高频纵向导波在锚杆检测中的应用
The Application of High-frequency Longitudinal Guided Wave in Anchor Bolt Detection
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摘要: 为了超声波无损检测技术能更好的应用于支护锚杆的检测,采用理论分析和实验室测试的方法对锚固和自由锚杆中的高频纵向导波传播规律进行了研究,在1~15 MHz导波频率范围内,对不同锚固质量的锚固锚杆进行了扫频,并根据实验结果得出了平均振幅比随频率变化曲线,与理论衰减频散曲线相吻合。Abstract: In order to make ultrasonic nondestructive testing technology can be better applied in the detection of support anchor bolt, the theoretical analysis and laboratory testing methods are used to study high-frequency guided wave propagation in the anchor bolt and free bolt. Among the guided wave frequency range which is between 1 and 15 MHz, frequency swept are carried out for anchor bolts with different anchorage quality, average amplitude ratio curve which varies with different frequency is worked out from the testing results. The ratio coincides with the theoretical attenuation dispersion curves.
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