TY - GEN
T1 - Robust 2D-Spatial Fourier Transform Identification of Wavenumber-Space Characteristics of a Composite Plate
AU - Ramzi, Lajili
AU - Chikhaoui, K.
AU - Bouazizi, M. L.
AU - Bisharat, A.
N1 - Publisher Copyright:
© 2020, Springer Nature Switzerland AG.
PY - 2020
Y1 - 2020
N2 - This paper addresses the issue of wave propagation features in a honeycomb sandwich plate over a broadband frequency range. The special emphasis putted on such materials is due to their growing industrial integration resulting from interesting mechanical and material properties, such as high energy dissipation and resistance/weight ratio. A two-dimensional spatial Discrete Fourier Transform (2D-DFT) is employed with experimentally measured displacement field, as primary input, to identify a complete wave propagation direction-dependent dispersion equation of the sandwich plate. Valuable insights into the wavenumber-space (k-space) profiles, in relation with the structural orthotropic behavior, are highlighted. The 2D-DFT method is proved to be efficient in a deterministic framework. Nevertheless, its robustness against input parameters’ uncertainty needs to be evaluated as well to achieve more realistic k-space characteristics’ identification. The impact of measurement points’ localization’s uncertainty on the 2D-DFT identifications is statistically investigated. The obtained results show the large variability of the identified k-space parameters and reveal the important identification sensitivity to such measuring errors involved in the experimental manipulations.
AB - This paper addresses the issue of wave propagation features in a honeycomb sandwich plate over a broadband frequency range. The special emphasis putted on such materials is due to their growing industrial integration resulting from interesting mechanical and material properties, such as high energy dissipation and resistance/weight ratio. A two-dimensional spatial Discrete Fourier Transform (2D-DFT) is employed with experimentally measured displacement field, as primary input, to identify a complete wave propagation direction-dependent dispersion equation of the sandwich plate. Valuable insights into the wavenumber-space (k-space) profiles, in relation with the structural orthotropic behavior, are highlighted. The 2D-DFT method is proved to be efficient in a deterministic framework. Nevertheless, its robustness against input parameters’ uncertainty needs to be evaluated as well to achieve more realistic k-space characteristics’ identification. The impact of measurement points’ localization’s uncertainty on the 2D-DFT identifications is statistically investigated. The obtained results show the large variability of the identified k-space parameters and reveal the important identification sensitivity to such measuring errors involved in the experimental manipulations.
KW - Experiments
KW - Honeycomb sandwich plate
KW - K-space
KW - Spatial fourier transform
KW - Uncertainties
KW - Wide-band identification
UR - https://www.scopus.com/pages/publications/85083005843
U2 - 10.1007/978-3-030-27146-6_29
DO - 10.1007/978-3-030-27146-6_29
M3 - Conference contribution
AN - SCOPUS:85083005843
SN - 9783030271459
T3 - Lecture Notes in Mechanical Engineering
SP - 271
EP - 281
BT - Design and Modeling of Mechanical Systems - IV - Proceedings of the 8th Conference on Design and Modeling of Mechanical Systems, CMSM 2019
A2 - Aifaoui, Nizar
A2 - Affi, Zouhaier
A2 - Benamara, Abdelmajid
A2 - Chouchane, Mnaouar
A2 - Abbes, Mohamed Slim
A2 - Walha, Lassad
A2 - Haddar, Mohamed
A2 - Chaari, Fakher
A2 - Romdhane, Lotfi
PB - Springer Science and Business Media Deutschland GmbH
T2 - 8th International Congress on Design and Modeling of Mechanical Systems, CMSM 2019
Y2 - 18 March 2019 through 20 March 2019
ER -