Characterization of an experimental wavenumber fitting method for loss factor estimation using a viscoelastically damped structure

Palan, Vikrant; Shepard, W. Steve; McDaniel, J. Gregory

doi:10.1016/j.jsv.2005.07.028

Cited by 2 publications

(5 citation statements)

References 6 publications

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“…To explain these effects, one can use the equivalent slenderness ratio defined in Eq. (8). At low frequencies, this ratio is large (µ(100 Hz) 42) and the beam behaves as a thin beam.…”

Section: Resultsmentioning

confidence: 98%

“…Mc Daniel suggested [7,8] to identify simultaneously the four waves derived from the bending operator (Eq. (2b), Eq.…”

Section: Bending Waves's Four Poles: the MC Daniel Methodsmentioning

confidence: 99%

“…(3)). The algorithm is then free to identify from one to eight waves of different wavenumbers (R ∈ [ [ 1,8 ]]). The choice is automated with the ESTER criterion.…”

Section: Snrmentioning

confidence: 99%

“…Thanks to this major improvement, non-destructive structural characterisation methods have been developed [1,2,3,4]. Some of them focus on the identification of structural waves in the medium frequency domain [5,6,7,8,9]. These methods aim at filling the gap between low-frequency methods, (Oberst [10,11], modal analysis [12,13,14,15,16] or Dynamical Mechanical Analysis (DMA) [17]) and ultrasonic testing [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

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High Resolution Wavenumber Analysis (HRWA) for the mechanical characterisation of viscoelastic beams

Margerit¹,

Lebée²,

Caron³

et al. 2018

Journal of Sound and Vibration

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The High-Resolution Wavenumber Analysis (HRWA) is presented. It identifies complex wavenumbers and amplitudes of waves composing the harmonic response of a beam. Based on the frequency dependence of these wavenumbers, experimental dispersion branches corresponding to various beam motions (e.g bending, torsion) can be retrieved. The HRWA method is compared to the Mc Daniel and the Inverse Wave Correlation (IWC) methods. It overcomes some drawbacks of these methods: the wavenumber resolution is enhanced. Also, the wavenumber search problem is expressed as a linear problem, making the method computationally efficient. A number of wavenumbers can be identified automatically, thanks to a statistical criterion. First, the noise sensitivity of each method is investigated in the basis of synthesised measurements. For this criterion, the HRWA and Mc Daniel method performances are close and much better than IWC. Moreover, the HRWA is five to twenty times faster to compute than other methods, depending on the mesh size. Second, an experimental case is presented where bending and torsion waves are identified, yielding an apparent viscoelastic Young and shear moduli on a wide-frequency range.

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“…To explain these effects, one can use the equivalent slenderness ratio defined in Eq. (8). At low frequencies, this ratio is large (µ(100 Hz) 42) and the beam behaves as a thin beam.…”

Section: Resultsmentioning

confidence: 98%

“…Mc Daniel suggested [7,8] to identify simultaneously the four waves derived from the bending operator (Eq. (2b), Eq.…”

Section: Bending Waves's Four Poles: the MC Daniel Methodsmentioning

confidence: 99%

“…(3)). The algorithm is then free to identify from one to eight waves of different wavenumbers (R ∈ [ [ 1,8 ]]). The choice is automated with the ESTER criterion.…”

Section: Snrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Resolution Wavenumber Analysis (HRWA) for the mechanical characterisation of viscoelastic beams

Margerit¹,

Lebée²,

Caron³

et al. 2018

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

“…Montalvao [5] noted a variability over the estimation of structural parameters depending on the clamping conditions. Close to these modal methods, other methods are based on the identification of the natural wavenumber of the structure, from which structural parameters can be extracted [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental identification of homogenized traction and bending complex Young’s modules using a local dynamic inverse method on a sandwich curved beam

Bottois

Ablitzer

Audrain

et al. 2021

Journal of Sound and Vibration

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Characterization of an experimental wavenumber fitting method for loss factor estimation using a viscoelastically damped structure

Cited by 2 publications

References 6 publications

High Resolution Wavenumber Analysis (HRWA) for the mechanical characterisation of viscoelastic beams

High Resolution Wavenumber Analysis (HRWA) for the mechanical characterisation of viscoelastic beams

Experimental identification of homogenized traction and bending complex Young’s modules using a local dynamic inverse method on a sandwich curved beam

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