机构地区: 中南大学信息物理工程学院
出 处: 《物探化探计算技术》 2003年第3期241-245,共5页
摘 要: 由于锚固体系中有不同大小和程度的缺陷 ,声波在传播过程中将产生能量衰减、相位突变及频散现象。利用声波的能量特征和波阻抗分析方法 ,对锚固质量进行初步分级 ;利用相位特征和小波时频分析方法 ,对锚固系统中的锚固缺陷进行准确定位。三峡工程实际应用验证了该方法是有效的。 The existence of various lacunas in bolt bonding system will cause t he acoustic wave energy attenuation, phase aberration and frequency dispersion. According to the energy characteristics of acoustic wave, the bolt bonding in tegrity can be classified by the means of impedance analysis. With the phase pro perty and wavelet time-frequency analysis method, the lacunas in the bolt bondi ng system can be further located. The applications in Three Gorges Project have demonstrated the efficiency of the technology.