道糸張力から推定した潜航板の運動軌跡

抄録

The experiments were conducted using a circulating water chamel in order to clarify the characteristic movement of the trolling depressor. A three component load cell measured the tension of the line from the trolling depressor. The length of the line and the flow speed were changed between 0.5m and 1.4m, and 0.4m/s and 1.6 m/s, respectively. The movement of the trolling depressor was recorded through CCD cameras onto videotapes. The three component displacement of the point where the line was knotted to the trolling depressor was estimated by the tension of the line. The periods of the x and z component's displacement were similar and about 0.4 seconds. The period of the y component's displacement was about 0.8 seconds and twice as long as that of the x and z component's. It was clear that the locus of the point where the trolling depressor was knotted was similar to the number '8' on thexy, yz and xz planes.