冲击加载对爆电换能器电输出特性的影响

Impact of Shock Loading on Eelectrical Output Characteristics of Explosive Transducer

为阐明自供能装置中以压电陶瓷为核心装置的动态响应特征,通过模拟自供能技术中爆电换能器冲击压电陶瓷的真实工况,揭示了冲击应力对压电陶瓷电输出特性的影响。利用霍普金森压杆(split Hopkinson pressure bar,SHPB)作为冲击装置,通过改变子弹的冲击速度进行冲击PZT-5压电陶瓷实验。同时利用有限元分析软件进行冲击压电陶瓷的有限元分析,将实验结果与仿真结果进行对比。结果表明:实验结果与仿真结果基本吻合,冲击速度在7~31.3 m/s时,通过改变爆电换能器的冲击速度可以改变爆电换能器的输出电压峰值,并且爆电换能器中的压电陶瓷受到的冲击应力峰值与压电陶瓷产生的电压峰值呈正相关。

In order to evaluate the dynamic response characteristics of self-powered equipment with piezoelectric ceramics as the core component,this study revealed the influence of impact stress on the electrical output characteristics of piezoelectric ceramics by simulating its impact by electrical transducer in self-powered technology.The impact of the PZT-5 piezoelectric ceramic experiment by changing the impact speed of the bullet was conducted by using split Hopkinson pressure bar(SHPB)experimental technique.Meanwhile,the finite element analysis of impact piezoelectric ceramics was carried out by finite element analysis software,and the simulation results were compared with the experimental results.Results show that the experimental data is basically consistent with simulation results.When the impact velocity value is ranged from 7 to 31.3 m/s-1,the peak value of the output voltage will be changed by altering the impact velocity of the explosive transducer.Furthermore,there exists a positive relationship between the peak values of the impact stress on piezoelectric ceramic and the voltage generated by the piezoelectric ceramic in electrical transducer.