風圧下での高速曳航いけすの針路安定性能

抄録

The high-speed-towed fish preserve is a new type vessel about 15.6 m long with a fish preserve capacity of 200 m^3. The vessel is supposed to be towed efficiently with a lighter draft (about 0.8m) at a maximum speed of about 10 knots (Fn=0.42). The lateral area ratio between a super structure and a hull is about 5.3 in a lighter draft. The course stability of the vessel might be affected by the wind forces and wave forces. Especially the wind forces are stronger than wave forces in a lighter draft. In this paper, we present the course stability characteristics of the towed fish preserve with wind forces in a lighter draft. We conducted the model experiment tests in a wind tunnel and in a circular tank. The model scales are 1/55^<th> (0.284 m) for the wind tunnel and 1/25^<th> (0.624 m) for the circular tank. Also we performed the simulation studies to investigate the course stability for our mathematical mode. The results of our experiments and simulation studies are described and discussed.