Research on highly accurate structural health monitoring based on the Lamb wave propagation analysis for composites structures

本研究针对飞行器和高速飞行器中具有传感器和执行器网络的智能金属和复合材料结构，提出了一种高精度的兰姆波传播数值模拟方法和信号处理方法。在详细研究兰姆波与各种损伤相互作用的基础上，研究了兰姆波的反射和透射波的产生机理以及反射和透射波的特性。提高了金属结构和复合材料结构损伤位置识别的准确性和可靠性，并建立了损伤大小的定量评估方法。

In this research, for smart metallic and composite structures with sensor and actuator network in operating aircrafts and high speed vehicles, a highly accurate numerical simulation method of Lamb wave propagation and a signal processing method have been developed. Based on detailed investigations of interactions between Lamb wave and various damages, the mechanism of reflected and transmitted waves, and the characteristics of these reflected and transmitted waves have been studied. Then, the identification accuracy and reliability of damage location in metallic and composite structures has been improved, moreover, quantitative evaluation methods of damage size have been built up.