基于压电阵列的无波速主动损伤监测方法研究

Study on Active Damage Imaging Monitoring Method With No Wave Velocity Based on Piezoelectric Array

主动技术在结构健康监测研究中有着不可替代的作用。文章研究了基于压电传感阵列的无波速主动结构健康监测方法,给出了单像素点的损伤概率计算方法及在不计算Lamb波波速的情况下对结构进行主动损伤成像、定位的方法。通过实验,对比了利用波速标定值的传统方法和无波速监测方法的成像定位效果,发现了无波速主动监测方法能有效提高定位精度,提升成像效果,为基于压电阵列的结构健康监测技术提供了一种新的工业应用方法。

The active method has an irreplaceable role in the structural health monitoring research.The article studied the active structural health monitoring method with no wave velocity based on the piezoelectric array.The damage probability calculation method of single pixel dot was given.The active structural damage imaging and locating method without calculating the Lamb wave velocity was also given.Through comparing the conventional method result which uses the experimental calibration velocity with the new method with no wave velocity,it is found that the active monitoring method with no wave velocity can improve the location accuracy and imaging result effectively.The method provides a new industrial application way for structural health monitoring technology based on the piezoelectric array.