The Propagation of Symmetric Lamb Wave in the Hollow Cylinder
Myshkin, Yu. V., Murav’eva, O. V., Fotina, A. A., Chukhlanceva, T. S.
Article language: English
Abstract. The article presents studies of the propagation velocity of the symmetric Lamb wave in a pipe with a diameter of 247 mm and a wall thickness of 8.4 mm. Studies include finite element modeling of the wave propagation process and an experiment using piezoelectric transducers with dry point contact based on sounding 600 mm of pipe at a frequency of 50 kHz. Plots of displacement components at wave propagation in the axial and circumferential directions are obtained, which show the prevalence of the longitudinal component over the vertical shear component from 6 to 30 times. The difference in the wave velocity at its propagation in the axial and circumferential directions was established, which amounted to 290 m/s. The simulation results are in satisfactory agreement with the ex-perimental data.
Keywords: Lamb wave, hollow cylinder, wave velocity, finite element method, dry point contact, guided wave testing, geometric dispersion
Pages: 85–97Total pages: 13
Funding, support: This work was supported by the Russian Science Foundation (Project No. 18-79-10122) using Universal Scientific Unit “Information-measuring complex for evaluation acoustic properties of materials and products” (reg. No. 586308).
Year of publication: 2019