日本航海学会論文集

表紙

原稿種別: 表紙
1980 年 63 巻 p. Cover1-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.Cover1

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目次

原稿種別: 表紙
1980 年 63 巻 p. Cover2-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.Cover2

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高速艇における繰返し衝撃,振動の人間工学的評価法 I

神田寛, 村山義夫, 田中正人, 鈴木潔

原稿種別: 本文
1980 年 63 巻 p. 1-10
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.1

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乗心地指数,振動感覚量,脊柱の傷害にかかわる力学的反応指数といわれる三つの指標を使用して,高速艇の典型的な衝撃性振動を対象とする,人間の耐性からみた多角的評価法を確立することを目的としている。この方法の特徴は,衝撃または振動に対応する人間の周波数特性からなるウェイティング・ネットワークを使用することに着目したことである。検討の結果,この方法は人間耐性からの評価にとって優れた手法であることが認められる。

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見張りの信頼性について

小川征克, 鶴田三郎, 杉崎昭生

原稿種別: 本文
1980 年 63 巻 p. 11-17
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.11

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The research on the reliability of lookout is seldom found, although the problem regarding reliability has come to occupy an important position in various aspects. A navigator keeps a lookout in various stiuation in order to operate his ship safely and efficiently. To avoid a collision between his ship and another is one of the most important purposes of the lookout. In this paper authors deal with the lookout performed for avoiding a collision, and investigate the reliability of it. They have put the survey (the questionnaire and the actual survey) into operation, in order to obtain basic data to establish a clear definition of the failure. They investigated on the reliability using this definition, and showed the results and the procedure to obtain the reliability quantitatively.

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避航の判断と操船者の特性-III : 避航開始距離とカタストロフィー

長畑司

原稿種別: 本文
1980 年 63 巻 p. 19-28
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.19

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Basic characteristics of navigators on maneuvers for avoiding collision were discussed in the first and second reports. In the present report I describe on an intereting conclusion reached by application of the theory of Catastrophe, and also, this report deals the mathematical analysis of the relative distance at beginning of maneuvers for avoiding collision and the distance of vision at sea. It is kinematically and geometrically formed the following equation concerning the relative distance ; [numerical formula] the following relation of the distance of vision X, was obtained as an empirical equation ; X=aR^b where R_0', θ_0' are non dementional values of the relative distance and the bearing rate of target ship, θ_p is angle of target ship to own ship, R is phiscal distance and k, a, b are respectivly constant based on a few assumption. There are a number of unclarified regarding the how and the when of navigator's judgement concerning avoiding collision, but it became clear his judgement by modeling of relative motion between surface ships and it agreed qualitatively with the observation results.

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コンテナの耐風に関する模型実験

本田啓之輔, 堀富士男

原稿種別: 本文
1980 年 63 巻 p. 29-34
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.29

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In order to investigate the wind-action on containers, authors carried out the model test on a container by making use of a wind generator blow-type. These models are 1/20 scale of 20 feet dry container, and we obtained results of model test as following. 1) The wind force coefficient (C) getting from these results of pressure distribution of each surface of the container are Cf (front)=0.681, Cb (back)=0.320 and Cu (upper)=0.631 respectively, and the more containers stack, the more these values of the coefficient increase. 2) The position of the centre of wind force are about 60% of the height of the front surface and about 50% of the height of the back surface of containers. 3) The wind critical velocity which actual containers may be going to slide or overturn has some connection with an aspect ratio of the vertical projected area of the stacked containers.

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強風下における1点ブイ係留船の港内避泊に関する模型実験

松田博之, 本田啓之輔, 小須田敏

原稿種別: 本文
1980 年 63 巻 p. 35-44
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.35

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In order to investigate on a single buoy-mooring in harbour under heavy weather, this paper provides analytical approaches in the prediction of relation between the mooring force and yaw-motion of a ship excited by strong wind, and also discusses practical methods to reduce the force and the yaw-motion. The experimental results of 1:50 scale model cargo ship 5, 000 GT class were used to check the calculated results of computor simulation on these problems. And the model tests in wind and current carried out by making use of both the wind generator tank and the circulating water tank at our laboratory.

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一軸コンテナ船の船首底衝撃による過渡振動曲げモーメントと波浪曲げモーメントから見た可航限界について

田中一雅

原稿種別: 本文
1980 年 63 巻 p. 45-53
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.45

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The theoretical study on the wave conditions of critical navigation of a single screw container ship (Lpp=175m, Cb=0.575) has been carried out from the viewpoint of structural seaworthiness in longitudinal strength. The wave conditions of critical navigation in the present paper are given in form of combination of significant wave height and average wave period of short-term seaway in which the sum of maximum whipping bending moment due to slamming and maximum wave bending moment at midship attaint to a given longitudinal strength in consideration of still water bending moment. It is found from the results that the navigable wave conditions at higher ship speed in head sea condition are governed mainly by whipping bending moment, in following sea condition by wave bending moment, so that the magnification of longitudinal strength of ship hull can't extend them in head sea condition effectively.

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漁船の極限状態における運動に関する研究 : そのII 海象との対応

川島利兵衛, 松岡達郎, 稲葉恭人, 天下井清, 松島寛治

原稿種別: 本文
1980 年 63 巻 p. 55-62
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.55

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The studies were performed to clarify the characteristics of the heavy motions of fishing boat in extreme condisions on rough seas. The experiments were performed with the use of a 2-meter long, selfpropelled fishing boat model in the wind waves at Ohnuma, Japan. According to the experiments and analysis, the probability density functions of the shipping waters on deck, which are considered to be the indispensable matter in the extreme conditions in rough seas, were deduced and discussed.

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船舶における等衝突危険度圏に関する研究

今津隼馬

原稿種別: 本文
1980 年 63 巻 p. 63-69
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.63

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In a collision avoidance for ship, it is necessary to know a maximum collision risk by one target, because we can not know a target's intention in advance. This potential collision risk by altering course can be shown by a width of a sum of collision course which include own ship's present course (Sum of collision risk on head), on the assumption that a target approach in colliding zone. Here, a contour of collision risk by altering course was defined by a locus of target's relative position which had a same value of a sum of collision risk on head. The problem of collision avoidance between two ships were solved by using this contour of collision risk by altering course and obtained some useful results for collision avoidance. This method is especially suitable for establishment of a standard of judgement for collision avoidance.

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ロランCの陸上伝搬速度による補正とその効果について

濱田悦之, 斎藤清隆, 鈴木裕

原稿種別: 本文
1980 年 63 巻 p. 71-75
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.71

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Loran-C processors generally use a propagation velocity of electromagnetic waves over sea when transforming the coordinates. However, there were a lot of deviation between the processed positions and observed ones gotten near the Japanese southern coasts. As the reasons, there may be many causes. This paper describes about a land propagation velocity calculated from the differences between calculated time differences at known places and observed time differences, and the effect of the compensation by the use of that land propagation velocity onto the land paths gotten from the charts, in a good accuracy.

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関門海峡中部水域における船舶交通と漁船操業の実態

神鳥昭, 中田裕, 本村紘治郎, 実藤了

原稿種別: 本文
1980 年 63 巻 p. 77-85
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.77

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The central areas of the Kanmon strait which are the object of this study are greatly congested with shipping traffic and fishing operation, and marine accidents have been occured frequently. Therefore, the survey of the shipping traffic condition was carried out from 31 May to 3 June 1978, using shipborne radar, cinecamera and visual observation. It becomes clear from the results of the survey that nearly 90% of the navigating ships are those less than 1, 000 gross tons, considerable number of ships navigate along the illegal route at the winding part of the passage and the approaches, and sometimes, the line fishing boats are carried away to the inside and the vicinity of the passage by wind and current. On the basis of the survey results, the shipping traffic improvement plan is discussed about the preparing of navigational aids for ships passing through the passage and the arrangement of the fishing operation.

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ヨット・モータボート用参考図編集についての考察

坂戸直輝, 沓名景義

原稿種別: 本文
1980 年 63 巻 p. 87-95
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.87

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On the occasion of Quarter-ton International Yachting Race, which was held in the adjacent seas of lzu Syoto (Islands), Oct. to Nov. 1978, the Japan Hydrographic Association published the Off-shore Yachting Chart titled "Tokyo Wan to Omae Saki (including Miyake Sima and Mikura Sima)" at the scale of 1:500,000 (Lat. 35°). This was the first Yachting Chart published in Japan. The second chart of this series titled "Omae Saki to Sio-no-Misaki" was issued adjoining to the first one with the same scale. In 1979, the series of Coastal going Charts for Yachts and Small Crafts was planned to issue. This series consists of two charts cover the area of Zyo-ga-Sima to E-no-Sima at the scale of 1:30, 000 and has recently published. Those series are made in small size (48×32cm), printed in multicolour on both sides, and finished with water proof. We explain the process of planning and compilation of those two series and study the future problems.

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Slip内の波高分布に関する二,三の考察

椹木亨, 久保雅義

原稿種別: 本文
1980 年 63 巻 p. 97-106
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.97

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A numerical method proposed by Lee to calculate a harbor oscillation is applied to estimate a wave height distribution in a slip. It is found that the numerical error of his method becomes larger near the quaywall compared with the inner slip. So, in order to reduce the numerical error and apply his method to the case of oblique incident waves, a modified method is developed. By this method, the existence of the lateral oscillation in the slip, which could not be predicted by Ippen and Goda, can be clearly shown. The calculation results also coincide with that of experiments conducted by using a wave basin.

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北海道周辺における台風20号(昭和54年)による海象と漁船被害について

川島利兵衛, 天下井清, 蛇沼俊二

原稿種別: 本文
1980 年 63 巻 p. 107-115
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.107

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The typhoon 20, 1979 was strong and severe. It ran through the Japanese Islands quickly and caused damages throughout Japan. In this paper, the behaviour of typhoon 20, 1979 and the state of the sea as the typhoon approached the coast of Hokkaido, were investigated. In addition, the damages to fishing boats, fishing facilities and establishments and sea causalities of fishing boats were investigated. In this investigation, the relationship between the movement of the typhoon 20 and damages and sea causalities caused by the typhoon were considered and discussed.

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曳網中の船体運動

天下井清, 川島利兵衛

原稿種別: 本文
1980 年 63 巻 p. 117-133
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.117

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This is an experimental study in the full scale ship on the dynamical properties between ship's motions and towing warp tension in trawl fishing. The experiments were performed on the stern trawler and the ship's motions and warp tension were measured and recorded simultaneously in several sea conditions during the 4 years. In this paper, the authors describe the ship's motions in trawl fishing by the methods of stern-type, especially about the effects of towing a trawl net. The ship's motions while towing a trawl net and without the net in similar conditions were measured in a manner already described in the former paper. From these data, the statistical properties and power spectra were obtained and the comparison of motions while towing a trawl net and without the net were made under several sea conditions. And it was found that the ship's motions while towing a trawl net are different from the motions without the net.

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95%確率円方式による船位誤差界について-II

平岩節

原稿種別: 本文
1980 年 63 巻 p. 135-140
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.135

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For a circular contour, which is one of the methods for indicating an error boundary, the author has studied the conditions for the probability of a ship's position fixed by two position lines lying within a 95% circle by probability integrations. In this case, the coefficient in the equation to indicate the radius is a function of an intersecting angle and an accuracy ratio between two position lines. The author has examined several accuracy ratios and applied the system to the error boundary of a ship's position fixed by two unequally accurate position lines and by three equally accurate position lines. Furthermore, it is shown that the accuracy contour for a fix is an ellipse, whether the accuracies of the position lines are the same or not, and a method is developed to replace an error ellipse for two position lines of unequal accuracy with an ellipse formed by two equal accuracy position lines. The method is extended to three position lines of unequal accuracy. It then becomes possible to indicate an error boundary by a 95% probability circle. In this paper the author described the results with which he applied the system to several concrete examples.

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論文集原稿執筆のしおり

原稿種別: 付録等
1980 年 63 巻 p. App1-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.App1

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講演用アブストラクトについて(論文審査内規抜粋)

原稿種別: 付録等
1980 年 63 巻 p. App2-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.App2

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奥付

原稿種別: 付録等
1980 年 63 巻 p. App3-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.App3

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裏表紙

原稿種別: 表紙
1980 年 63 巻 p. Cover3-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.Cover3

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CONTENTS

原稿種別: 表紙
1980 年 63 巻 p. Cover4-
発行日: 1980/08/15
公開日: 2017/01/15

DOIhttps://doi.org/10.9749/jin.63.Cover4

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