基于时间反转理论的复合材料螺钉连接失效监测研究

Study on Bolt Debonding Monitoring of Composite Joint Based on Time-reversal Method

随着复合材料在航空航天飞行器中越来越广泛的应用,对复合材料结构安全性和可靠性的研究也越来越重要。介绍了时间反转方法的原理和自聚焦特点;针对Lamb波理论监测复合材料结构连接部螺钉连接失效中存在的问题,研究了基于时间反转理论的复合材料螺钉连接失效监测方法原理和实现技术,以提高监测信号信噪比、优化系统稳定性;通过在真实碳纤维复合材料机翼盒段试件上的地面实验,给出了实验验证,证明了该方法的有效性和实用性。

With the more and more applications of composite materials in aerocraft,the research about security and reliability of composite materials and structures becomes more and more important.This paper presented the principle and characters of the time-reversal theory firstly.Contraposing the problems of the Lamb wave method in bolt debonding monitoring of composite joint,this paper studied the method based on the time-reversal theory to improve the Signal-to-Noise quality of monitoring signal and the monitoring...