摘要
针对宇航级复合气瓶声发射传播与衰减特性的测量难题,摸索了声发射波的幅度衰减系数理论计算方法,得到了适用于混杂波幅度衰减系数的理论计算公式。利用两种规格的声发射模拟源在复合气瓶上进行了试验.。结果表明:理论衰减曲线与实测衰减曲线吻合良好;不同模拟源产生的声发射模拟信号在频率成分、信号强度上存在较大的不同,综合考虑认为,Φ0.5 mm/2H铅笔芯折断模拟源更适合复合气瓶的声发射检测。
To overcome the difficulty in measurement of the acoustic emission(AE)propagation and attenuation characteristics of aerospace composite cylinders,the theoretical formula for the amplitude attenuation coefficient of hybrid wave was obtained by studying theoretical calculation method of AE wave amplitude attenuation coefficient.The experiments on the composite cylinder were carried out by using two specifications of the AE simulators. The results demonstrate that the actual attenuation curves match well with the theoretical attenuation curves. The signal frequency and strength are different by using different AE simulators. The AE simulator of Φ0. 5 mm/2 H pencil is more suitable for AE detection of composite cylinder.
作者
刘哲军
葛丽
陈博
张志超
邱斌
LIU Zhejun;GE Li;CHEN Bo;ZHANG Zhichao;QIU Bing(Aerospace Research Institute of Material&Processing Technology,Beijing 100076;Sichuan Aerospace Changzheng Equipment Manufacturing Co.Ltd.,Chengdu 610100)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2021年第1期87-89,共3页
Aerospace Materials & Technology
关键词
声发射
复合气瓶
幅度衰减
Acoustic emission
Composites gas cylinder
Amplitude decay
