基于小波时频分析的锚固缺陷诊断方法  

AN ANALYSIS OF BOLT BONDING INTEGRITY BASED ON WAVELET TIME FREQUENCY

作　　者：夏代林[1] 吕绍林[1] 肖柏勋 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083 [2]长江水利委员会长江工程地球物理勘测研究院,湖北武汉430010

出　　处：《物探与化探》2003年第4期312-315,319,共5页Geophysical and Geochemical Exploration

摘　　要：锚固体系中存在不同大小和程度的缺陷时,声波在传播过程中将产生能量衰减、相位突变及频散现象。利用小波时频分析及能量集中特性,提取信号的相位特征,结合波阻抗能量分析方法,可以对锚固系统中的锚固缺陷进行准确定位。讨论了这种方法的实现过程,三峡工程实际应用验证了该方法是可行的。The existence of various defects in the bolt bonding system results in acoustic wave energy attenuation, phase aberration and frequency scattering. With wavelet timefrequency analysis and its energycollecting method, the phase properties of the signal can be extracted. Helped by the method of wave impedance analysis, we can accurately locate the defects in the bolt bonding system. The application of this technique to the Three Gorges Project has demonstrated its effectiveness.

关 键 词：锚固质量 无损检测 小波 时频分析 波阻抗分析 

分 类 号：TV223.34[水利工程—水工结构工程] TU472.6[建筑科学—结构工程]