复合材料孔隙率的超声检测衰减系数影响因素

Influencing Factors of the Attenuation Coefficient of the Ultrasonic Testing for Composite Porosity

摘要: 针对复合材料孔隙率检测需求，研究超声检测参数和被检测材料本身对超声检测衰减系数的影响，间接推断出衰减幅度的影响因素。开展了检测频率、探头类型、检测水距、材料种类对复合材料声波衰减系数的影响试验。结果表明，检测频率越高衰减系数越大，探头声束宽度越大衰减系数越大，不同材料体系的声衰减系数不同。

Abstract: The influencing factors of the attenuation coefficient for porosity testing of composite are studied in this article. The experiments of changing the test frequency, probe type, water distance and the material to measure the influence to the attenuation coefficients are done. The results show that the higher the detection frequency,the bigger the attenuation coefficient, the bigger the probe beam width,the bigger the attenuation coefficient, and the acoustic attenuation coefficient of different material systems is different.