作者单位:LIU Song-ping,LIU Fei-fei,LI Le-gang,GUO En-ming,WANG Rui-chuan(The Research and Developmen Center for NDT&E Techniques,Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China)刘松平,刘菲菲,李乐刚,郭恩明,王瑞川(北京航空制造工程研究所,北京100024)