基于HHT的复合材料层合板结构损伤识别  

Structural Damage Identification of Composite Plate Based on HHT

作　　者：华林[1] 康建雄[1] 王富生[1] 刘军[1] 岳珠峰[1] 

机构地区：[1]西北工业大学工程力学系,陕西西安710129

出　　处：《测控技术》2017年第12期20-23,28,共5页Measurement & Control Technology

基　　金：国家自然科学基金资助项目(51475369)

摘　　要：针对航空飞行器复合材料层合板结构的健康监测,提出一种基于HHT的新型损伤特征量提取方法。利用结构动态响应信号的Hilbert能量谱构造了损伤特征量,用以表征信号的能量变化,从而对带损伤结构进行损伤识别。通过光纤布拉格光栅(FBG)加速度传感器采集数据,比较复合材料层合板在完好和带损伤两种情况下的信号能量变化,实现了对结构小损伤的识别。试验结果表明,构造的结构损伤特征量可以应用于复合材料层合板的结构健康监测,具有良好的灵敏度和实用性。Aiming at the structural health monitoring of aircraft composite plates, a new method of extracting structural damage identification based on the Hilbert-Huang transform(HHT) is developed. The Hilbert energy marginal spectrum of the signal of dynamic response is used to abstract damage characteristics, which can reflect the signal energy variation to identify the structural damage. The FBG( fiber Bragg grating) acceleration sensor is used to collect the data. The signal energy of intact and damaged composite plate is compared to implement the identification of small structural damage. Results from composites test reveal that the constructed structural damage feature index has good sensitivity and practicality in the structural health monitoring of timevarying signal.

关 键 词：HHT 信号能量变化量 复合材料层合板 FBG传感器 损伤识别 

分 类 号：V221[航空宇航科学与技术—飞行器设计]