摘要
利用两次脉冲回波试验中测量的延迟块自由底面回波、延迟块/测试样品界面回波以及橡胶试样底面回波共3个信号的傅立叶变换幅度谱,能够求取试样在一定频率范围内的声衰减值。与国标GB/T18022-2000中的方法相比,该方法具有装置简单、操作便捷的特点,并且能够用于测试试样的横波衰减。
Fourier amplitude spectrum of three echo signals from a free block buffer bottom surface and the interface between the block buffer and specimen, and the specimen bottom surface collected during a two-time Ultrasonic Pulse-echo experiment gives Attenuation value of Plastic-rubber-like Materials. In contrast to the method described in the nation standard of GB/T 18022-2000, the method uses less devices than normal methods and has simple procedure. Furthermore, it can also be used to measure the attenuation of transversal wave.
出处
《天津冶金》
CAS
2006年第1期49-51,共3页
Tianjin Metallurgy
关键词
声衰减
测量
脉冲回波法
acoustic attenuation
measurement,
pulse-echo method
