二级高压驱动阵列弹珠同步弹射微型爆源的研制

针对当前大当量地下爆炸真空室模拟试验中爆源起爆方式高度依赖火药制品等问题，基于地下爆炸相似理论和二级气炮原理，自主研制了二级高压驱动阵列弹珠同步弹射微型爆源装置。装置利用二级高压气体驱动弹珠同步击碎玻璃球壳，释放球内高压气体，以模拟真实爆炸气体生成物的推出。整套爆源装置的发射参数:高压气室充气压力4 MPa，玻璃球壳内残余稳态气体压力约为3 kPa，能够用于0~20 kt当量地下爆炸成坑效应的真空室模拟。爆源适用性试验验证表明，该爆源装置的爆破机制和爆破效果满足大当量地下抛掷爆炸真空室模拟试验的功能需求，且具有较高的安全性、可控性和可操作性，为开展相关模拟试验提供了新的技术方法。

Development of a miniature explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas

Aiming at the problem that the initiation mode of the explosion device is highly dependent on the gunpowder products in the simulation experiments of large-scale underground explosions in a vacuum chamber, and based on the similarity theory of underground explosions and the principle of the two-stage gas gun, a micro explosion device initiated by a synchronous launcher of marbles driven by two-stage high-pressure gas was developed independently. A glass enclosure with compressed gas (filled by air compressor) was used to simulate the high-pressure cavity generated at the beginning of a real underground explosion. Two-stage high-pressure gas was used to drive marbles to break the glass shell synchronously, thus releasing the high-pressure gas in the spherical shell to simulate the ejection of gas products in a real underground explosion. The pressure in the launcher chamber is 4 MPa, and the residual steady-state gas pressure in the glass enclosure is about 3 kPa. The above set of the launch parameters can be used for simulation experiments of real underground explosions with an equivalent of 0?20 kt TNT. Through high-speed imaging of the air and water blasting sphericity tests, the reliability of the explosion device and the sphericity of the blasting effect were verified. When there is a difference in the internal and external pressure of the glass spherical shell, the cracks of the shell are fully developed and the fragments are evenly distributed. The applicability test shows that the blasting mechanism and blasting effect of the explosion device can meet the requirements of the simulation experiment of large-scale underground explosions in the vacuum chamber, and the device has the characteristics of high efficiency, low pollution, convenient operation, good repeatability, good controllability and low requirements for site conditions, which can provide a novel technology for the simulation experiments of large-scale underground explosions in the vacuum chamber.