基于认知技术的Lamb波结构损伤检测

Structural damage detection based on cognitive technology

在雷达领域最新技术进展的启发下,提出了一种新的概念——认知结构健康监测。认知结构健康监测是一种可以智能处理环境变化引起影响的结构健康监测系统:在先验知识及智能推理的基础上,通过调整系统输入及输出功能实现智能处理。并在此基础上提出了一种基于认知的Lamb波结构损伤检测方法,通过仿真进行了验证。铝板上的仿真结果表明,该方法能够在温度变化等干扰下准确地提取出与边界反射波混叠的损伤反射波,从而实现对边界附近损伤的检测。

Inspired by latest technological advances in the field of radar, a novel concept of cognitive Structure Health Monitoring(SHM) is presented in this paper. Cognitive SHM refers to the SHM system that is capable of interacting intelligently with its environment by adapting both its transmit and receive functions based on contextual awareness and expert reasoning. With the concept of cognitive, a guide-wave SHM method is developed to demonstrate the advantage of cognitive SHM. By numerical simulation on an aluminum plate, the capability of the presented method for detecting the damage near the edge of the structure under varying ambient temperature is validated.