日本航海学会論文集
Online ISSN : 2187-3275
Print ISSN : 0388-7405
ISSN-L : 0388-7405
56 巻
選択された号の論文の26件中1~26を表示しています
  • 原稿種別: 表紙
    1976 年 56 巻 p. Cover1-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 表紙
    1976 年 56 巻 p. Cover2-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 付録等
    1976 年 56 巻 p. App1-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 光田 寧, 石田 廣史
    原稿種別: 本文
    1976 年 56 巻 p. 1-8
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    甲板上の乗員乗客や荷物の風に対する安全性,船体構造,付属物の設置等,また気象観測,特に風速は船体影響の少ない所で観測されなければならないが以上これらの問題について風胴実験を行なった。模型はカーフェリーボート2隻とカーゴボート1隻を選び,風胴はゲッチンゲン型風胴を用いた。船体上空の風の流れはマストの高さまで船体影響を受けて乱される。横風を受ける場合は向い風の時より大きく影響され,マスト上空でさえ約10°近い上昇角の流れが計測された。甲板上の風向風速分布は相対風向によって変化し,向い風の時より横風の方が風速が強められ,所によっては20%増となり乱れも大きい。強風域も同様に横風の方が広く,風上側甲板上に分布した。これらの結果から風速等の観測は向い風の状態でマスト上で測ると船体影響が最も少なく観測される。船体構造や付属物の設置について留意すべき事が判明した。甲板上のある所ではマスト上と同じあるいはそれ以上の風速となることがあり,風の突風率を絶対風速の1.6倍とすると甲板上でも同じ比率と考えられる。この絶対風速の増加分が5m/sec,相対平均風速が15m/secを越すと歩行不安定を感じ,動揺する甲板上では乗員乗客の風に対する一つ安全基準としてみることができる。
  • 奥田 邦晴, 杉崎 昭生
    原稿種別: 本文
    1976 年 56 巻 p. 9-18
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    In general, the coefficients of deviation can be obtained from the conventional method. However, this method has some problems, such as ambiguity of the effect of the measurement error to the coefficients and the error involved in the computation deviation. So the authors intended to verify the method in comparison with methods of least squares, Fourier analysis, etc. From an analysis, it was provided that the considerable computation error is derived from the method when the measurement error exists. Then the authors came to the conclusion that the systems of linear equation with five variables is a recommended method using five deviations at near 72 degrees intervals of headings when one wants to obtain five coefficients of deviation.
  • 巻島 勉, 今津 隼馬, 林 尚吾
    原稿種別: 本文
    1976 年 56 巻 p. 19-25
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    Leading beacons are simple to see but they offer a good position line. There seems to be few reports about this accuracy of the position line. The authors forwarded some research about this problem. When the visual angle subtended by the two (front and rear) beacons is less than a specific value, it is supposed that anyone can not find whether he is on the leading line or not. This threshold value is written by ε. The direction connected the two beacons is x axis, and the normal to it is y. Then the locus of position on which the visual angle is always constant ε is formulated by equation (1). Here, D is the distance between the two beacons, and x is measured from the front beacon. Where x is not so much great, equation (1) is transformed to equation (2) and practically (3). y represents the error of the leading line, and we see this depends on x, x/D, and of course on ε. The authors attempted to measure the value of ε. They observed the leading lights at NAARAIKO. Zigzagging about the leading line, an observer judged whether he is on the line or not, and simultaneously the beacons are photographed by telephoto lens. The observed results are shown on Fig.3. In this figure the white marks represent that the observer judged he is on the line and the black marks represent out of line. From this they concluded that the threshold value ε is about 20". The observer used a binocular, the magnification factor of which is 7. They also concluded that the range of error is represented by the second order equation (3).
  • 平岩 節
    原稿種別: 本文
    1976 年 56 巻 p. 27-32
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    An officer on duty on a fishing vessel watches the fishing gear drifting after setting the salmon gillnet or the tuna longline. Hereupon, if he can predict the position of his drifting ship by any method concerning the gear, he can effectively use the method to determine the opening position of the drift and forecast its closing location. From this point of view, the author studied this method founded on the experiments carried out aboard the Oshoro-maru and the Hokusei-maru, both fishery training ships of the Faculty of Fisheries of the Hokkaido University, and came to the conclusion that the drifting distance and direction can be forecasted by parameters with regard to the wind velocity, the direction of the wind and swell, and the ship's condition.
  • 濱田 悦之, 鈴木 裕, 柳川 三郎, 佐々木 幸康
    原稿種別: 本文
    1976 年 56 巻 p. 33-37
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    It is frequently required to get accurate ship's positions continuously while the ships are making oceanographic observation or fishing. This paper presents a method of fixing the ship's positions by interpolation using Omega observation between discrete fixes got by the radar or cross bearing method.
  • 木村 小一, 奈須 英臣
    原稿種別: 本文
    1976 年 56 巻 p. 39-45
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    Composite Wave Omega Techniqes was proposed by J.A. Pierce and modified by W. Papousek and F.H. Reder in reference papers (1) and (3). These techniques hypothesize a composite wave whose propagation velocity is not affected by heights of ionospheric layers and their propagation time from Omega station can be calculated from propagation times of 10.2 and 13.6kHz Omega basic frequencies. This paper describes a evaluation result of these techniques and position determination calculation method using these techniques. Evaluation was carried by data obtained by a reciever with rubidium atomic standard as its local osillator and PPC tables from several Omega stations to Tokyo area. The calculation resolved three unknown parameters (longitude, latitude and frequency drift of reciever's local oscillator) by use of phase measurement data from three Omega stations. The results of positioning calculations are shown in Figures 7, 8, 11 and 12.
  • 今津 隼馬, 林 尚吾
    原稿種別: 本文
    1976 年 56 巻 p. 47-52
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    The Loran-C system is one of the more accurate operational methods of continuous position. But Loran-C position accuracy depends upon the signal-noise ratio and measurement errors. A tracking method of several zero cross points is one of the measurement method of Loran-C signal to improve the signal-noise ratio and to discriminate between ground-wave and sky-wave with intervals of Loran-C cycles. Ship tests have demonstrated the performance of this method and have established to provide accurate continuous position.
  • 大條 廣
    原稿種別: 本文
    1976 年 56 巻 p. 53-58
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    When the radar operate to the senser of digital system, it will be most important problem that the terget detect in noise. Usualy, S.T.C. (Sensitivity-Time Control) may be well used to restraint of sea clutter, but S.T.C. is not perfect for the digital system. Then this paper describe about characteristic of sea clutter, a new signal processor and the S/N evaluation.
  • 柴田 恵司, 真野 季弘, 高山 久明
    原稿種別: 本文
    1976 年 56 巻 p. 59-68
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    Temmas have long been the prevailing scull boats used for coastal fishing in Japan, but recently they are gradually being replaced by FRP boats. A series of measurements was carried out on the hull lines of 11 temmas in the fishing villages in the vicinity of Nagasaki City, giving the following results: 1) A discriminant analysis showed that temmas could be devided into two types, the inland sea type and the open sea type, and that they differ from primitive boats such as conoes in the tropical Pacific and sabanis in Okinawa Pref., 2) temmas have rather large minus values of ⦻ B and ⦻ F, 3) the hull of temma is very fine, with a rather small value of Cb, 4) the line of KM on the hydrostatic curves sharply bends at the draft near the chine.
  • 森田 知治
    原稿種別: 本文
    1976 年 56 巻 p. 69-76
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    The stability of patrol boats, surveying ships and lighthouse tenders which belong to Maritime Safety Agency are compared to that of small passenger ships. The considerable differences in stability characteristics of those ships are that the Maritime Safety Agency ships have the larger freeboad, the wider range of stability and the lower height of center of gravity. Boundary zone of GM/B and line of GZ_m with which one can roughly judge that a ship has C-value greater than one are obtained. The following empilical formula to estimate GZ_m is obtained. GZ_m/B=0, 431(GM/B)-0.177(KG/D^^^)+0.1(D^^^/B)+0.06(f_e/D^^^)+0.115C_b(WL)-0.018
  • 西ノ首 英之, 川島 利兵衛
    原稿種別: 本文
    1976 年 56 巻 p. 77-89
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    冬期東シナ海という限られた時期と海域における漁船の操業中の船体応答運動のうち,roll.およびpitch.についてスペクトル解析により周波数応答特性について考察し次の知見を得た。(1)roll.応答運動の周期は,波浪との相対針路および出合い周期に関係なく船の固有周期に等しい。(2)操業中における漁船の波浪を入力としたroll.応答の線形性はhead seaでは悪いが他の針路では良好である。(3)roll.応答のamp. gain (deg/m)は相対針路により異なり,最も高いのはquarteringおよび,following seaで次いでbeam seaであった。スペクトラムの卓越した周期T_<02>(ゼロクロス周期)におけるamp. gainの平均値は前報での応答の短期予測に用いた回帰方程式の回帰係数とほぼ一致し,周波数領域からの考察によっても応答の平均値は定量的に予測が可能となった事が確認できた。(4)roll.応答の位相特性は,波高計測処理時の積分回路およびフィルターの位相誤差が若干あるが,傾向としては,横および前方からの波浪に対しては遅れ,後方からの波浪に対しては,わずか進む事が認められた。(5)pitch.の応答周期は波浪の出合い周期によく一致しており,その周期におけるコヒーレンシイも高く線形性が認められた。(6)pitch.応答周期にはroll.周期が現われその明りょうな針路は,bow seaである。(7)しかし,amp. gainの絶対値は小さくbeam seaでは1.7(deg/m)でほとんど有意性は無視してよいと考える。最も大きい針路はfollowing seaの4.2(deg/m)で次いでhead sea (2.9)であった。(8)位相特性については,スペクトラムの卓越周期帯域では誤差も考慮する必要があるが全ての針路で進んだ傾向が認められた。(9)amp. gainの絶対値は小さいがroll.応答と同様,平均値としては回帰係数と一致し,定量的に予測は可能と考えられる。(10)今後の問題点として,操業中の耐航性という事から漁具との関係,とりわけワープ張力の影響について検討する必要がある。(11)最後にコレプログラムについては論じなかったが,スペクトル解析は応答特性について多くの構造的情報が得られ,有効な手法である事が確認できた。
  • 西ノ首 英之, 川島 利兵衛
    原稿種別: 本文
    1976 年 56 巻 p. 91-100
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    Heaveおよび舷側における相対波高について,前報(IV)と同様スペクトル解析を行ない,周波数応答について次の知見を得た。(1)相対波高とheaveのamp. gainは周波数軸上で反比例の関係にある。すなわち4〜5秒を境にして長周期域でheaveのamp. gainは高く,相対波高は低い。短周期域では逆にheave応答は低く,相対波高が高い。(2)Heave応答の周期は出合い波周期に全ての針路で一致し,amp. gainも長周期域で0.8〜1.0 (m/m)と高く,ほとんど波高に等しく追従して上下動している。(3)本供試船(195GT)の曳網操業状態に対してheave応答を生じさせる有義波高は大略1m以上でまた波周期は4〜5秒以上の波浪である。(4)Heave応答の波浪に対する位相シフトは全ての相対針路にわたりほぼゼロと考察された。(5)相対波高すなわち船体中央部乾舷の変動は,船体運動特にroll運動によるものと波浪との出合いによるものと二つに大別される。パワースペクトラムにピークの山が二つあり,一つは船体運動周期(6〜7.5秒)に,他は波浪周期および波浪が船体に当り砕波したときの周期(3〜4秒以下)に一致している。(6)相対波高のamp. gain特性から甲板上に海水打込みが生じる波高を定量的に予測した。すなわち最も起り易い針路はfollowing seaで約1.8m(海況4)以上の波浪,最も起り難いのはhead seaで大略2.6m(海況5)以上の波浪である。(7)相対波高の位相特性はbeam sea,quartering sea,およびfollowing seaで30〜40度の進み特性である。この事は海水打込み現象がroll応答より前に発生する事を示し,追い波状態で多発している転覆事故の誘因となる事を意味すると考える。
  • 小林 弘明, 遠藤 真
    原稿種別: 本文
    1976 年 56 巻 p. 101-109
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    As a basic study on the marine traffic control and development of navigation system, we must know real manouevering of ships. Using by Ship Manouevering Simulator, authors have studied the handling of collision avoidance which is one of man-machine system's problems. We have made out the following matter through the simulator study under the variable conditions of encounters between ships. In the first place, navigator makes judgement value in accordance with control object, and then he begins to control when its value reaches to the threshold value. We have given the collision judgement value in formular (2-3) We have made out that the threshold value depends on the manoueverability of ship and sea traffic condition of her surroundings.
  • 田中 健一, 山田 一成
    原稿種別: 本文
    1976 年 56 巻 p. 111-119
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    A trial of the simulation for a restricted water area was made using a marine traffic control simulator with the closed loop system containing human oprators introduced previously. In the Kawasaki District of Keihin Harbour, the operation started in 1973, in which the marine traffic has been centrally controlled by a control officer with the signal lights, and the preferential passage has been allowed for the large vessels. This district was chosen as a model area in this study. The series of simulations was successively processed without a serious trouble. The influence of the traffic volume under the operation of the signal control on traffic performances statistics such as average travel times, waiting times and collision rates of ships, etc., was clarified by the simulation. In conclusion, it seems that the simulator is available as a tool for solving marine traffic problems.
  • 山田 猛敏, 西山 安武, 杉崎 昭生
    原稿種別: 本文
    1976 年 56 巻 p. 121-130
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    The purpose of this study is to rationalize the total physical distribution system of container cargoes and documents from shipper to container yard and the authors built the system model and simulated making use of computer. The system model consists of 4 inland routes, shipper, forwarder, CFS, customs and container yard. And the weighted time of cargoes and documents on total system were calcuated and finally cost-benefit analysis of cargo transportation system connected with information system were examined. The results of study were as follows: (1) The direct route of shipper's package from shipper to container yard is the most effectively. (2) The time lag due to the generation of cargo and document should be kept small and document should be generated prior to cargo preferably. (3) The ability of tandem processing stages should be kept over 1.6 times of in-put volume. In this case, the utilization factor of stages will be less than 0.6. And well-bellanced total optimization should be taken into consideration. (4) The accelerated processing works of cargo and document are necessary when the ability of processing system is low level. (5) The large scale information system of transportation should be established based on the result of cost-benefit analysis.
  • 橋本 進, 松田 広久, 大西 典一, 山本 訓三
    原稿種別: 本文
    1976 年 56 巻 p. 131-138
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    This paper is, to study navigators' vistual acuity, the result of investigation on cadets on training ships. Weak sighters are obviously inferior to normal ones in looking out, star finding etc. It requires further examination on training method for them and development of instruments need for sighting. We present some improvement of instruments as shown in fig.5.
  • 藤井 忍, 小黒 英男
    原稿種別: 本文
    1976 年 56 巻 p. 139-146
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    This study was undertaken to show seamen respond to noise and vibration. If we define "acceptable value" as the level that just a half persons of the subjects evaluate the noise and vibration "considerbly". The results are summarized as follows: 1) The acceptable value of noise is 60-65dB (A) in cabins, and 65-75dB (A) in the working areas. 2) The acceptable value of vibration is 70-80dB (VL) in both cabins and working areas.
  • 天下井 清, 川島 利兵衛
    原稿種別: 本文
    1976 年 56 巻 p. 147-154
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
    Based on the reports of the investigation of the smaller fishing boats under 10 gross tons along the coast of Hokkaido, in which the triangulation method was used in the measurement of the ship's body plans as described in the former paper, the authors have been studying the stability of the small fishing boats theoretically. The theoretical stability criteria of fishing boats in general was applied on fishing boats under 10 gross tons and analized using their measured rolling periods and metacentric heights. The results presented in Fig.7 showed that these fishing boats less than 10 gross tons are on the safety side of the critical curves under their practical conditions.
  • 原稿種別: 付録等
    1976 年 56 巻 p. App2-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 付録等
    1976 年 56 巻 p. App3-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 付録等
    1976 年 56 巻 p. App4-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 表紙
    1976 年 56 巻 p. Cover3-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
  • 原稿種別: 表紙
    1976 年 56 巻 p. Cover4-
    発行日: 1976/12/25
    公開日: 2017/01/15
    ジャーナル フリー
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