|
Fig. 4 Influence of propulsion on the sinkage, trim, and squat
(a) |
Comparison of the measured sinkage from resistance and self-propulsion tests |
(b) |
Comparison of the measured trim from resistance and self-propulsion tests |
(c) |
Comparison of the computed squat with the measured one from resistance and self-propulsion tests |
To demonstrate the influence of the tank width on the squat, Fig. 6 shows the computed sinkage as the tank width of the VBD has the doubled and four-times width for the subject inland vessel, compared with the asymptotic solution without sidewalls. Numerically, it means there is an open boundary on the side-truncation. As expected, the wider the channel is, the larger the sinkage. However, it can be observed, as the width has doubled to the tank width 9.81 m of the VBD, no sidewall-effect can be observed. The systematical convergence of the sinkage from a finite width to the infinite one implies again the reliability of the computation method presented here.
Fig.5 |
Comparison of the measured, computed, and empirically calculated squat for a sea ship in shallow water of three depths |
|
