HHT在复合材料损伤声发射信号处理中的应用  

Preliminary application of HHT to the acoustic emission signal processing of composite materials

作　　者：阳能军[1] 王新刚[1] 王蒙[1] 

机构地区：[1]第二炮兵工程学院501教研室,西安710025

出　　处：《电子测量技术》2011年第8期45-47,共3页Electronic Measurement Technology

摘　　要：为了研究Hilbert-huang在复合材料损伤声发射信号处理领域的可行性和有效性,介绍了小波变换和Hilbert-huang变换的基本思想和特点,然后对碳/环氧复合材料进行了拉伸损伤实验,提取其声发射信号,并分别利用HHT和小波变换进行了处理。通过对比发现,HHT在处理复合材料声发射信号方面具有更强的自适应性和更高的时频分辨率,能更好的反映不同损伤模式下声发射信号的特性。In order to study on the practicability and affectivity of Hilbert-huang transform in AE signal processing,this paper firstly describes the basic ideal of wavelet transform and HHT,and then uses the carbon/epoxy composite materials for the tensile damage experiment.Extracting its AE signal,and separately using HHT and wavelet transform processing.Through comparison,we can discover,in dealing with composite AE signal aspect,HHT has stronger adaptability and higher time-frequency resolution,can better reflect the AE characteristics under different injury patterns.

关 键 词：复合材料 声发射 小波变换 HHT 

分 类 号：TB33[一般工业技术—材料科学与工程] TG115.28[金属学及工艺—物理冶金]