TY - GEN
T1 - Wave propagation in fluid loaded thin walled waveguides
AU - Mazzotti, Matteo
AU - Cuadra, Jefferson
AU - Kontsos, Antonios
AU - Bartoli, Ivan
N1 - Publisher Copyright:
Copyright © 2015 by DEStech Publications, Inc. All rights re served.
PY - 2015
Y1 - 2015
N2 - A mathematical formulation is presented to compute the dispersion characteristics of tubular thin walled waveguides with arbitrary shape that are in contact with perfect fluids. The wave propagation problem is described in the frequency-wavenumber domain by using a Semi-Analytical Finite Element (SAFE) formulation for the thin walled waveguide and a regularized 2.5D Boundary Element Method (BEM) for the fluid. The wave dispersive equation is obtained by imposing continuity and equilibrium conditions on the fluid-structure interface, where the generalized Snell-Descartes law is also enforced, resulting into a nonlinear eigenvalue problem in the complex axial wavenumber. Leaky and non-leaky poles are then found by means of a contour integral algorithm. Two numerical examples are finally presented in order to show the accuracy of the method, consisting in a fluid-filled pipe and an immersed tubular section of rectangular shape.
AB - A mathematical formulation is presented to compute the dispersion characteristics of tubular thin walled waveguides with arbitrary shape that are in contact with perfect fluids. The wave propagation problem is described in the frequency-wavenumber domain by using a Semi-Analytical Finite Element (SAFE) formulation for the thin walled waveguide and a regularized 2.5D Boundary Element Method (BEM) for the fluid. The wave dispersive equation is obtained by imposing continuity and equilibrium conditions on the fluid-structure interface, where the generalized Snell-Descartes law is also enforced, resulting into a nonlinear eigenvalue problem in the complex axial wavenumber. Leaky and non-leaky poles are then found by means of a contour integral algorithm. Two numerical examples are finally presented in order to show the accuracy of the method, consisting in a fluid-filled pipe and an immersed tubular section of rectangular shape.
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U2 - 10.12783/shm2015/113
DO - 10.12783/shm2015/113
M3 - Conference contribution
AN - SCOPUS:84945555866
T3 - Structural Health Monitoring 2015: System Reliability for Verification and Implementation - Proceedings of the 10th International Workshop on Structural Health Monitoring, IWSHM 2015
SP - 896
EP - 903
BT - Structural Health Monitoring 2015
A2 - Chang, Fu-Kuo
A2 - Kopsaftopoulos, Fotis
PB - DEStech Publications
T2 - 10th International Workshop on Structural Health Monitoring: System Reliability for Verification and Implementation, IWSHM 2015
Y2 - 1 September 2015 through 3 September 2015
ER -