电火工品在Hopkinson压杆高过载条件下的损伤特性研究
（1）在过载加速度为10万G、脉宽为60微秒的条件下，1-7号雷管抗轴向冲击的能力高于其抗径向的，各种电雷管的抗过载性能差异较小，均具有较好的抗过载能力；
（2）分别在15、20、23万G的加速度峰值、20微秒脉宽的条件下，6号雷管的尺寸及电阻变化很小，雷管具有较好的抗过载能力；
（3）分别在15、20、23万G的加速度峰值、20微秒脉宽的条件下，对每发6号电雷管冲击5次，对比过载前后雷管尺寸可得出，雷管长度在每次撞击后都有所减小，直径有所变化但没有规律性，电阻减小，雷管的抗过载能力较高。10925
关键词 霍普金森杆 波形整形器 过载加速度 电雷管 发火时间 火工品 抗高过载能力
毕业论文设计说明书（论文）外文摘要
Title Research on Damage Characteristic of Electric Initiator with Hopkinson Pressure Bar Under High g Environment
Abstract
The anti-high overload performance of electric detonators is presented by using free and split Hopkinson pressure bar technique. The length, diameter and resistance of detonators were been measured, and X-ray pictures taken. By analyzing experimental data, conclusion are that:
(1)In the conditions of 100 thousand G acceleration overload and pulse width 60 microseconds, showing that detonator’s anti-axial shocks ability is higher than the anti-radial shocks ability;
(2)In the conditions of different peak acceleration which are 150,200,230 thousand G and 20 microsecond pulse, the 6th detonator’s size and resistance changing is very small, indicating that the detonator has a good anti-overload ability;
(3)Each 6th detonator was been assaulted 5 times in the conditions of different peak acceleration which are 150,200,230 thousand G and 20 microsecond pulse, after each assaultion, the detonator’s length and diameter were been measured. Comparing experimental data before and after, we can see that there is a little change between the dates.So detonator has a high anti-overload ability.
Keywords Free Hopkinson Pressure Bar Waveform shaping
Acceleration overload Electric detonator Ignition time
Initiator Overloading-resistibility
目 录
1 绪论 1
1.1 本实验研究的目的及意义 1
1.2 火工品过载实验研究现状 1
1.3 霍普金森杆实验国内外研究现状 2
1.4 本文的研究内容 3
2 霍普金森压杆过载实验方法 4
2.1 实验原理 4
2.1.1 自由式Hopkinson法应力波加载实验 4
2.1.2 分离式Hopkinson法应力波加载实验 5
2.2 实验仪器与装置 7
2.2.1 气动系统 7
2.2.2 压杆系统 8
2.2.3 采集及测量系统 8