薄板兰姆波检测特定模态下距离-波幅曲线的应用  

Application of Distance-Amplitude Curve at Special Mode for Lamb Testing of Thin Plate

作　　者：赵帅军[1] 段建刚[1] 李永[1] 

机构地区：[1]沈阳黎明航空发动机公司,沈阳110043

出　　处：《无损探伤》2015年第1期14-16,19,共4页Nondestructive Testing Technology

摘　　要：兰姆波检测是厚度小于6mm轧制金属薄板缺陷检查的常用方法,具有传播距离远、衰减小的优点。工程上常采用脉冲反射法进行检测,在介绍脉冲反射法检测时在特定模态特点的基础上,结合不同材料和厚度的金属板材进行特定模态选择。在选择好的特定模态下结合对比样件制作了距离-波幅曲线,并应用该曲线进行缺陷位置和当量判定。When the thickness of rolling thin metal plate was less than 6mm,lamb testing was often used for defect-detection of the plate.The advantage of lamb testing was long transmissive distance and little attenuation.The method of pulse-echo was often used in engineering.Based on the characteristic of special mode when pulse-echo detection was used for lamb testing,special modes were selected by the metal plates of different material and thickness.Whereafter at the special modes which were decided previously,distance-amplitude curves were made by testing specimens.Finally the location and equivalent of defects were judged according to these curves.

关 键 词：兰姆波检测 特定模态 距离-波幅曲线 

分 类 号：TG115.28[金属学及工艺—物理冶金]