Hydrodynamic coefficients identification of ship simplified modular model based on support vector regression

Table 1. Parameters of waterjet propulsion vessel
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Table 1. Parameters of waterjet propulsion vessel
参数数值
船长L/m 9.8
船宽B/m 3.17
方形系数C_b 0.251
平均吃水d/m 0.71
质量m/kg 5 540

Table 2. Identification results of parameters by using SVR

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Table 2. Identification results of parameters by using SVR

	水动力系数	CFD试验值	原始模型辨识值	改进模型辨识值
纵向水动力系数	$ X_{uu} $	−0.031 25	−0.030 2	−0.031 4
	$ X_{vv} $	0.046 57	0.069 3	0.047 0
	$ X_{rr} $	0.004 14	0.027 7	0.003 1
横向水动力系数	$ Y_v $	−0.276 70	−0.030 9	−0.253 4
	$ Y_r $	0.088 11	0.092 0	0.086 1
	$ Y_{vv} $	−1.007 40	−0.086 0	0.608 3
	$ Y_{vr} $	−0.164 37	−0.015 1	−0.033 1
	$ Y_{rr} $	−0.070 20	−0.097 3	−0.069 9
转艏水动力系数	$ N_v $	0.170 80	0.150 6	0.170 1
	$ N_r $	−0.052 40	−0.051 1	−0.052 1
	$ N_{rr} $	−0.043 50	−0.041 4	−0.043 0

Table 3. Condition numbers of correlation coeffcient matrix
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Table 3. Condition numbers of correlation coeffcient matrix
运动方程条件数
横向 50.189
纵向 7 737.52
转艏 6 352.2

Table 4. Prediction accuracy of experiments
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Table 4. Prediction accuracy of experiments
连续Z形试验 35°/35° Z形试验 35°回转试验
$RMSE$ u 0.018 9 0.033 5 0.016 4
v 0.009 0 0.085 3 0.015 1
r 0.008 9 0.095 7 0.002 3
$ CC $ u 0.989 0 0.985 3 0.999 7
v 0.994 7 0.994 1 0.998 4
r 0.995 5 0.993 8 0.999 6

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Lifei SONG, Yuqing WANG, Wei PENG, Peiyong LI, Yushan LIu, Yongfeng ZHANG. Hydrodynamic coefficients identification of ship simplified modular model based on support vector regression[J]. Chinese Journal of Ship Research, 2025, 20(1): 65

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