An Experimental Approach for Detection of the Acoustic Radiation Induced Static Component in Solids  

作　　者：Ming-Xi Deng 邓明晰(College of Aerospace Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]College of Aerospace Engineering,Chongqing University,Chongqing 400044,China

出　　处：《Chinese Physics Letters》2020年第7期24-27,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant No.11834008)。

摘　　要：We propose an experimental approach to directly detect the acoustic radiation induced static component(SC)of primary longitudinal(L)wave propagation in solids using an ultrasonic pitch-catch technique,where a lowfrequency ultrasonic transducer is used to detect the SC generated by the co-propagating primary L-wave tone burst that is excited by a high-frequency ultrasonic transducer.Essentially,the experimental approach proposed uses a dynamic method to detect the SC generated.The basic requirement is that the central frequency of the low-frequency ultrasonic transducer needs to be near the center of the main lobe frequency range of the time-domain envelope of the primary L-wave tone burst.Under this condition,the main lobe of the frequency spectrum of the SC pulse generated adequately overlaps with that of the low-frequency ultrasonic transducer.This will enable the generated SC pulse to be directly detected by the low-frequency ultrasonic transducer.The performed experimental examination validates the feasibility and effectiveness of the proposed approach for direct detection of the acoustic radiation induced SC generated by L-wave propagation in solids.

关 键 词：SOLIDS WAVE SOLID 

分 类 号：TB55[理学—物理]