Page 117 - 《爆炸与冲击》2023年第2期
P. 117
第 43 卷 郝礼楷,等: JPC聚能装药对钢筋混凝土墙毁伤效应的试验与数值模拟研究 第 2 期
坏特征并未发生显著改变,破坏现象依旧表现为正面漏斗坑、内部侵彻孔洞以及背面漏斗坑。与大范围
空气域的数值模拟结果相比,减小空气域范围后,墙体正面和背面漏斗坑直径均明显减小,内部裂纹数
量明显减少,破坏程度有所减轻。
Air
JPC
Air JH-2 explosive
Liner
Concrete wall
图 15 减小空气域后 JPC 聚能装药破坏钢筋混凝土墙的数值模型
Fig. 15 Numerical model of reinforced concrete wall damaged by the JPC after reducing air domain
D 1 =29.2 cm D 1 =62.4 cm
Effective plastic strain
H 1 =8.6 cm 2.00
D 3 =5.9 cm H 1 =9.4 cm
D 3 =5.9 cm 1.99
1.98
1.97
1.96
1.95
1.94
1.93
D 4 =5.7 cm D 4 =5.6 cm H 2 =11.5 cm 1.92
H 2 =11.3 cm 1.91
1.90
D 2 =33.6 cm D 2 =44.4 cm
(a) Small air domain (b) Large air domain
图 16 不同尺寸空气域的数值模拟结果对比(炸高 20 cm)
Fig. 16 Comparison of numerical simulation results of different air domains (standoff distance is 20 cm)
D 1 =29.6 cm D 1 =42.2 cm
Effective plastic strain
H 1 =8.5 cm H 1 =8.9 cm 2.00
D 3 =5.8 cm D 3 =5.8 cm 1.99
1.98
1.97
1.96
1.95
1.94
1.93
D 4 =5.5 cm D 4 =6.8 cm H 2 =13.1 cm 1.92
H 2 =12.2 cm 1.91
1.90
D 2 =48.8 cm D 2 =55.6 cm
(a) Small air domain (b) Large air domain
图 17 不同尺寸空气域的数值模拟结果对比(炸高 30 cm)
Fig. 17 Comparison of numerical simulation results of different air domains (standoff distance is 30 cm)
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