Numerical simulation analysis on hydrodynamic performance of platform with string-type mooring system

参数	数值
船长/m	120
水线长/m	115
型宽/m	30
型深/m	16
吃水/m	8
排水量/t	24 347
重心纵向位置(距艉垂线) /m	54
重心垂向位置(距基线) /m	11
横摇惯性半径/m	11
纵摇惯性半径/m	28.75
转艏惯性半径/m	28.75

Table 2. Parameters of wharf and tide level
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Table 2. Parameters of wharf and tide level
参数数值
潮差/m 2.5
最低潮位/m 9.6
码头面高程/m 14.1
护舷间隙/m 1

Table 3. Tide level conditions
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Table 3. Tide level conditions
潮位水深/m
最高 12.1
3/4 11.475
1/2 10.85
1/4 10.225
最低 9.6

Table 4. Environmental parameters of wind and wave
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Table 4. Environmental parameters of wind and wave
参数数值
有义波高/m 3.47
周期/s 6.02
谱峰周期/s 7.83
浪向角/(°) 90

Table 5. Wind load conditions
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Table 5. Wind load conditions
风向/(°) 风速/(m·s⁻¹) 类型
0 28 定常风
45 28 定常风
90 28 定常风
135 28 定常风
180 28 定常风
225 28 定常风
270 28 定常风
315 28 定常风

Table 6. Main dimensions of the FPSO verification model

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Table 6. Main dimensions of the FPSO verification model

参数	数值
垂线间长/m	285
船宽/m	63
吃水/m	13
排水量/t	225 518
重心纵向位置(距艉垂线)/m	142.5
重心垂向位置(距基线)/m	16.5
横摇惯性半径/m	19.45
纵摇惯性半径/m	71.25
艏摇惯性半径/m	71.25

Table 7. RAO peaks of the moored platform with various grid sizes
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Table 7. RAO peaks of the moored platform with various grid sizes
网格尺寸/m 横摇RAO峰值/(°) 横荡RAO峰值/m 升沉RAO峰值/m
2.3 8.70 4.35 1.40
1.8 8.74 4.35 1.40
1.2 8.82 4.35 1.40
0.9 8.82 4.35 1.40

Table 8. Mean values of motion response of the moored platform at different time steps
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Table 8. Mean values of motion response of the moored platform at different time steps
时间步长/s 横摇均值/(°) 横荡均值/m 升沉均值/m
0.05 −0.24 −0.82 0.06
0.10 −0.24 −0.82 0.06
0.20 −0.23 −0.81 0.04

Table 9. Six-DOF motion range statistics of the moored platform at different tide levels

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Table 9. Six-DOF motion range statistics of the moored platform at different tide levels

潮位	缆绳系泊						弦式系泊
潮位	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m
最高	16.73	1.03	2.10	1.18	2.94	3.65	14.44	0.61	2.65	1.99	4.18	3.54
3/4	16.32	0.94	2.08	1.17	3.09	3.29	12.66	0.49	2.72	2.16	4.44	3.27
1/2	17.59	0.83	2.25	1.27	3.35	2.91	11.17	0.45	2.94	2.41	4.57	2.90
1/4	17.05	0.75	2.22	1.33	3.33	2.46	9.23	0.52	2.62	2.38	4.49	2.44
最低	15.63	0.64	2.27	1.29	3.34	1.92	7.57	0.57	2.48	2.32	4.32	1.90

Table 10. Maximum value statistics of six-DOF motion limit of the moored platform at different tide levels

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Table 10. Maximum value statistics of six-DOF motion limit of the moored platform at different tide levels

潮位	运动方向	缆绳系泊						弦式系泊
潮位	运动方向	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m
最高	正向	1.29	0.45	1.11	0.75	0.57	1.54	6.33	0.25	1.20	0.93	0.55	1.84
最高	负向	−15.44	−0.57	−0.99	−0.43	−2.37	−2.11	−8.10	−0.36	−1.44	−1.06	−3.62	−1.70
3/4	正向	1.41	0.39	1.13	0.71	0.56	1.36	5.53	0.19	1.31	1.00	0.55	1.66
3/4	负向	−14.91	−0.55	−0.95	−0.46	−2.52	−1.92	−7.13	−0.30	−1.41	−1.15	−3.89	−1.61
1/2	正向	1.96	0.33	1.28	0.73	0.57	1.20	4.89	0.18	1.44	1.09	0.56	1.42
1/2	负向	−15.64	−0.50	−0.98	−0.53	−2.78	−1.71	−6.29	−0.27	−1.50	−1.32	−4.02	−1.48
1/4	正向	2.67	0.30	1.26	0.76	0.56	1.02	3.91	0.21	1.27	1.06	0.56	1.13
1/4	负向	−14.38	−0.45	−0.96	−0.57	−2.77	−1.45	−5.32	−0.30	−1.35	−1.32	−3.93	−1.31
最低	正向	3.07	0.28	1.29	0.67	0.56	0.77	3.12	0.22	1.18	1.06	0.59	0.87
最低	负向	−12.57	−0.36	−0.98	−0.62	−2.79	−1.15	−4.44	−0.35	−1.30	−1.26	−3.73	−1.03

Table 11. Mean value statistics of six-DOF motion response of the moored platform at different tide levels

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Table 11. Mean value statistics of six-DOF motion response of the moored platform at different tide levels

潮位	缆绳系泊						弦式系泊
潮位	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m
最高	−4.35	−0.02	−0.01	0.08	−0.42	−0.05	−0.36	−0.03	−0.06	−0.08	−0.96	0.07
3/4	−3.84	−0.02	0.00	0.07	−0.44	−0.05	−0.36	−0.03	−0.05	−0.09	−1.07	0.06
1/2	−3.33	−0.02	−0.01	0.08	−0.49	−0.04	−0.39	−0.03	−0.04	−0.08	−1.14	0.05
1/4	−2.83	−0.02	−0.01	0.09	−0.51	−0.03	−0.44	−0.02	−0.02	−0.06	−1.16	0.05
最低	−2.33	−0.02	0.00	0.08	−0.52	−0.03	−0.51	−0.02	0.00	−0.03	−1.12	0.04

Table 12. Six-DOF motion range statistics of the moored platform in each wind direction

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Table 12. Six-DOF motion range statistics of the moored platform in each wind direction

风向/(°)	弦式系泊						缆绳系泊
风向/(°)	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m
无风	14.438	0.607	2.649	1.988	4.177	3.540	16.730	1.028	2.099	1.180	2.943	3.651
0	14.550	0.628	2.651	2.026	4.168	3.536	16.458	1.069	2.124	1.122	2.941	3.647
45	14.970	0.606	2.547	2.067	4.149	3.531	16.390	1.042	2.169	1.121	2.987	3.632
90	14.668	0.589	2.446	2.028	4.143	3.533	16.504	1.001	2.110	1.073	3.089	3.624
135	14.393	0.589	2.456	2.061	4.143	3.546	16.854	0.989	2.077	1.133	2.930	3.638
180	14.561	0.587	2.578	1.957	4.165	3.557	16.742	0.979	2.022	1.176	2.943	3.650
225	14.065	0.588	2.595	2.079	4.184	3.555	16.931	0.980	1.954	1.149	2.971	3.665
270	14.008	0.599	2.689	2.116	4.193	3.555	16.861	1.004	1.945	1.153	2.972	3.668
315	14.151	0.614	2.601	2.225	4.182	3.549	16.830	1.036	1.987	1.139	2.952	3.664

Table 13. Mean value statistics of six-DOF motion response of the moored platform in each wind direction

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Table 13. Mean value statistics of six-DOF motion response of the moored platform in each wind direction

风向/(°)	弦式系泊						缆绳系泊
风向/(°)	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m	横摇/(°)	纵摇/(°)	转艏/(°)	纵荡/m	横荡/m	升沉/m
无风	−0.358	−0.032	−0.056	−0.080	−0.961	0.071	−4.346	−0.025	−0.006	0.077	−0.417	−0.050
0	−0.353	−0.033	−0.042	0.001	−0.959	0.071	−4.352	−0.027	−0.026	0.116	−0.416	−0.050
45	−0.350	−0.033	−0.050	−0.022	−0.923	0.070	−4.263	−0.027	−0.019	0.104	−0.398	−0.050
90	−0.348	−0.032	−0.062	−0.084	−0.906	0.069	−4.216	−0.026	−0.004	0.076	−0.390	−0.049
135	−0.349	−0.031	−0.066	−0.138	−0.921	0.070	−4.241	−0.024	0.009	0.049	−0.397	−0.050
180	−0.354	−0.031	−0.066	−0.159	−0.959	0.072	−4.340	−0.022	0.014	0.038	−0.417	−0.050
225	−0.359	−0.031	−0.058	−0.130	−0.990	0.073	−4.453	−0.022	0.006	0.049	−0.438	−0.051
270	−0.360	−0.031	−0.047	−0.072	−1.002	0.073	−4.507	−0.024	−0.009	0.077	−0.448	−0.052
315	−0.358	−0.032	−0.040	−0.019	−0.990	0.072	−4.472	−0.026	−0.022	0.104	−0.439	−0.051

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Chong FU, Liuqun ZHAO, Lei SUN. Numerical simulation analysis on hydrodynamic performance of platform with string-type mooring system[J]. Chinese Journal of Ship Research, 2022, 17(6): 193

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Paper Information

Category: Ship Design and Performance

Received: Apr. 1, 2021

Accepted: --

Published Online: Mar. 26, 2025

The Author Email:

DOI:10.19693/j.issn.1673-3185.02338

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Parameters of the mooring platform

Table 1. Parameters of the mooring platform

Table 2. Parameters of wharf and tide level

Table 2. Parameters of wharf and tide level

Table 3. Tide level conditions

Table 3. Tide level conditions

Table 4. Environmental parameters of wind and wave

Table 4. Environmental parameters of wind and wave

Table 5. Wind load conditions

Table 5. Wind load conditions

Table 6. Main dimensions of the FPSO verification model

Table 6. Main dimensions of the FPSO verification model

Table 7. RAO peaks of the moored platform with various grid sizes

Table 7. RAO peaks of the moored platform with various grid sizes

Table 8. Mean values of motion response of the moored platform at different time steps

Table 8. Mean values of motion response of the moored platform at different time steps

Table 9. Six-DOF motion range statistics of the moored platform at different tide levels

Table 9. Six-DOF motion range statistics of the moored platform at different tide levels

Table 10. Maximum value statistics of six-DOF motion limit of the moored platform at different tide levels

Table 10. Maximum value statistics of six-DOF motion limit of the moored platform at different tide levels

Table 11. Mean value statistics of six-DOF motion response of the moored platform at different tide levels

Table 11. Mean value statistics of six-DOF motion response of the moored platform at different tide levels

Table 12. Six-DOF motion range statistics of the moored platform in each wind direction

Table 12. Six-DOF motion range statistics of the moored platform in each wind direction

Table 13. Mean value statistics of six-DOF motion response of the moored platform in each wind direction

Table 13. Mean value statistics of six-DOF motion response of the moored platform in each wind direction