Propagation of Guided Waves in Coated Tubes used in Off-Shore Oil In- dustry

Resumo

This work applies acoustic emission methods to monitor pipes’ integrity and mechanical behavior in
the offshore oil industry, which cannot be inspected visually because they are usually covered with a polymeric
layer to mitigate impact loadings. The elastodynamic response of such a pipe is studied through dispersion curve
charts, implemented with commercial finite element packages: one based on the modal analysis of an axisymmetric
model, and the other using periodic boundary conditions over a 3D model. Both curves are compared to analytical
models based on the classical theories of beam-shaft-bar structures, with effective properties obtained by Voigt
theory, leading to an in-depth discussion about the corresponding mechanical behavior of the overall structure.