Fast Prediction for Roll Motion of a Damaged Ship Based on SVR

doi:10.16183/j.cnki.jsjtu.2023.431

Abstract

Abstract:

ANSYS-AQWA is applied to analyze the rolling motion response of the damaged ship DTMB5415 under various working conditions. The results are compared with those in exiting literature to validate the practicality of the hydrodynamic model. Additionly, the rolling motion response database for the damaged ship is constructed. The support vector regression (SVR) algorithm is used to model the rolling motion database for identification, exploring the relationship between the operating condition factors and coefficients in the equation of roll motion. Finally, a fast prediction model for rolling motion is constructed and validated, offering a significant improvement in the prediction efficiency compared with traditional computational fluid dynamics models.

Key words: fast prediction, support vector regression (SVR), damaged ship, rolling motion

CLC Number:

U661

LIU Han, SU Yan, ZHANG Guoqiang. Fast Prediction for Roll Motion of a Damaged Ship Based on SVR[J]. Journal of Shanghai Jiao Tong University, 2025, 59(7): 1041-1049.

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参数	实船数据	参数	实船数据
总长,L_OA/m	153.3	棱形系数,C_P	0.616
垂线间长,L_PP/m	142.2	中横剖面系数,C_M	0.815
设计水线宽,B_WL/m	19.082	重心纵向位置,L_CG/m	70.137
型深,D/m	12.47	横摇惯性半径,K_xx/m	6.932
吃水,d/m	6.15	纵摇惯性半径,K_yy/m	36.802
排水量,Δ/t	8635	艏摇惯性半径,K_zz/m	36.802
方形系数,C_B	0.505

组别	工况			超参数
组别	H/m	T/s	β/rad	BoxConstraint	KernelScale	Epsilon
1	1	7	0	957.411 1	39.963 6	0.000 5
2	1	8	0	80.412 5	3.440 8	0.003 5
3	1	9	π/4	391.721 7	31.774 4	0.003 2
4	1	10	π/4	863.240 9	560.921 6	0.001 3
5	1	9	π/2	692.254 4	16.115 8	0.000 9
6	1.5	6	π/4	998.172 2	78.043 7	0.006 9
7	1.5	9	π	593.945 7	51.515 5	0.000 4
8	1.5	10	π	876.905 7	850.494 3	0.055 9

组别	工况			辨识建模结果
组别	H/m	T/s	β/rad	d₁	d₃	r₁	r₃	f₄₁	f₄₂
1	1	7	0	0.099 9	0.003 1	0.056 9	0.007 6	-0.159 1	0.283 3
2	1	8	0	0.099 4	0.001 9	0.066 2	-0.001 3	-0.352 3	0.128 8
3	1	9	π/4	0.118 5	0.000 0	0.067 2	0.000 0	-0.634 8	0.719 7
4	1	10	π/4	0.071 6	0.000 0	0.061 6	0.000 0	-0.572 1	1.192 8
5	1	9	π/2	0.021 2	0.000 0	0.042 0	0.001 4	1.279 9	1.522 9
6	1.5	6	π/4	0.404 3	-0.003 2	0.105 8	-0.000 8	-0.202 9	1.428 4
7	1.5	9	π	0.076 7	0.000 1	0.063 4	0.000 0	-0.473 7	-0.405 6
8	1.5	10	π	0.074 1	0.000 0	0.056 5	0.000 0	-0.821 0	-0.590 9