Simulation on dynamic response characteristics of steel/polyurea composite structures under close-range air blast loading

Table 1. 304 stainless steel material parameters
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Table 1. 304 stainless steel material parameters
参数数值
ρ/(kg·m−3) 7 900
E/GPa 200
PR 0.3
A/MPa 277
B/MPa 556
n 0.794
c 0.009 6
m 0.944
Tm/K 1 673
Tr/K 298
$ {{{\dot \varepsilon }_0}}$/(s−1) 0.001

Table 2. TNT material parameters
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Table 2. TNT material parameters
参数数值
H/MPa 3.738×105
S/MPa 3 750
$ R_1$ 4.15
$ R_2$ 0.9
ω 0.35
En/(kJ·m−3) 6.74×106

Table 3. Scheme design and calculation results

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Table 3. Scheme design and calculation results

试验对象	试验工况	厚度/mm		爆距/mm	钢板最大变形/mm		相对误差/%
试验对象	试验工况	钢板	聚脲	爆距/mm	试验^[10]	仿真	相对误差/%
304不锈钢板	S-2	1.8	0	100	55	52.3	5
304不锈钢板	S-3	1.8	0	150	39.5	38.4	3
钢板/聚脲复合结构	SP-2	1.38	3.1	100	37.9	45.2	20
钢板/聚脲复合结构	SP-3	1.38	3.1	150	34.5	31.5	9.04

Table 4. Thickness matching scheme design and results

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Table 4. Thickness matching scheme design and results

工况	爆距/mm	钢板厚度/mm	聚脲厚度/mm	钢板中心点最大变形/mm
SP-H-1	150	0	23.9
SP-H-2	150	0.5	20.3	破碎
SP-H-3	150	1	16.6	19.03
SP-H-4	150	1.5	13	18.08
SP-H-5	150	2	9.3	19.46
SP-H-6	150	2.5	5.6	21.44
SP-H-7	150	3	2	21.51
SP-H-8	150	3.27	0	23.07

Table 5. Strength ratio scheme design and results

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Table 5. Strength ratio scheme design and results

工况	钢板屈服强度/MPa	钢板最大变形/mm	钢板吸能占比	聚脲吸能占比
A-1	200	40.88	0.779 1	0.220 9
A-2	225	38.98	0.779 2	0.220 8
A-3	250	37.32	0.781 1	0.218 9
A-4	275	35.85	0.781 5	0.218 5
A-5	300	34.59	0.782 6	0.217 4
A-6	325	33.46	0.783 1	0.216 9
A-7	350	32.43	0.784 9	0.215 1

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Ximeng WANG, Jun LIU, Changhai CHEN, Yuansheng CHENG, Pan ZHANG. Simulation on dynamic response characteristics of steel/polyurea composite structures under close-range air blast loading[J]. Chinese Journal of Ship Research, 2021, 16(2): 116

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