Nonlinear Ultrasonic Resonance Technique and Application in Scale Detection

doi:10.3901/JME.2016.08.043

Abstract

Abstract: According to requirement of safe operation of pressure vessels and pipelines, a nonlinear ultrasonic resonance technique is proposed. The nonlinearly elastic constitutive relation induced by hysteresis effect in nonlinear mesoscopic elastic materials is analyzed theoretically. Research shows that with the increase of amplitude of ultrasound, the nonlinear effects mainly presented as shift of resonant frequency and variation of quality factor. Nonlinear ultrasonic resonance experiments are conducted on plates with simulant scales. Research focused on the influence of amplitude of excitation on the resonant frequencies of fundamental wave and harmonics, and the hysteretic elastic nonlinearity and hysteretic dissipative nonlinearity in second harmonics are used to characterize the scaling thick. The proposed nonlinear ultrasonic resonance technique is applied for scale detection in industrial pipelines. The results show that the hysteretic elastic nonlinearity and hysteretic dissipative nonlinearity in second harmonic could be used for thick measurement of scale in pipelines. The research provides a novel method for scaling detection in industrial pipeline.

Key words: nonlinear ultrasonic, nonlinearly elastic constitutive relation, resonance spectrum, scale, second harmonic

CLC Number:

TG156

JIAO Jingpin, WU Chao, MENG Xiangji, WU Bin, HE Cunfu. Nonlinear Ultrasonic Resonance Technique and Application in Scale Detection[J]. Journal of Mechanical Engineering, 2016, 52(8): 43-50.

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