基于锚杆构件振动响应特征的锚杆轴力无损检测方法

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摘要锚杆轴力测量对评价围岩稳定性具有重要意义。采用接触力学理论建立了锚杆构件振动频率与锚杆轴力关系模型，开展了锚杆锚固系统振动试验。通过采集螺母和托盘的振动响应信号，对不同受力条件下螺母和托盘的非线性振动特性进行了分析，获得了螺母和托盘振动频率与轴力关系；提出了基于螺母和托盘非线性振动特性的实时轴力无损检测方法。试验结果表明：随着锚杆轴力增加，螺母和托盘振动频率呈非线性增加，螺母频率大于托盘，托盘频率的增长率大于螺母；且二者振动频率增长趋势与轴力大小均为单值映射关系，通过测量螺母和托盘的振动频率可以实现锚杆轴力的无损检测。

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	王宇赛1
	张凯2
	肖方园1
	曹恒1
	张梦宇1

关键词 ：非线性振动, 振动频率, 锚杆构件, 轴力无损检测

Abstract：Measuring the anchor rod's axial force helps determine surrounding rock stability. The relationship model between bolt vibration frequency and axial force was constructed based on contact mechanics theory, and a vibration test of the anchor anchoring system was conducted. By collecting vibration signals from nuts and pallets, bolts and pallets' nonlinear vibration properties under various force conditions were analyzed, and a relationship between their vibration frequencies and axial forces was obtained; a real-time nondestructive testing (NDT) method for axial force was proposed based on the bolts and pallet's nonlinear vibration. The test results show that nut and pallet vibration frequency increases non-linearly with increasing anchor axial force, nut's frequency is not lower than pallet's, and pallet's growth rate is higher than nut; the growth of both vibration frequency and axial force is a single-value mapping connection, and nut and pallet vibration can be used to detect anchor axial force non-destructively.

Key words： Nonlinear vibration frequency anchor components;nondestructive testing of axial forces

收稿日期: 2022-09-22 出版日期: 2023-07-15

引用本文:

王宇赛1，张凯2，肖方园1，曹恒1，张梦宇1. 基于锚杆构件振动响应特征的锚杆轴力无损检测方法[J]. 振动与冲击, 2023, 42(13): 119-126.
WANG Yusai1, ZHANG Kai2, XIAO Fangyuan1, CAO Heng1, ZHANG Mengyu1. Non-destructive testing method of anchor rod axial force based on vibration response characteristics of anchor rod components. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(13): 119-126.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I13/119

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