复合材料板冲击损伤的Lamb波场成像算法研究  

Research on Lamb Wavefield Imaging Algorithm of Impact Damage in Composite Plates

作　　者：马骁阳 肖文[1] 沙刚刚 左洪福[1] MA Xiao-yang;XIAO Wen;SHA Gang-gang;ZUO Hong-fu(Nanjing University of Aeronautics and Astronautics,Nanjing 211000,China)

机构地区：[1]南京航空航天大学,江苏南京211000

出　　处：《航空计算技术》2022年第4期51-55,共5页Aeronautical Computing Technique

基　　金：国家自然科学基金项目资助(U1933202,12102184);江苏省自然科学基金青年基金项目资助(BK20210270);中央高校基本科研业务费资助(NS2021048);南京航空航天大学研究生科研与实践创新计划项目资助(xcxjh20210707)。

摘　　要：针对民机复合材料板中冲击损伤检测难度大精度低等问题,采用压电传感器激发复合材料板中Lamb波信号,并通过扫描式激光多普勒测振仪感知板中Lamb波场信号,引入Lamb波场曲率放大冲击损伤所致波场奇异成分,计算Lamb波场曲率均方根(RMS)得到损伤图像实现复合材料板中冲击损伤成像。实验结果表明,建立在压电激励和激光感知基础上的Lamb波场曲率RMS图像算法能有效检测出玻璃纤维增强复合材料(GFRP)板中冲击损伤的位置和大小。In view of the difficulty and low accuracy of impact damage detection in civil aircraft composite plates,the piezoelectric sensor is used to excite the Lamb wave signal in composite plates,the Lamb wavefield signal in composite plates is sensed by a scanning laser Doppler vibrometer,the Lamb wavefield curvature is introduced to amplify the singular components in the wavefield caused by impact damage,and the damage image is obtained by calculating the root mean square(RMS)of Lamb wavefield curvature to realize the imaging of impact damage in composite plates.The experimental results show that the Lamb wavefield curvature RMS image method based on piezoelectric excitation and laser sensing can effectively detect the location and size of impact damage in a glass fiber reinforced polymer(GFRP)plate.

关 键 词：Lamb波场 波场曲率 GFRP板 冲击损伤成像 

分 类 号：V258[一般工业技术—材料科学与工程]