Wave Velocity and Power Spectral Density of Hole-Containing Specimens with Different Moisture Content under Uniaxial Compression

Tian-jun Zhang, Lei Zhang, Shu-gang Li, Jia-lei Liu, Hong-yu Pan and Xiang Ji
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Tian-jun Zhang: College of Science, Xi’an University of Science and Technology, Xi’an 710054, China
Lei Zhang: School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Shu-gang Li: School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Jia-lei Liu: College of Science, Xi’an University of Science and Technology, Xi’an 710054, China
Hong-yu Pan: School of Safety Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Xiang Ji: College of Science, Xi’an University of Science and Technology, Xi’an 710054, China

Energies, 2018, vol. 11, issue 11, 1-13

Abstract: The gas drainage borehole is a typical hole-containing structure, and its failure is similar to the hole-containing specimen. To study the characteristics of wave velocity and power spectral density of the hole-containing specimens with different moisture content, an ultrasonic test of the hole-containing specimens during destruction was carried out. A waveform with different moisture contents was recorded by the RSM-SY7 system. The wave velocity and power spectral density was calculated to analyze its relationship with moisture content and degree of damage. The results show that the wave velocity of the hole-containing specimens gradually decreases during the destruction. There were 3 stages of attenuation of wave velocity during the destruction, which were stable, slightly reduced, and rapidly decreasing stages. Changes in moisture content would cause changes of duration of the three stages. The power spectral density gradually decreases during the destruction. The moisture content affected the attenuation mode of the power spectral density and the amount of attenuation. In the detecting of the gas borehole, the wave velocity and the power spectral density can be used to locate the damage area. This research provides a theoretical basis for detection engineering.

Keywords: hole-containing specimens; uniaxial compression; acoustic wave velocity; power spectral density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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