基于小波包分析的锚杆系统声频应力波传播特性研究

Sonic Frequency Stress Wave Propagation Characteristics Research of Anchor System Based on Wavelet Packet Analysis

本文采用小波包分解与重构的方法分析了仿真得到的完整和缺陷锚固系统声频应力波速度响应曲线,根据重构应力波速度响应曲线的反射时间计算了锚杆的长度及缺陷位置,验证了该方法的准确性;在此基础上,对于模型实验结果进行了分析,进一步验证了该方法的合理性。本研究方法为无法直接判别反射信号的时间位置的应力波响应提供了一种灵活可靠的方法。

Wavelet packet decomposition and reconstruction method was used to analyze the velocity response curve of stress wave obtained with the simulation of intact and defective anchorage system. Achor length and defect position were calculated based on the reconstructed velocity response curve of stress wave. The accuracy of this method was also verified. On this basis,the experimental results were ana- lyzed, which further verify the rationality of the method was verified. This method provides a flexible and reliable method for stress wave response which cannot distinguish the time position of reflected signal directly.