摘要
根据小型霍普金森杆(Mini-SHB)对发射效率高、体积小、噪声污染小的要求及动态性能测试对高应变率的要求,本文对磁阻式小型霍普金森杆电磁发射系统进行了优化。利用电磁发射原理、电磁仿真计算和控制变量方法,对影响子弹发射速度的五个因素:电容组电容量、电路初始电压、电磁线圈匝数、线圈用漆包线直径、子弹初始位置分别进行了仿真优化。根据仿真得到的各个最优参数研制的电磁发射系统获得了单级16.16m/s、二级21m/s的最高子弹出口速度,达到了微小型试件动态性能测试对高应变率的要求。
According to the requirements for Mini-split Hopkinson bar（SHB）,such as high launching efficiency,small size,low noise pollution and high strain rate in dynamic performance tests,the optimization of electromagnetic launching system of Mini-SHB,is presented in this paper.By using electromagnetic emission principle,electromagnetic simulation and variable control method,the simulation optimization of fives factors influencing the bullet launching velocity was carried out respectively,including capacitor bank capacity,circuit initial voltage,electromagnetic coil turns,coil wire diameter,initial position of bullet.The electromagnetic launching system developed based on each simulation optimized parameters enables the highest bullet exit velocity to reach 16.16m/s for single stage and 21m/s for two stages,respectively,which meets the requirements of high strain rate for dynamic performance test of miniature specimens.
出处
《实验力学》
CSCD
北大核心
2015年第1期9-16,共8页
Journal of Experimental Mechanics
基金
国家自然科学基金资助(NOS.11072033
11232008
11372037)
北京市自然基金资助(NO.3122027)
关键词
电磁发射技术
小型霍普金森杆
动态力学性能
高应变率
electromagnetic launching technique
mini-split Hopkinson bar（SHB）
dynamic mechanical properties
high strain rate
