ケーブル布設船の針路保持に関する研究(第二報)

概要

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In the first report, the effects of water depth, soil conditions of sea bed and length of tow line on the course stability of a cable ship were discussed. By the numerical calculations, it was found that a cable ship was stable as soil of sea bed becoming hard, as increasing length of tow line and as increasing depth of water. In this report, the effects of external disturbances such as wind and current on the course stability of a cable ship are discussed. This cable ship is controlled by rudder to keep her course during laying and burying of the submarine cable by means of a plough, and furthermore is controlled as the function of heading angle, angular velocity of a cable ship and towing angle, which means a horizontal angle between tow line of a plough burying machine and the designed submarine cable route. As the results of numerical calculations, we get the following conclusions. (1) The towing angle is one of the effective parameter to keep her on the designed submarine cable route. (2) It will be very useful to pick this parameter up towards the practical design for automatic track-keeping control system of a cable ship. (3) As the soil conditions of sea bed becoming hard, it will be becoming difficult to control a cable ship by rudder, because the course stability of a ship will be affected by the external disturbances such as wind and current as decreasing ship speed.
社団法人日本船舶海洋工学会の論文
1989-08-25