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Low frequency axisymmetric longitudinal guided waves in eccentric annular cylinders
Roson Kumar Pattanayak, Prabhakaran Manogharan, ,
Published in Acoustical Society of America
2015
Volume: 137
   
Issue: 6
Pages: 3253 - 3262
Abstract
This paper studies the effect of axially uniform eccentricity on the modal structures and velocities of the lower order axisymmetric guided wave mode L(0,2) in circular tubes or pipes. The semi-analytical finite element method is mainly used, supported by fully three-dimensional finite element models and validated using experiments. The studies show that even a small eccentricity in the pipe can cause a loss in the L(0,2) mode axisymmetry, leading to its confinement in the thinned side of the pipe cross-section and also a reduction in mode velocities. The physics of this phenomenon is related to the feature-guiding and mode confinement effects noted in recent years in the literature, particularly studies on waveguides with local cross-section variations and curvature. © 2015 Acoustical Society of America.
About the journal
JournalJournal of the Acoustical Society of America
PublisherAcoustical Society of America
ISSN00014966
Open AccessNo
Concepts (10)
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    Guided electromagnetic wave propagation
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    AXISYMMETRIC GUIDED WAVES
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    Circular tubes
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    Confinement effects
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    ECCENTRIC ANNULAR
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    MODAL STRUCTURES
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    MODE VELOCITY
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    SEMI-ANALYTICAL FINITE ELEMENT METHODS
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    Three dimensional finite element model
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    Finite element method