of the results of wave forces are examined by comparing the values of the diffraction problem with those of the radiation problem from Haskind relation. Total added masses, damping coefficients and wave forces estimated from the simple addition of those of elementary bodies are compared with those calculated as total bodies. In some range of wave number, there seem to be considerable differences between these two values.

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2枚の垂直板間の水柱の運動と透過波について

高井忠夫, 山本茂, 一色浩, 根角幸明

原稿種別: 本文
p. 43-49
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_43

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Two problems are calculated by the "Joining Method of Divided Regions". The one is the diffraction wave through two vertical flat plates. The another is the radiation wave produced by the sinsoidal pressure fluctuation acted on the free surface between two vertical flat plates. These results are compared with those by an approximate method in which the vertical motion of fluid column between the plates is replaced by the rigid body motion. The agreement of these two methods is fairly good, if the distance between the plates is the same order as the draft. The discrepancy between the calculation and experiment is remarkable in the diffraction problem in the vicinity of a wave length where the motion of the fluid column between the plates is resonant.

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船舶の操縦性における模型試験法と実船の性能の推定

岡本洋, 山上順雄, 鬼木博文

原稿種別: 本文
p. 51-56
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_51

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The paper deals with model test techniques to estimate manoeuvring qualities of actual ships. Scale effect is an important problem in estimating the manoeuvring qualities of actual ships by model tests. To solve this difficult problem, two model test techniques are proposed; one is a free-running test technique with large models (length of models ≒ 15m), and the other is a captive model test technique with small models (1ength of models ≒ 3m). In the former, by using large enough models, and in the latter, by improving the technique, such as by choosing an adequate swaying or yawing frequency, we consider the problem of scale effect can be solved. From the fact that some manoeuvring characteristics estimated by these model test techniques agree well with those obtained from manoeuvring tests for some actual ships at sea, it is concluded that these techniques would be effective to solve the scale effect problem.

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風による浮体の自励横揺れ

定兼広行, 菱田敏男

原稿種別: 本文
p. 57-63
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_57

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We used to understand the wind action usually in its summarized features. But, minute experiments prove that the wind acts on horizontal surfaces of a vessel in a manner different from on vertical ones. The difference has influence on the behavior of a vessel in the wind. Sometimes, the heeling angle varies according to the area or the position of a horizontal surface even in the wind with the same speed. In some cases, the wind resists less to the rolling in the wind than in no wind, moreover, a vessel goes on rolling in the wind without any periodic excitation as waves. The present paper deals with those phenomena.

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いるかの推進運動について(2) : 尾びれの定常特性

平野進

原稿種別: 本文
p. 65-71
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_65

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It is well known that J.Gray demonstrated on the basis of engineering calculations in 1936 that it is possible for dolphins to attain their high swimming speeds only in the case of total laminar flow. Swimming locomotion under conditions of turbulent flow, would require approximately seven times the power which are estimated to be capable of producing. As is known, hydrodynamic thrust in dolphin locomotion, chiefly, is generated by periodically repeating oscillatory motions on the vertical plane of tail fin of complex shape. At the present time we possess incomplete data for shape of a tail fin. Therefore, at the present stage of investigation with the aim of finding the thrust of a tail fin, it is important to obtain shape and steady state characteristics of a tail fin. In order to investigate into the steady state characteristics of a tail fin, the three component tests has been attempted for a half sized tail fin model in towing tank, and the results is compared with the calculated values of the wing theory.

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An Example of the Calculation of the Three-Dimensional Turbulent Boundary Layer on a Tanker Model

Nabil SEHSAH

原稿種別: Article
p. 73-84
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_73

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The cross flow profile in the three-dimensional turbulent boundary layer is discussed, and it is shown that it is more convenient to express the cross flow velocity as an explict function of the main flow velocity. Considering polynomials of different degrees, it is shown that the 3rd degree polynomial is better in representing the cross flow in the sence that it decreases the dependency of the calculated limiting streamline angle on the conditions at the boundary layer outer edge. The concept of the skew function, which gives the distribution of the velocity component normal to the wall shear stress is introduced, and it is shown that this function is not universal. Using the 3rd degree polynomial for the cross flow it is possible to represent the different trends of the available experimental results for the skew function. The boundary layer calculations are conducted for a tanker model using a two parameter cross flow profile and Johnston equation as the auxiliary equation for the cross flow. The results are in reasonable agreement with the experimental trend, although there are some points which still need more research.

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船体構造における応力集中

服部堅一

原稿種別: 本文
p. 85-98
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_85

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A ship is essentially an indeterminate structure in which internal forces such as bending moments and shear forces may become very large at certain points of structure and many kind of stress concentrations may occur at points of discontinuity. In Section 2, the concept of stress concentrations due to internal forces and discontinuities are discussed with the aid of the finite element method. In Section 3, the feature of stress concentrations which may be classified into several types is presented, although various phenomena of stress concentrations are observed in actual ships. Finally, the question how to deal with such stress concentrations at ships' structural design is discussed.

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不規則波中のspringing vibrationの計算法について (第1報)

石垣裕嗣, 高木又男, 服部陽一, 坂田則彦

原稿種別: 本文
p. 99-105
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_99

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The calculation method of springing vibration in irregular waves has been studied. In this report, however, numerical calculation of response of three large tankers (D.W. 130,000 tons, 230,000 tons and 280,000 tons) in regular waves has been carried out in order to investigate the tendency of springing phenomena. In results following facts are clarified. l) As ships grow larger, response becomes bigger. 2) In case of D.W. 130,000 ton tanker, responses of 2nd and 3rd resonance are very small in comparison with that of primary resonance but in case of D.W. 230,000 ton and 280,000 ton tankers, responses of 2nd and 3rd resonance are not negligib1e.

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続弾性体の水中振動について : 従来の付加水質量算定法を修正した解析法の円柱への適用例

有馬健次

原稿種別: 本文
p. 107-113
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_107

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This paper deals with two calculation methods, using Rayleigh-Ritz method, of natural frequencies of vibrating circular cylinder submerged horizontally or vertically in water. These methods were presented previously by the author, of which one was the hydroelasticity method and the other the approximate method. The former was very effective for the analysis of flexural vibration of circular cylinder in water and the latter for the analysis of ship vibration. In this paper, natural frequencies of circular cylinder computed by the approximate method are shown to be comparatively in good agreement with those computed by the hydroelasticity method.

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高強度鋼の疲労強度におよぼす変動荷重の影響

中村宏, 岡崎章三, 岡田友信

原稿種別: 本文
p. 115-124
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_115

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With a view to studying on the effect of varying stress on the fatigue strength of the high strength steel, the multiple repeated rotating, or plane bending fatigue tests were carried out at two stress levels on three high strength steels, which were S15CK tufftrided steel, SCM4 induction hardened steel, and l% Cr-Moquenched and tempered steel taken from the main gear for marine propulsion turbine. The results obtained are summarized as follows; (1) On the S15CK tufftrided steel, the fairly low stress under the fatigue limit is affected considerably the fatigue life, in case of σ_1=45kg/mm^2, n_l/N_l=0.03 (n_l/n_2=2×10^4/5×10^6). (2) On the SCM4 induction hardened steel, the understress till 0.5 σ_ω (σ_ω; fatigue limit) is affected the fatigue life, in case of σ_1=80kg/mm^2, n_l/N_l=0.1 (n_l/n_2=5×10^3/5×10^6). (3) On the l% Cr-Mo quenched and tempered steel, the fairly low stress under the fatigue limit is affected considerably the fatigue life, in case of σ_1=50kg/mm^2, n_l/N_l=0.1 (n_l/n_2=8×10^3/5×10^6), 0.05 (n_l/n_2=4×10^3/5×10^6).

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海上試運転の合理化について

関西造船協会 , 試運転合理化研究委員会

原稿種別: 本文
p. 125-142
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_125

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GUARICO : ヴェネズェラ向貨物船

三菱重工業株式会社神戸造船所

原稿種別: 本文
p. 143-147
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_143

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会報

原稿種別: 付録等
p. 149-153
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_149

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[OTHERS]

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p. App1-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App1

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ANANGEL HONOUR

原稿種別: 付録等
p. App2-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App2

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GUARICO

原稿種別: 付録等
p. App3-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App3

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文光丸

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p. App4-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App4

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FORT KAMLOOPS

原稿種別: 付録等
p. App5-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App5

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AVON

原稿種別: 付録等
p. App6-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App6

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AMIRAL M.ALI ULGEN

原稿種別: 付録等
p. App7-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App7

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[OTHERS]

原稿種別: 付録等
p. App8-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_App8

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裏表紙

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p. Cover3-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_Cover3

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CONTENTS

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p. Cover4-
発行日: 1977/03/30
公開日: 2018/03/30

DOIhttps://doi.org/10.14856/kansaiks.164.0_Cover4

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