电火工品在Hopkinson压杆高过载条件下的损伤特性研究

摘要为了研究电雷管的抗高过载性能，利用自由式霍普金森压杆过载实验技术对电雷管试样进行加载。在过载实验前后，测量电雷管试样的长度、直径和电阻值的变化，并拍摄X光照片。通过分析实验数据，可以得到以下结论：
（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 电火工品在Hopkinson压杆高过载条件下的损伤特性研究:http://www.youerw.com/huaxue/lunwen_10162.html