基于HHT信号分析的GFRP锚杆锚固质量无损检测方法研究

doi:10.13722/j.cnki.jrme.2020.0630

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Abstract Aiming to optimize the retrieval and analysis process of non-destructive testing(NDT) of GFRP anchorage system in earthen sites，the Hilbert-Huang transform(HHT)method was used in this study to analyze the test signals of various intact and defective anchoring models. In the process of analysis，the noise in the detected signal is firstly eliminated by Butterworth filter method，and then the signal after denoising is analyzed by Fourier and HHT methods successively. It is found that this method can clearly identify the defect and the reflection signal of the bottom of the rod，so as to reverse the defect position and the anchorage length more accurately. It is also shown that the pulp defect length，reversed according to the difference of the reflection times of complete and defect models，is accordance with the given conditions. The results provide a systematic analysis scheme for the inversion of the anchorage length of soil GFRP and the location and size of the pulp defect.

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soil mechanics earthen sites GFRP bolts non-destructive testing(NDT) Hilbert-Huang transform (HHT) anchorage length ')" href="#">defect location

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	Articles by authors
	ZHANG Jingke1
	2
	LI Kai3
	ZHANG Han1
	2
	WANG Nan1
	2
	GUO Qinglin4
	ZHAO Linyi4

Cite this article:

ZHANG Jingke1,2,LI Kai3, et al. Research on non-destructive testing method of GFRP bolts based on HHT signal analysis[J]. , 2021, 40(7): 1460-1472.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0630 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I7/1460

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