超声检测中的声场特性及应用分析  

ANALYSIS ON ACOUSTIC FIELD CHARACTERISTIC AND APPLICATION IN ULTRASONIC TESTING

作　　者：彭应秋[1] 李坚[1] 权义萍[2] 杨五兵[1] 

机构地区：[1]南昌航空工业学院,江西南昌330034 [2]南京工业大学

出　　处：《无损检测》2003年第12期612-615,643,共5页Nondestructive Testing

基　　金：航空科学基金资助项目(01G56003);江西省测控研究中心基金资助项目 (2 0 0 1 . 0 0 7)

摘　　要：针对超声检测中影响缺陷定量准确性的声场问题进行了深入讨论,研究了脉冲波声场的计算方法,绘制出实用换能器声轴线上的声压分布曲线,分析了不同材料和厚度的采样回波对频谱的影响,比较了连续波声场和脉冲波声场的分布特性及异同点,为提高超声检测中缺陷定量的准确性和科学性提供了依据。The characteristic and calculation of the acoustic field affecting the accuracy of ultrasonic sizing of defects were discussed, and the distribution of the acoustic pressure on the axis of commercial ultrasonic transducer was plotted. The effect of the variety and thickness of materials on the spectrum of echoes was analyzed. The acoustic field characteristic of the pulse waves radiated by a commercial transducer was compared with that of ideal continuous mono-frequency waves. Results provided basis for the improvement of accurate flaw equivalent in ultrasonic testing.

关 键 词：超声检验 声场 声压分布 缺陷当量 

分 类 号：TG115.285[金属学及工艺—物理冶金]