Paper Title:

The Effects of Blockage on the Propagation of Acoustic Waves in the Liquid-Shell Coupled System

Periodical Key Engineering Materials (Volumes 413 - 414)
Main Theme Damage Assessment of Structures VIII
Edited by F. Chu, H. Ouyang, V. Silberschmidt, L. Garibaldi, C.Surace, W.M. Ostachowicz and D. Jiang
Pages 327-333
DOI 10.4028/
Citation Wen Bo Duan et al., 2009, Key Engineering Materials, 413-414, 327
Online since June, 2009
Authors Wen Bo Duan, Feng Shou Gu, Iain Dupère, Shan Zhong, Andrew Ball
Keywords Blockage Detection, Fluid Coupling System, Reflection Characteristic, Structure Coupling System, Transmission Characteristics
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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.

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