Optimization Design Method of the Supercavitating Projectile Based on BP Neural Network

doi:10.12382/bgxb.2024.0496

Abstract

Abstract:

Effective range is one of the most important performance indexes of supercavitating projectiles, which is influenced by the coupling of shape and weight parameters. In order to increase the effective range of supercavitating projectile, a numerical model for calculating the effective range of supercavitating projectiles is established, and a combination of four factors and five levels is designed according to the principle of orthogonal test design. The effective range data set of supercavitating projectiles under the influence of shape and weight parameters is obtained by simulation calculation, and an optimization method of design parameters of supercavitating projectiles is established by using BP(back propagation) neural network method and genetic algorithm, and the maximum effective range of supercavitating projectile and its corresponding shape and weight parameters are obtained. The results show that the underwater trajectory of supercavitating projectile has a stable tail beat characteristic. The mass has the greatest impact on the effective range through range analysis In the absence of precise mathematical model, the accuracy of the effective range prediction model trained by BP neural network based on limited data points is high with the average error of 0.735%. The optimal range of the whole domain under the influence of four-factors coupling is obtained by genetic algorithm. The range is improved by 5.01% compared with the best result of data set, and by 1.95% compared with the result of orthogonal optimization. The research results can providereference for the overall design of supercavitating projectile.

Key words: supercavitating projectile, orthogonal test, BP neural network, genetic algorithm

CLC Number:

GONG Shilong, DANG Jianjun, LI Shaoxing, HUANG Chuang. Optimization Design Method of the Supercavitating Projectile Based on BP Neural Network[J]. Acta Armamentarii, 2025, 46(5): 240496-.

Figures/Tables 18

References 23

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水平	D_n/mm	L_t/mm	G/kg	J_z/(kg·mm²)
1	5.00	30	0.753	3364.1
2	5.25	27	0.828	3700.5
3	5.50	33	0.903	4036.9
4	5.75	36	0.668	3027.7
5	6.00	39	0.593	2691.3

水平	D_n/mm	L_t/mm	G/kg	J_z/(kg·mm²)
1	5.00	30	0.753	3364.1
2	5.25	27	0.828	3700.5
3	5.50	33	0.903	4036.9
4	5.75	36	0.668	3027.7
5	6.00	39	0.593	2691.3

编号	序列	初始速度 v₀/(m·s^-1)	剩余速度 v_r/(m·s^-1)	有效射程 L_r/m
1	A1B1C1D1	320	200	49.73
2	A1B2C2D2	305	191	51.27
3	A1B3C3D3	292	182	53.30
4	A1B4C4D4	340	212	47.23
5	A1B5C5D5	360	225	44.19
6	A2B1C2D3	305	191	52.99
7	A2B2C3D4	292	182	51.67
8	A2B3C4D5	340	212	45.49
9	A2B4C5D1	360	225	44.88
10	A2B5C1D2	320	200	53.75
11	A3B1C3D5	292	182	54.26
12	A3B2C4D1	340	212	45.38
13	A3B3C5D2	360	225	44.35
14	A3B4C1D3	320	200	48.26
15	A3B5C2D4	305	191	51.64
16	A4B1C4D2	340	212	44.86
17	A4B2C5D3	360	225	40.96
18	A4B3C1D4	320	200	47.05
19	A4B4C2D5	305	191	49.68
20	A4B5C3D1	292	182	53.62
21	A5B1C5D4	360	225	37.49
22	A5B2C1D5	320	200	43.25
23	A5B3C2D1	305	191	49.59
24	A5B4C3D2	292	182	52.33
25	A5B5C4D3	340	212	45.38

编号	序列	初始速度 v₀/(m·s^-1)	剩余速度 v_r/(m·s^-1)	有效射程 L_r/m
1	A1B1C1D1	320	200	49.73
2	A1B2C2D2	305	191	51.27
3	A1B3C3D3	292	182	53.30
4	A1B4C4D4	340	212	47.23
5	A1B5C5D5	360	225	44.19
6	A2B1C2D3	305	191	52.99
7	A2B2C3D4	292	182	51.67
8	A2B3C4D5	340	212	45.49
9	A2B4C5D1	360	225	44.88
10	A2B5C1D2	320	200	53.75
11	A3B1C3D5	292	182	54.26
12	A3B2C4D1	340	212	45.38
13	A3B3C5D2	360	225	44.35
14	A3B4C1D3	320	200	48.26
15	A3B5C2D4	305	191	51.64
16	A4B1C4D2	340	212	44.86
17	A4B2C5D3	360	225	40.96
18	A4B3C1D4	320	200	47.05
19	A4B4C2D5	305	191	49.68
20	A4B5C3D1	292	182	53.62
21	A5B1C5D4	360	225	37.49
22	A5B2C1D5	320	200	43.25
23	A5B3C2D1	305	191	49.59
24	A5B4C3D2	292	182	52.33
25	A5B5C4D3	340	212	45.38

影响参数	K_i₁	K_i₂	K_i₃	K_i₄	K_i₅	R_i
D_n	49.14	49.56	49.50	47.64	46.01	3.55
L_t	46.47	46.31	47.96	50.80	50.32	4.49
G	48.21	51.23	53.16	45.67	42.37	10.79
J_z	49.00	49.71	50.10	47.02	45.97	4.13