Calculation of Wave Propagation in Rib-Stiffened Plate Structures

Orrenius, Ulf; Finnveden, Svante

doi:10.1006/jsvi.1996.0565

Cited by 79 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A semi-analytical finite-element (SAFE) method, which uses finite elements to represent the cross section of the waveguide, and a harmonic description along the propagation direction, has become popular in recent years for the modal study of waveguides with irregular cross section, and has the potential for application to the case of feature-guided waves. The SAFE method was first demonstrated in 1972 (Lagasse 1972), and has been used to calculate the properties of guided waves in railway lines (Gavrić 1995;Hayashi et al 2003), beams (Wilcox et al 2002) and stiffened plates (Orrenius & Finnveden 1996). Recently, the SAFE method has been developed by Castaings & Lowe (2008) to study leaky waves that propagate along an elastic waveguide with arbitrary cross section and radiate into a solid of infinite extent.…”

Section: Introductionmentioning

confidence: 99%

Elastic waves guided by a welded joint in a plate

Fan

Lowe

2009

Proc. R. Soc. A.

View full text Add to dashboard Cite

The inspection of large areas of complex structures is a growing interest for industry. An experimental observation on a large welded plate found that the weld can concentrate and guide the energy of a guided wave travelling along the direction of the weld. This is attractive for non-destructive evaluation (NDE) since it offers the potential to quickly inspect for defects such as cracking or corrosion along long lengths of welds. In this paper, a twodimensional semi-analytical finite-element (SAFE) method is applied to provide a modal study of the elastic waves that are guided by the welded joint in a plate. This brings understanding to the compression wave that was previously observed in the experiment. However, during the study, a shear weld-guided mode, which is non-leaky and almost non-dispersive, has also been discovered. Its characteristics are particularly attractive for NDE, so this is a significant new finding. The properties for both the compression and the shear mode are discussed and compared, and the physical reason for the energy trapping phenomena is then explained. Experiments have been undertaken to validate the existence of the shear weld-guided mode and the accuracy of the FE model, showing very good results.

show abstract

Section: Introductionmentioning

confidence: 99%

Elastic waves guided by a welded joint in a plate

Fan

Lowe

2009

Proc. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…(19) plus some extra terms due to the interface conditions (32) and (33). Matrices C 12 and C 21 are sparse and carry the rest of the information of Equations (32) and (33).…”

Section: Modelling Of Multilayered Double Wallsmentioning

confidence: 99%

“…(31) adapted with the new value of the speed of sound c 2 and, on the other hand, a term related to Eq. (32) that is assembled at…”

Section: Multilayer Formulationmentioning

confidence: 99%

“…Another approach is the waveguide finite element method (WFEM) [32,4,12]. This technique, particularly suitable for structures where one dimension is clearly larger than the others, is based on the FEM discretisation of the cross-section of the structure, combined with a wave description of the vibration and pressure fields in the third dimension.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The finite layer method for modelling the sound transmission through double walls

Díaz-Cereceda

Poblet-Puig

Ferran

2012

Journal of Sound and Vibration

View full text Add to dashboard Cite

The finite layer method (FLM) is presented as a discretisation technique for the computation of noise transmission through double walls. It combines a finite element method (FEM) discretisation in the direction perpendicular to the wall with trigonometric functions in the two in-plane directions. It is used for solving the Helmholtz equation at the cavity inside the double wall, while the wall leaves are modelled with the thin plate equation and solved with modal analysis. Other approaches to this problem are described here (and adapted where needed) in order to compare them with the FLM. They range from impedance models of the double wall behaviour to different numerical methods for solving the Helmholtz equation in the cavity. For the examples simulated in this work (impact noise and airborne sound transmission), the former are less accurate than the latter at low frequencies. The main advantage of FLM over the other discretisation techniques is the possibility of extending it to multilayered structures without changing the interpolation functions and with an affordable computational cost. This potential is illustrated with a calculation of the noise transmission through a multilayered structure: a double wall partially filled with absorbing material.

show abstract

“…The derivation of the waveguide finite elements is based on Hamilton's principle. They have been considered with several purposes: (i) obtain the vibration field in infinite waveguides; (ii) describe dispersion curves of several structural typologies [5,6]; (iii) calculate the eigenmodes of the structure and afterwards use them to perform a modal analysis [7].…”

Section: Introductionmentioning

confidence: 99%

The Finite Strip Method for Acoustic and Vibroacoustic Problems

Poblet-Puig

Ferran

2011

J. Comp. Acous.

View full text Add to dashboard Cite

The finite strip method, widely employed in structural mechanics, is extended to solve acoustic and vibroacoustic problems. The acoustic part of the formulation, including how to handle the most typical acoustic boundary conditions and the fluid structure interaction, is presented. Several realistic problems where the three-dimensional domain of interest has extrusion symmetry are solved. These examples illustrate the advantages of the method: it has smaller computational costs than the finite element method and consequently the analysed frequency range can be increased.

show abstract

Calculation of Wave Propagation in Rib-Stiffened Plate Structures

Cited by 79 publications

References 0 publications

Elastic waves guided by a welded joint in a plate

Elastic waves guided by a welded joint in a plate

The finite layer method for modelling the sound transmission through double walls

The Finite Strip Method for Acoustic and Vibroacoustic Problems

Contact Info

Product

Resources

About