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金属矿山 ›› 2013, Vol. 42 ›› Issue (11): 119-122.

• 机电与自动化 • 上一篇    下一篇

20~1 000 kHz超声导波用于锚杆锚固质量检测的探索

廖霖,张昌锁,柳明,张胜利,王银涛   

  1. 太原理工大学矿业工程学院
  • 出版日期:2013-11-15 发布日期:2014-01-26
  • 基金资助:

    * 高等学校博士学科点专项科研基金项目(编号:20121402 110013)。

Discussion on 20~1 000 kHz Ultrasonic Guided Wave in the Anchoring Quality Inspection

Liao Lin,Zhang Changsuo,Liu Ming,Zhang Shengli,Wang Yingtao   

  1. College of Mining Engineering,Taiyuan University of Technology
  • Online:2013-11-15 Published:2014-01-26

摘要: 为使超声波无损检测技术应用于锚杆锚固质量的检测,采用理论分析和实验室测试的方法对超声导波在锚杆中的传播规律进行了研究。在20~1 000 kHz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群速度随频率变化曲线。研究结果表明:频率较低时,同一频率导波在不同锚固质量的锚杆传播的群速度不一样,可用于锚杆锚固质量的检测;频率较高时,它们的群速度几乎一致,可用来检测锚固锚杆的长度,但存在一些可用于锚杆锚固质量检测的导波。

关键词: 超声导波, 锚杆, 无损检测, 群速度

Abstract: In order to apply the technology of Ultrasonic NDT in the Anchoring quality testing,this paper did a research in the propagation of the Guided wave in the bolt,using the method of theoretical analysis and laboratory testingIn 20~ 1 000 kHz guided wave frequency range,the quality of different anchoring bolt were swept,and the group velocity vsfrequency was obtained according to the experimental resultsThe research shows that,at lower frequency,the group velocity of the same frequency guided wave is not the same in the different quality anchor bolt propagation,and it can be used for the anchoring quality testing; while at higher frequencies,their group velocity is almost the same,and it can be used to detect the length of the anchor boltBut there exists some guided wave that can test anchoring quality.

Key words: Ultrasonic guided wave, Rock bolts, Nondestructive testing, Group velocity