Electric probe measurement technique on deformation process of cylindrical steel shell under inside-explosion loading
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摘要: 为了研究圆柱形爆炸容器在炸药爆炸作用下的变形过程，设计了电探针测量内部爆炸作用下钢筒变形的方法。采用数值模拟方法进行预估，在钢筒的中心进行了120g TNT和180g TNT当量球形装药下的爆炸加载实验，获得了爆炸不同时刻钢筒径向位移随时间的变化关系，电探针测量钢筒最大变形与实验后钢筒变形测量结果较好吻合。Abstract: An electric probe measurement technique was proposed to measure the deformation undergone by the ektexines of the cylindrical steel shells subjected to the detonation of spherical explosive charges inside them.Numerical simulation was carried out to forecast the deformation of the steel shell ektexine at the section of the explosion center in the case of the spherical high-explosive charge equivalent to 120g TNT as well as 180g TNT.Based on the above, the corresponding experiments were conducted.The radical displacements at the different times were obtained at the characteristic points for the ektexines of the cylindrical steel shells.The measured results by electric probes are consistent with the deformation of the cylindrical steel shell after the experiments.
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Key words:
- mechanics of explosion /
- deformation /
- electric probe /
- steel shell /
- inside-explosion
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图 2 爆心截面处钢筒外壁环向应变
Figure 2. Ektexine's loop deformation of cylindrical steel shell under center explosion
图 7 钢筒外壁位移的实验结果和数值模拟结果
Figure 7. Experimental and simulational results of ektexine's displacement
表 1 120 g TNT当量爆炸实验电探针测量结果
Table 1. Experimental result of electric probes measurement under 120 g TNT charge
电探针 l/mm ts/μs δ/% 1 0 2 0.2 14.1 0.32 3 0.5 19.2 0.81 4 1.0 27.1 1.61 5 1.5 36.2 2.42 6 2.0 47.4 3.23 7 2.2 56.0 3.55 8 2.4 
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表 2 180 g TNT当量爆炸实验电探针测量结果
Table 2. Experimental result of electric probes measurement under 180 g TNT charge
电探针 l/mm ts/μs δ/% 1 0 2 0.2 11.2 0.32 3 1.0 21.9 0.81 4 2.0 32.9 1.61 5 3.0 40.6 2.42 6 4.0 57.2 3.23 7 4.5 65.7 3.55 8 5.0 85.0 8.06
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