【摘要】 介绍了在“闪光二号”脉冲电子束加速器上采用PVDF压电传感技术测量编织材料等的电子束热激波传播特性的情况。实验得出 :(1 )在能注量为 90～ 2 1 0J/cm2 范围内 ,对 4mm厚的编织材料及其叠层材料 ,热激波应力峰值σa<0 .1GPa ,只有硬铝的十几分之一 ;(2 )编织材料中的热激波作用时间被明显展宽 ,其平均值达 2 .6 μs,是硬铝中的 7倍多。实验结果表明 :(1 )编织材料具有良好的衰减和展宽热激波的性能 ;(2 )对编织材料等的宽作用时间热激波测量来说 ,PVDF压电传感技术具有极其优越的性质。更多还原

【Abstract】 In this paper,the propagating characteristics of thermal shock waves induced by electron beam are investigated experimentally using PVDF piezoelectric gauges.Experimental results indicate:(1) As energy flux is between 90 and 210J/cm 2,peak stress of thermal shock waves in weave material and it′s parted material is below 0.1GPa,which is less than one tenth of that in LY12Al;(2) Action time in weave material is obviously widened,and it′s average value is 2.6μs,which is more than 7 times of that in LY12Al.The experimental results show:(1) The weave material has excellent characteristics of dissipating and widening thermal shock waves;(2) PVDF piezoelectric gauges can be used to measure the thermal shock waves in weave material,which has long action time.更多还原