机构地区: 南京航空航天大学航空宇航学院智能材料与结构航空科技重点实验室
出 处: 《仪器仪表学报》 2008年第9期1816-1821,共6页
摘 要: 结构损伤的监测、定位和辨识技术是结构健康监测研究中的一个热点,也是当前研究的难点之一。针对结构损伤监测及表征方法研究的不足,分析了时间反转聚焦和四点圆弧定位法原理,在此基础上对四点圆弧定位实现方法进行了改进和扩展,提出了基于时间反转方法的结构损伤图像表征方法,采用Lamb波主动健康监测技术在铝板结构试件上进行了实验验证研究。实验结果表明该方法能较为简单有效的表征损伤特征和范围,有助于结构健康监测的实用化。 Research on damage monitoring, location and identification is crucial for structure health monitoring (SHM). On the basis of time reversal focus theory and four-point arcs location method, and the improvement and extendibility to four-point arcs location method, an imaging representation using time reversal theory was proposed for damage location and identification. An initiative health monitoring technique using Lamb wave was applied on the aluminum board structure as a experiment, and the results show that this method can express the character and range of the damage easily and effectively, which was significative to the practicality of SHM technique.