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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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

Received: 22 September 2022 Published: 15 July 2023

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	Articles by authors
	WANG Yusai1
	ZHANG Kai2
	XIAO Fangyuan1
	CAO Heng1
	ZHANG Mengyu1

Cite this article:

WANG Yusai1,ZHANG Kai2,XIAO Fangyuan1, et al. Non-destructive testing method of anchor rod axial force based on vibration response characteristics of anchor rod components[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(13): 119-126.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I13/119

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