摘要
针对基于压电元件和主动Lamb波的螺钉松动监测研究中存在的问题,研究采用聚焦Lamb波信号方法改进现有监测技术。介绍和分析了基于时间反转处理的Lamb波信号聚焦原理和过程,以及基于此的螺钉松动监测特征参数提取以及方法的实现技术;通过在铝板盒段试件上的实验,给出了实验验证,证明了该方法具有较好的实用性。
Aiming to the problems in the bolt debonding monitoring based on PZT and active Lamb wave,this paper presented the improved monitoring method based on focused Lamb waves.The principle and procedure of the Lamb waves focalization by time-reversal process.Improved bolt debonding monitoring method and its application technique are analyzed.The effect and practicability of the new method were demonstrated in experiments in which the joints of a test box with aluminum board were monitoring.
出处
《压电与声光》
CSCD
北大核心
2012年第1期73-75,80,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(61001077)
江苏省高校自然科学基金资助项目(11KJB130002)
南京邮电大学引进人才科研启动基金资助项目(NY209019)
关键词
结构故障监测
螺钉松动
时间反转聚焦
盒段
LAMB波
structure damage monitoring
bolt debonding
time-reversal focalization
test box
Lamb waves
