In order to investigate the behavior of guided waves across the
elbows, the FE simulation is introduced here for modeling the
propagation of fundamental L (0, 2) mode of different pipe configurations.
Here, full three-dimensional models included space-Z
type, U type, and plane-Z type are established in the dynamic simulation
module LS-DYNA of FE software ANSYS for analysis of
wave propagation. The mesh used in the models consisted of 3D
solid 164 element which ensures a converged solution for elastic
wave propagation. Thirty-two elements along the circumferential
and 5-mm long element along the axial direction are selected,
while elements in the bend part are refined, to make the grid
even. After that, the axisymmetric guided waves L (0, 2) are
excited through the identical longitudinal force in axial direction
at the 32 circumferential nodes of one end of the pipe (as shown
in Fig. 1). A ten-cycle sinusoidal tone burst with 100 kHz center
In order to investigate the behavior of guided waves across theelbows, the FE simulation is introduced here for modeling thepropagation of fundamental L (0, 2) mode of different pipe configurations.Here, full three-dimensional models included space-Ztype, U type, and plane-Z type are established in the dynamic simulationmodule LS-DYNA of FE software ANSYS for analysis ofwave propagation. The mesh used in the models consisted of 3Dsolid 164 element which ensures a converged solution for elasticwave propagation. Thirty-two elements along the circumferentialand 5-mm long element along the axial direction are selected,while elements in the bend part are refined, to make the grideven. After that, the axisymmetric guided waves L (0, 2) areexcited through the identical longitudinal force in axial directionat the 32 circumferential nodes of one end of the pipe (as shownin Fig. 1). A ten-cycle sinusoidal tone burst with 100 kHz center
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