基于虾螯的仿生多胞薄壁管耐撞性分析及优化

doi:10.13229/j.cnki.jdxbgxb20200838

Abstract

Abstract:

In order to improve the crashworthiness of thin-walled absorber, a new type of bionic multi-cell tube was designed based on dactyl club microstructure of O. scyllarus. The crashworthiness of bionic multi-cell tubes with different herringbone ratios η (the ratio of herringbone height A and width λ) were comprehensively investigated under different loading angles (θ=0o, 10o, 20o and 30o, respectively). The bionic multi-cell tube presents progressive folding deformation mode under axial (θ=0o) and small oblique loading angle (θ=10o). Compared with axial loading condition, the bionic multi-cell tubes have larger speci?c energy absorption E_s and crush force ef?ciency C_f, but smaller peak crush force F_p when θ is 10o. A complex proportional assessment method was applied to solve this multi-criteria decision problem. The result shows that the bionic multi-cell tubes have superior crashworthiness when their η ranges from 0.6 to 1.0, and from 1.5 to 1.7, and η=1.5 was selected the best sectional con?guration herein. Following such optimal selection, a metamodel-based multiobjective optimization method based on polynomial regression metamodel and multiobjective particle optimization algorithm were adopted for the dimensions design of the optimal selection. The optimal parameters of thickness t ranges from 0.75 mm to 1.2 mm, element width λ ranges from 5.5 mm to 9.5 mm, the initial peak crush force F_p and maximum speci?c energy absorption E_s is 59.8 kN and 13.28 kJ/kg, respectively. The bionic design and optimization method in this work hope to provide a reference for the lightweight design of thin-walled energy absorber.

Key words: engineering bionics, thin-walled tube, bionic structure, crashworthiness, multi-objective optimization

CLC Number:

TB17

Han HUANG,Qing-hao YAN,Zhi-xin XIANG,Xin-tao YANG,Jin-bao CHEN,Shu-cai XU. Crashworthiness investigation and optimization of bionic multi⁃cell tube based on shrimp chela[J].Journal of Jilin University(Engineering and Technology Edition), 2022, 52(3): 716-724.

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References 17

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指标	比较对数			W_j	w_j
指标	1	2	3	W_j	w_j
F_p	2	3	-	5	5/12=0.417
E_s	2	-	3	5	5/12=0.417
C_f	-	1	1	2	2/12=0.166

η	θ=0°			θ=10°			θ=20°			θ=30°
η	F_p/10^-4	E_s/10^-4	C_f/10^-4	F_p/10^-4	E_s/10^-4	C_f/10^-4	F_p/10^-4	E_s/10^-4	C_f/10^-4	F_p/10^-4	E_s/10^-4	C_f/10^-4
0.5	22.24	22.40	6.63	15.62	22.76	9.59	16.06	12.58	5.15	13.66	8.81	4.24
0.6	22.22	24.46	7.24	15.77	24.20	10.10	15.92	12.17	5.03	13.64	9.22	4.45
0.7	22.36	25.18	7.41	16.31	24.37	9.83	15.36	11.93	5.11	13.45	9.13	4.47
0.8	23.71	24.50	6.80	16.07	23.78	9.73	15.27	12.02	5.18	12.82	8.92	4.57
0.9	24.13	24.67	6.73	15.74	23.69	9.90	15.03	11.89	5.20	14.01	8.94	4.20
1.0	22.17	23.44	6.95	15.43	22.93	9.78	14.58	11.54	5.21	13.54	8.74	4.25
1.1	22.28	23.80	7.03	15.17	22.24	9.65	15.22	10.68	4.62	13.62	8.41	4.06
1.2	24.14	23.30	6.35	15.08	21.59	9.42	14.98	11.30	4.96	13.30	8.18	4.04
1.3	22.12	23.01	6.84	14.58	21.49	9.70	14.33	11.26	5.17	13.30	8.23	4.07
1.4	23.26	22.66	6.41	14.51	20.78	9.42	13.90	11.87	5.62	13.33	8.00	3.95
1.5	24.10	22.25	6.07	14.52	20.05	9.08	13.78	18.26	8.72	12.41	7.72	4.09
1.6	23.72	21.59	5.99	14.01	19.31	9.07	13.42	17.79	8.72	12.30	7.55	4.04
1.7	22.22	21.24	6.29	13.30	19.19	9.49	13.00	12.73	6.45	12.03	7.56	4.13
1.8	22.14	20.69	6.15	13.21	18.67	9.30	14.33	12.74	5.85	12.13	7.49	4.06
1.9	22.13	20.92	6.22	13.91	18.15	8.58	13.34	12.67	6.25	12.43	7.13	3.78
2.0	22.56	21.40	6.24	13.02	18.75	9.47	13.80	11.49	5.48	11.69	7.32	4.12

η	S₊_i	S_-_i	Q_i	排名
0.5	0.009 22	0.006 76	0.0155	10
0.6	0.009 69	0.006 76	0.0160	4
0.7	0.009 74	0.006 75	0.0160	3
0.8	0.009 55	0.006 79	0.0158	5
0.9	0.009 52	0.006 89	0.0157	8
1.0	0.009 28	0.006 57	0.0157	6
1.1	0.009 05	0.006 63	0.0154	11
1.2	0.008 91	0.006 75	0.0152	16
1.3	0.008 98	0.006 43	0.0156	9
1.4	0.008 87	0.006 50	0.0154	12
1.5	0.009 62	0.006 48	0.0162	1
1.6	0.009 40	0.006 34	0.0161	2
1.7	0.008 71	0.006 05	0.0157	7
1.8	0.008 49	0.006 18	0.0153	14
1.9	0.008 37	0.006 18	0.0152	15
2.0	0.008 43	0.006 11	0.0154	13

工况	w₁	w₂	w₃	w₄
1	1.00	0.00	0.00	0.00
2	0.00	1.00	0.00	0.00
3	0.00	0.00	1.00	0.00
4	0.00	0.00	0.00	1.00
5	0.10	0.20	0.30	0.40
6	0.25	0.25	0.25	0.25
7	0.40	0.30	0.20	0.10

优化目标	θ/（°）	R²	MARE/%	RMSE
F_p	0	0.9996	2.73	0.3522
	10	0.9991	3.07	0.4944
	20	0.9960	5.93	0.8884
	30	0.9936	8.71	0.9947
E_s	0	0.9875	5.64	0.2716
	10	0.9960	1.06	0.0430
	20	0.9647	5.34	0.1031
	30	0.9725	3.42	0.0564

Crashworthiness investigation and optimization of bionic multi⁃cell tube based on shrimp chela

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