Low-noise optimization design for underwater series-connected multi-sphere composite shell structure

Table 1. Parameters of different structure
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Table 1. Parameters of different structure
部位外直径/mm 厚度/mm 长度/mm
球壳 2 200 30
柱壳 556 27 740
圆弧 224 46

Table 2. Total vibration velocity levels of series-connected multi-sphere composite shell with different grid sizes
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Table 2. Total vibration velocity levels of series-connected multi-sphere composite shell with different grid sizes
网格大小
30 mm 60 mm 120 mm
单元数 57 276 15 145 5 152
节点数 57 255 15 132 5 136
振动速度总级/dB 102.03 102.30 102.15

Table 3. Design variables and their ranges of values
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Table 3. Design variables and their ranges of values
变量初始值/mm 最小值/mm 最大值/mm
圆柱厚度 27 17 36
圆弧厚度 46 45 64
圆柱半径 278 266 323
圆弧半径 66 34 72
圆柱长度 740 600 980

Table 4. Uniform experimental design scheme

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Table 4. Uniform experimental design scheme

组号	因素1	因素2	因素3	因素4	因素5	W
1	17	48	293	58	900	86.21
2	18	52	323	42	800	86.00
3	19	56	290	68	700	86.26
4	20	60	320	52	600	85.54
5	21	64	287	36	920	86.20
6	22	47	317	62	820	85.97
7	23	51	284	46	720	86.36
8	24	55	314	72	620	85.67
9	25	59	281	56	940	86.28
10	26	63	311	40	840	84.16
11	27	46	278	66	740	86.37
12	28	50	308	50	640	86.05
13	29	54	275	34	960	85.97
14	30	58	305	60	860	86.36
15	31	62	272	44	760	86.08
16	32	45	302	70	660	85.87
17	33	49	269	54	980	86.35
18	34	53	299	38	880	86.02
19	35	57	266	64	780	84.10
20	36	61	296	48	680	86.53

Table 5. Optimization design parameter table
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Table 5. Optimization design parameter table
优化设计参数因素初始值第1组第2组第3组
圆柱厚度/mm 1 27 20 30 29
圆弧厚度/mm 2 46 45 55 48
圆柱半径/mm 3 278 320 290 311
圆弧半径/mm 4 66 67 47 49
圆柱长度/mm 5 740 800 600 660

Table 6. Comparison of optimization results
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Table 6. Comparison of optimization results
水下辐射声功率总级第1组第2组第3组
预测值/dB 81.73 82.19 82.71
实际值/dB 83.45 83.72 84.31
误差/% 2.06 1.83 1.90

Table 7. Comparison of total radiated sound pressure levels
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Table 7. Comparison of total radiated sound pressure levels
测点实测声压总级/dB 仿真声压总级/dB 差值/dB
1 79.65 78.13 1.52
2 73.43 74.57 1.14

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Hefan LI, Guanjun ZHANG, Yuzhao KE. Low-noise optimization design for underwater series-connected multi-sphere composite shell structure[J]. Chinese Journal of Ship Research, 2025, 20(3): 118

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