摘要
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5.0 mm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5 mm)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-2 D software, the numerical simulation of detonation of small equivalent TNT charge with shell thicknesses of 0.5, 1.5, 2.5, 3.5 and 5.0 mm 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 5 mm), 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.
作者
施宇成
徐春冬
孔德仁
SHI Yu-cheng;XU Chun-dong;KONG De-ren(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2020年第3期314-319,I0004,共7页
Chinese Journal of Explosives & Propellants
基金
国家计量课题基础技术项目(No.J092013B003)。
关键词
爆炸力学
水下爆炸
水激波管
起爆装置
壳体厚度
冲击波
数值模拟
explosion mechanics
underwater explosion
water shock tube
detonation device
shell thickness
shock wave
numerical simulation
