Comparison of trajectories, δ-r' curves and time histories in turning motion and z test
Ship K with ballast even keel condition at 10/10 zigzag test is shown in Fig. 14 and at 20/20 zigzag test is shown in Fig.15. There seems good agreement between predicted and measured results, including the shape of the curve.
Fig.16 and Fig.17 are predicted and measured results in the case of higher speed condition at Fn=0.156, as for Ship E with ballast 1% trim condition. Fig.16 and Fig.17 are same condition with Fig.2(iii) and Fig.3(iii) at Fn=0.059, except Fn. It seems that numerical simulations can represent the difference of the initial ship speed well.
Fig.18 shows the results of different ship speed. Fig.18(a) shows the initial speed has much effect on advance. Fig.18(c) shows the initial speed has much effect on the first overshoot angle in zigzag motion.
4. CONCLUDING REMARKS
We proposed approximate formulae for estimating the coefficients of hydrodynamic forces acting on ship. According to numerical simulation by using the approximate formulae, close agreement between calculated and measured results was obtained. The approximate formulae would be useful to predict manoeuvring performance at the design stage from practical points of view.
 Kijima, K., Katsuno, T., Nakiri, Y. and Furukawa, Y., "On the Manoeuvring Performance of a Ship with the Parameter of Loading Condition", Journal of the Society of Naval Architects of Japan, Vol.168, pp.141-148, 1990
 Kijima, K., Nakiri, Y., Furukawa, Y., Hori, T. and Aoki, I., "On a Study for Influence of Loading Condition on a Prediction of Ship Manoeuvrability", Transaction of West-Japan Society of Naval Architects, No.89, pp.155-166, 1995 (In Japanese).
 Mori, M., "A Note on Hull Form Design (Part 24)", Journal of Ship Science, Vol.48, pp.40-49, 1995 (In Japanese).
 Yoshimura, Y., Ishiguro, T. and Tanaka, S., "A Study on the Accuracy of the Recent Prediction Technique of Ship's Manoeuvrability", Proceedings of MARSIM '96,pp.547-561, 1996
1967 Bachelor of Naval architecture in Kyushu University
1969 Master of Naval architecture in Kyushu University
1972 Lecturer in Kyushu University
1974 Doctor of Naval architecture Assistant professor in Kyushu University
1986 Professor in Kyushu University
1987-1996 Member of ITTC Manoeuvring Committee
1993 Chairman of IMO DE Ad. working group
1993-1996 Chairman of ITTC Manoeuvrability Committee
1999-2003 President of West Japan Society of Naval Architects
2002-2003 Chairman of JTTC
1970-2003 Technical Assistant of Naval architecture in Kyushu University