高g值加速度发生器中的波形整形技术

Pulse-shaping techniques of high-g-value acceleration generators

以Hopkinson压杆实验装置作为火工品抗过载实验中的高g值加速度发生器,通过数值模拟分析了子弹(形状)、波形整形器(材料、直径、厚度)对加载脉冲的影响规律,并获得了所需的加速度脉冲,实现了有效控制和改善火工品冲击实验中的加载环境。研究结果可为检验火工品在冲击环境下或经冲击后性能可靠度的实验设计、测试等提供依据。

A Hopkinson pressure bar device was utilized in high overloading tests for initiators as a high-g-value acceleration generator. And a finite element model was created to simulate the operation process of producing acceleration pulses. The effects of the bullets and the pulse shapers on the load- ing pulses were investigated by considering the shapes of the bullets as well as the materials, diame- ters and thicknesses of the pulse shapers, respectively. To realize the purpose of effectively control- ling and improving the loading environment in impact tests for initiators, the required acceleration pulses were obtained. So the investigated results can provide a basis for experimental designations and tests to check the reliability of initiators in impact environments.