The Effects of Blockage on the Propagation of Acoustic Waves in the Liquid-Shell Coupled System
The free vibration of a fluid/structure system consisting of a cylindrical blockage submerged in a liquid enclosed by a cylindrical shell is investigated for the purpose of pipe line transportation monitoring. The wavenumbers are obtained and the reflection and transmission characteristics of these waves at the blockage interfaces are investigated theoretically. Reflection and transmission ratios are obtained in the axisymmetric mode, as functions of frequency. High order modes play an important role in the near field of the discontinuity and are taken into account.
F. Chu, H. Ouyang, V. Silberschmidt, L. Garibaldi, C.Surace, W.M. Ostachowicz and D. Jiang
W. B. Duan et al., "The Effects of Blockage on the Propagation of Acoustic Waves in the Liquid-Shell Coupled System", Key Engineering Materials, Vols. 413-414, pp. 327-333, 2009