On the Characteristics of the Roll Motion for Small Fishing Vessels with Angle-Dependent Damping

Abstract

The previous paper which we reported before described a kind of damping function in the equa − tion of single degree of freedom rolling motion which applicable to s 皿 all fishing vesselsc1) ． There is no problem in the application of the damping function to the free rol ！ motion in the ab −

Estimation of coefficients of the equation of nonlinear roll motion for fishing boats by improved energy method and genetic algorithm

“…However, applying the equations listed above to the traditional Japanese small fishing boat, which has a non-smooth cross-sectional hull form, is difficult. As a result, the following form has been proposed as an additional empirical formula [16]. b2I I^6…”

“…The rolling of the small fishing boat is unique, as a consequence of the hull shape. Therefore, for this problem, the special roll damping moment function for the small fishing boat, has been proposed as an empirical formula after much trial and error [16]. However, estimating the coefficients of such a special roll damping moment function is very difficult.…”