滑移爆轰驱动下飞板运动姿态的连续电阻测试法

飞板运动姿态的测定是爆炸焊接机理研究的基础，针对传统电测方法存在干扰因素多、易产生弯曲波等缺陷，设计了一种适用于野外大当量下爆炸焊接飞板姿态实验的连续电阻测试方法。研制了3种不同结构的梯形支架型连续电阻探针元件，利用有限元程序分析了探针的导通压力和响应时间，在此基础上，对3种探针实施了爆炸焊接实验，实验结果表明:金属丝网型探针元件具有最优的导通效果，各段测试曲线光滑无毛刺。以该探针数据计算获得了待测飞板的运动姿态曲线，并与Richter简化模型下的近似计算公式结果进行了对比，两者基本一致。所述测试方法实现了炸药爆速和飞板变形曲线的连续、可靠和快速测量，为滑移爆轰驱动问题、爆轰产物状态方程等的研究提供了测试方法补充。

Continuous resistance test method in determining the attitude of flyer plate driven by sliding detonation

The attitude measurement of a flyer plate is the basis for explosive welding mechanism study. Besides, the key parameters affecting the quality of explosive welding products in the actual explosive processing, including the collision point velocity, the dynamic angle of collision and the impact velocity of the flyer plate, must be determined on the premise by measuring the deformation curve of the flyer plate. Despite the readily available device and convenient operation, the measuring process of the traditional electrical method is easily disturbed by external uncertain factors, and susceptible to bending waves generated by the resistance wire itself. In view of the above shortcomings, a velocity probe-based method was innovatively developed for determining the flyer plate motion of explosive welding in the field. First of all, a velocity probe-based test device, which can effectively suppress the generation and influence of electromagnetic radiation, metal jet and bending wave, was designed and the geometric relationship between the probe data and the flyer plate motion curve was established. After that, three types of trapezoidal velocity probes with different structures were developed, whose conducting pressure and response time were analyzed by the finite element program. Based on the analysis results, two sets of explosive welding experiments were carried out for the three types of probes. The experimental results show that the test performance of the first type (without conducting medium) and the second type (threaded wire type) are not ideal, and there are a lot of data oscillation in the test curves, while the third type of probes (metal mesh type) overcomes the shortcomings of the above two types of probes, whose test curves are smooth without oscillation. The motion attitude curve of the flyer plate was then obtained based on the results of the metal mesh probe, which was in good agreement with the calculation results by Richter's simplified model. The present test method makes it possible to determine detonation velocity and flyer plate attitude continuously, reliably and rapidly, which provides a supplement for the study of the driving problem of sliding detonation and the equation of state of detonation products.