南京航空航天大学学报2011，Vol.43Issue(2)：184-190,7.
基于Lamb波和匹配追踪方法的结构损伤定位
Structure Damage Localization Based on Lamb Waves and Matching Pursuits
摘要
Abstract
A damage localization method for plate structure is developed based on Lamb waves and matching pursuit method with Chirplet dictionary. Firstly, a signal processing method is developed using matching pursuits. It can decompose Lamb signals into a linear expansion of several Chirplet atoms with a fast operation speed; Secondly, the relationship between Lamb wave's dispersion and Chirplet's chirp rate is developed. It shows that the Chirplet atom can match the dispersion pulse accurately, and it can be used to identify the modes of Lamb waves; Thirdly, a method for damage localization is developed based on the difference between the raw signals and the damaged signals. It can distinguish the overlapped signals reflected from several damages. The effectiveness and accuracy are verified by simulation, experiments of isotropic plate structure and honeycomb sandwich of carbon fiber composite structure.关键词
结构健康监测/Lamb波/匹配追踪方法/Chirplet原子/损伤定位Key words
structure health monitoring/ Lamb waves/ matching pursuit method/ Chirplet atom/ damage localization分类
信息技术与安全科学引用本文复制引用
冯勇明,周丽,李真..基于Lamb波和匹配追踪方法的结构损伤定位[J].南京航空航天大学学报,2011,43(2):184-190,7.基金项目
国家自然科学基金(10572058)资助项目 （10572058）
航空基金(2008ZA52012)资助项目 （2008ZA52012）
江苏省研究生培养创新工程(CX09B_070Z)资助项目. （CX09B_070Z）
