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Journal ArticleDOI

Three‐Dimensional Investigation of the Propagation of Waves in Hollow Circular Cylinders. II. Numerical Results

Denos C. Gazis
- 01 May 1959 - 
- Vol. 31, Iss: 5, pp 573-578
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TLDR
In this article, the results of a numerical evaluation of a characteristic equation derived in Part I, appropriate to free harmonic waves propagated along a hollow cylinder of infinite extent, were given for some representative cylinders covering the entire range from thin shells to solid cylinders.
Abstract: 
The results are given of a numerical evaluation of a characteristic equation derived in Part I, appropriate to free harmonic waves propagated along a hollow cylinder of infinite extent. This equation is evaluated for some representative cylinders covering the entire range from thin shells to solid cylinders, and the results are compared with the corresponding results of a shell theory. Observations are made regarding the variation of the frequency spectrum with the physical parameters, as well as the range of applicability of shell theories.

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Dissertation

Étude numérique de la propagation des ondes guidées ultrasonores par la méthode de Galerkin discontinue : application au contrôle non-destructif dans le domaine des transports

Salah-Eddine Hebaz
TL;DR: In this paper, the methode semi-analytique elements finis de Galerkin discontinue for the determination des courbes de dispersion des ondes guidees est developpee.
Journal ArticleDOI

Dispersion and Attenuation of Guided Waves in Tubular Section with Multi-Layered Viscoelastic Coating — Part II: Circumferential Wave Propagation

Chi-Wei Kuo, +1 more
- 20 Apr 2017 - 
TL;DR: In this article, the authors derived the dispersion and attenuation characteristic equations by incorporating a complex, frequency-dependent constitutive law for the viscoelastic coating material and implemented continuous displacement boundary conditions to model perfect interfacial bonds between the tubular section and applied epoxy coatings.
Journal ArticleDOI

Optimizing the placement of piezoelectric wafers on closed sections using a genetic algorithm - Towards application in structural health monitoring.

Zainab Ismail, +2 more
- 01 Sep 2021 - 
TL;DR: In this article, the authors proposed an optimization model for piezoelectric (PZT) wafer placement on curved structures and closed sections, where sensors were spread on the circumference of the structure rather than mounting them in the form of rings or axial lines.
Journal ArticleDOI

Acoustic breathing mode frequencies in cylinders, cylindrical shells and composite cylinders of general anisotropic crystals: Application to nanowires

D. Martínez-Gutiérrez, +1 more
- 01 Dec 2013 - 
TL;DR: The work in this paper was partially supported by the Spanish Ministerio de Economia y Competitividad through Grant MAT2009-14578-C03-03. D.M.-G.acknowledges financial support from the FPI program of the Spanish government.
Dissertation

Modelling borehole wave signatures in elastic and poroelastic media with spectral method

Florian Karpfinger
TL;DR: In this paper, the authors used the so-called tube wave or Stoneley wave to characterize the formation and completion properties of hydrocarbon or water reservoirs, which can provide direct information about rock physical parameters such as permeability or elastic moduli.