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首页> 外文会议>2011 International Conference on Electronics and Optoelectronics >Exploration of non-destructive testing of anchorage quality of metal anchored bar system with ultrasonic guided wave
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Exploration of non-destructive testing of anchorage quality of metal anchored bar system with ultrasonic guided wave

机译：超声波导波对金属锚杆系统锚固质量无损检测的探索

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摘要

This paper manages to perform non-destructive testing of anchored integrity of metal bar in anchored bar system by use of ultrasonic guided wave through theoretical analysis, simulation analysis and experimental study of the properties of guided wave propagating in the metal bar of anchored bar system. The theoretical models of free bar and end anchored bar are established for anchored bar system. In combination with boundary conditions, etc., the time domain response for the displacement, velocity and acceleration of propagation of ultrasonic guided wave are solved and obtained. Based on this model, the parameters that affect the anchorage quality of anchored bar are analyzed. Furthermore, theoretical curve was compared with finite element simulation curve. The two curves are in good agreement, which justifies that the theoretical model can correctly reflect the vibration properties of anchored bar and the propagation law of guided wave. By means of experimental studies, quantitative analysis was performed as to the properties of ultrasonic guided wave propagating in the metal bar of anchorage system, subsequent to which the general law of the wave velocity change and amplitude decay is deduced in respect of longitudinal ultrasonic guided waves of different frequencies propagating in anchored bars of same size or different sizes. Under the same conditions, waves at high frequency propagates faster than ones at low frequency, but the former's energy attenuates quicker than the latter's. And the decay extent of their amplitude can be used to qualitatively determine the anchorage quality of metal anchored bar.
机译：本文通过理论分析，仿真分析和锚固系统金属导波传播特性的实验研究，利用超声波导波对锚固系统中的锚固完整性进行了无损检测。建立了锚杆系统的自由杆和端锚杆的理论模型。结合边界条件等，求解并获得了超声导波的位移，速度和传播加速度的时域响应。基于该模型，分析了影响锚杆锚固质量的参数。此外，将理论曲线与有限元模拟曲线进行了比较。两条曲线吻合良好，说明理论模型能够正确反映锚杆的振动特性和导波的传播规律。通过实验研究，对锚固系统金属棒中超声导波的传播特性进行了定量分析，然后推导了纵向超声导波的波速变化和振幅衰减的一般规律。在相同大小或不同大小的锚杆中传播的不同频率。在相同条件下，高频波的传播速度要快于低频波，但前者的能量衰减要快于后者。其幅度的衰减程度可以用来定性确定金属锚杆的锚固质量。

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