火炸药学报

为提高水下爆炸时水激波管对压力校准的精度,在原有的设计基础上,针对压力源起爆装置,探讨了装药壳体厚度对水激波管内爆炸产生的冲击波压力的影响; 利用AUTODYN-2D软件,对壳体厚度分别为0.5、1.5、2.5、3.5和5.0mm下的小当量TNT装药起爆进行数值模拟,获得了不同壳体厚度下水激波管内多个距离处的压力时程曲线; 将点火头起爆装置改为雷管起爆装置进行试验,对数值模拟进行验证。结果表明,壳体越厚,其对冲击波在水激波管内的约束作用越明显; 相同的传播距离下,壳体越厚,冲击波压力峰值越小,脉宽越大; 在端盖处,当填装比为2(壳厚为5mm)时,其压力峰值可达等条件下裸药的0.42倍; 试验结果证明了模拟结果的准确性以及设计的起爆装置的可行性。

To improve the design of water shock tube and make the calibration result more accurate, the effect of shell thickness of the detonating device on the shock wave pressure of explosion in the water shock tube was discussed. Using AUTODYN-2D software, the numerical simulation of detonation of small equivalent TNT charge with shell thicknesses of 0.5, 1.5, 2.5, 3.5 and 5.0mm were performed and the corresponding pressure histories at various distances in the water shock tube were obtained. The ignition head device was changed to detonator device to carry on the experiment and the numerical simulation results was verified. The results show that the thicker the shell at the same propagation distance, the smaller the peak value of the shock wave pressure and the larger the pulse width. When the packing ratio is 2(shell thickness of 5mm), the pressure peak value can reach 0.42 times that of the bare explosive under the same conditions at the end cap. The experiment results prove the accuracy of the simulation results and the feasibility of the designed detonation device.

引言
1 校准原理
2 数值计算
3 试验验证
4 结论

图1 水激波管校准系统构成<br/>Fig.1 Calibration system based on water shock tube

图1 水激波管校准系统构成
Fig.1 Calibration system based on water shock tube

图2 水激波管模型<br/>Fig.2 Model of the water shock tube

图2 水激波管模型
Fig.2 Model of the water shock tube

图3 起爆后0.002ms的压力分布<br/>Fig.3 Pressure distribution at an interval of 0.002ms after explosion

图3 起爆后0.002ms的压力分布
Fig.3 Pressure distribution at an interval of 0.002ms after explosion

图4 水介质下压力传播云图<br/>Fig.4 Pressure propagation contour under water

图4 水介质下压力传播云图
Fig.4 Pressure propagation contour under water

图5 裸药(0.1g)水激波管内爆炸模拟结果<br/>Fig.5 Simulation results of bare charge(0.1g)explosion in water shock tube

图5 裸药(0.1g)水激波管内爆炸模拟结果
Fig.5 Simulation results of bare charge(0.1g)explosion in water shock tube

表1 Cole经验公式计算和水激波管内爆炸数值模拟结果的比较<br/>Table 1 Comparison between Cole's empirical formula calculation and numerical simulation results of explosion in water shock tube

表1 Cole经验公式计算和水激波管内爆炸数值模拟结果的比较
Table 1 Comparison between Cole's empirical formula calculation and numerical simulation results of explosion in water shock tube

图6 裸药(0.85g)水激波管内爆炸模拟结果<br/>Fig.6 Simulation results of bare charge(0.85g)explosion in water shock tube

图6 裸药(0.85g)水激波管内爆炸模拟结果
Fig.6 Simulation results of bare charge(0.85g)explosion in water shock tube

图7 不同壳体厚度时的压力—时间曲线<br/>Fig.7 Pressure—time curves under different shell thickness

图7 不同壳体厚度时的压力—时间曲线
Fig.7 Pressure—time curves under different shell thickness

表2 裸药与不同厚度壳体下的带壳爆炸的特征参量<br/>Table 2 Characteristic parameters of explosion under bare charge and shells with different thicknesses

表2 裸药与不同厚度壳体下的带壳爆炸的特征参量
Table 2 Characteristic parameters of explosion under bare charge and shells with different thicknesses

图8 雷管起爆装置<br/>Fig.8 Detonator initiating device

图8 雷管起爆装置
Fig.8 Detonator initiating device

图9 两类起爆装置起爆试验波形<br/>Fig.9 Waveform for detonation of two devices

图9 两类起爆装置起爆试验波形
Fig.9 Waveform for detonation of two devices

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备注

引言

1 校准原理

2 数值计算

3 试验验证

4 结论

期刊信息

备注

引言

1 校准原理

2 数值计算

3 试验验证

4 结 论

期刊信息

4 结论