用于柱形爆炸容器周向大变形历程测量的应变丝技术

李进; 熊琛; 张德志; 马艳军; 李运良; 秦学军

doi:10.11883/1001-1455(2017)06-0976-06

用于柱形爆炸容器周向大变形历程测量的应变丝技术

doi: 10.11883/1001-1455(2017)06-0976-06

西北核技术研究所，陕西西安 710024

详细信息

作者简介:
李进(1985—)，男，博士研究生，工程师, lijin@nint.ac.cn

中图分类号: O389
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- 被引次数: 3
出版历程
- 收稿日期: 2016-04-12
- 修回日期: 2017-01-12
- 刊出日期: 2017-11-25

Strain wire measurement technique used in calibrating circumferential large deformation of cylindrical explosion vessels

Northwest Institute of Nuclear Technology, Xi'an 710024, Shaanxi, China

摘要

摘要: 为了测量柱形爆炸容器的动态周向大变形历程，开发了应变丝测量技术。选用性能良好的合金丝沿爆炸容器周向固定，容器膨胀变形驱动合金丝同步伸长，配合适当的电路，检测合金丝的电阻变化，从而获得容器的变形历程。在钢筒的中心进行了120 g TNT当量球形装药下的爆炸加载实验，获得了峰值超过20%的钢筒周向变形历程。测量结果与实验后钢筒变形实测结果及数值模拟结果吻合较好。
- 柱形容器 /
- 动态大变形 /
- 应变 /
- 应变丝
Abstract: In the present work we developed a strain wire measurement technique that can be used to measure the dynamic deformation process of cylindrical explosion vessels. The strain wires, compactly fixed along the circumference of the explosion vessels, extended synchronously when the vessels deformed due to the wires' good ductility. Coupled to appropriate circuitry, the resistance profiles of the alloy wires were measured to determine the dynamic deformation process of the explosion vessels. A 120 g TNT spherical high explosive experiment was performed in a cylindrical steel shell. The circumferential deformation curve of the shell was obtained, the peak value of which exceeded by 20%. The result of the strain wires measurement accorded with both the simulation result and the deformation data from the cylindrical steel shell experiment.
- cylindrical explosion vessel /
- dynamic large deformation /
- strain /
- strain wire

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图 1 康铜丝电阻变化量与长度变化量标定装置

Figure 1. Calibration device of resistance and length variation of constantan wires

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图 2 康铜丝电阻变化量与长度变化量标定结果

Figure 2. Calibration results of resistance and length variation of constantan wires

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图 3 用于应变丝电阻变化量检测的恒流源电路

Figure 3. Constant-current source circuit for detecting resistance variation of strain wires

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图 4 应变丝固定安装结构示意图

Figure 4. Schematic of installation structure of strain wires

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图 5 手动剪电探针时触发记录的信号

Figure 5. Voltage profiles for cutting electric probes

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图 6 爆炸实验应变丝输出的原始信号

Figure 6. Original profiles outputted by strain wires in the explosive experiment

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图 7 应变丝获得的完整钢筒变形历程

Figure 7. Complete deformation curve of cylindrical shell obtained by strain wires measurement

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图 8 应变丝测量结果与数值模拟的对比

Figure 8. Comparison between results of simulation and strain wires measurement

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表 1 康铜丝电阻变化与伸长量关系拟合参数

Table 1. Fitting parameters of resistance and length of constantan wires

参数	Ø0.4 mm	Ø0.4 mm	Ø0.3 mm	Ø0.3 mm	Ø0.2 mm	Ø0.2 mm	Ø0.2 mm
a	2.20	2.20	2.20	2.20	2.20	2.20	2.20
b	0.012	0.012	0.008	0.010	0.011	0.010	0.008

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