Advances in Civil Engineering / 2020 / Article / Fig 8

Research Article

Ultrasonic Spectrum Analysis of Granite Damage Evolution Based on Dry-Coupled Ultrasonic Monitoring Technology

Figure 8

Amplitude–frequency characteristics of ultrasonic wave after rock preloading. (a) Amplitude-frequency characteristics of CH2. (b) Amplitude-frequency characteristics of CH3. (c) Amplitude-frequency characteristics of CH4.
(a)
(b)
(c)

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