Modeling wave propagation in damped waveguides of arbitrary cross-section

Bartoli, Ivan; Marzani, Alessandro; Scalea, Francesco Lanza di; Viola, Erasmo

doi:10.1016/j.jsv.2006.01.021

Cited by 519 publications

(200 citation statements)

References 33 publications

(32 reference statements)

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“…The dispersion relation for a hollow cylinder can be solved with Global Matrix Method (GMM) [10] or Semi-analytical Finite Element Method (SAFEM) [11][12][13]. Fig.2 shows the phase velocity dispersion curves for guided waves in a pipe with geometry and material parameters given in Table 1.…”

Section: Guided Waves In Hollow Cylinders Theorymentioning

confidence: 99%

Non-destructive evaluation of spiral-welded pipes using flexural guided waves

Zhang¹,

Tang²,

Lu³

et al. 2016

AIP Conference Proceedings

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Abstract. Millions of miles of pipes are being used in both civil and industrial fields. Spiral-welded pipes, which are widely applied in fields such as drainage, architecture as well as oil and gas storage and transportation, are difficult to inspect due to their complex geometry. Guided waves have shown a great potential in Non-Destructive Evaluation (NDE) and Structural Health Monitoring (SHM) for such cases. Flexural guided waves that propagate at a helix angle relative to the axial direction of pipe, are the most appropriate modes for inspecting spiral-welded pipes. The classical Normal Mode Expansion method (NME) is adopted to disseminate the forced response and perturbation analysis of a steel pipe with respect to a time delay circular loading. A time delay circular array transducer (TDCAT) is proposed for the purpose of exciting pure flexural mode in pipes. Pure flexural mode can be excited when the time delay parameter is specifically designed. The theoretical prediction is verified by finite element numerical evaluation and spiral-welded pipe inspection experiment.

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Section: Guided Waves In Hollow Cylinders Theorymentioning

confidence: 99%

Non-destructive evaluation of spiral-welded pipes using flexural guided waves

Zhang¹,

Tang²,

Lu³

et al. 2016

AIP Conference Proceedings

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show abstract

“…For propagation in the principal directions, parallel and normal to the fiber direction, the vertically and horizontally polarized partial waves are de-coupled and behave similarly to the equivalent modes in isotropic materials. However, if the propagation is along the non-principal axis, it is no longer possible to trace the Lamb and the SH modes separately due to the coupling effect between them [10,11]. Therefore wave propagation in such composite plates is angle dependent.…”

Section: Dispersion Characteristics Of Composite Platesmentioning

confidence: 99%

Feature guided waves (FGW) in fiber reinforced composite plates with 90° transverse bends

Yu¹,

Ratassepp²,

Fan³

et al. 2016

AIP Conference Proceedings

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“…Further discussion of these models is in [13,18,38] and references therein. The SCM scheme for viscoelastic materials is similar to that used for their perfectly elastic counterparts, see for instance [21,22].…”

Section: Spectral Collocation Scheme and The Companion Matrixmentioning

confidence: 99%

“…Then, a few novel cases of the most general choice of anisotropic material, triclinic, are presented and the section finishes with a multi-layer example. Orthorhombic materials are commonly encountered in industry and have already been studied in two references given in the introduction, namely [32,38]. In the SCM context, a code for an orthorhombic medium can also be used for all those materials whose stiffness matrix has a similar block structure, such as hexagonal or isotropic; we begin by presenting an example of a viscoelastic orthorhombic plate in vacuum.…”

Section: Flat Geometrymentioning

confidence: 99%