Numerical and experimental investigation on broadband wave propagation features in perforated plates. (15th June 2016)

• Record Type: Journal Article
• Authors: Zhou, C.W.; Lainé, J.P.; Ichchou, M.N.; Zine, A.M.
• Is Part Of: Mechanical systems and signal processing. Volume 75(2016)
• Page Start: 556
• Page End: 575
• Publication Date: 2016-06-15
• Subjects: Perforated plate -- Wave propagation -- Wave Finite Element Method -- Homogenization approach; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2015.12.006
• Languages: English
• ISSNs: 0888-3270

Abstract

Abstract: Perforated plates are widely used in various engineering applications. Their mechanical and dynamical behaviours need to be investigated for the design and optimization purpose. In this work, the wave propagation features on broadband in perforated plates are predicted by a Condensed Wave Finite Element Method (CWFEM). Based on the wave dispersion relation identified by CWFEM, wave-based homogenization methods are proposed to define equivalent solid plates. Three perforated plates with different penetration patterns and hole shapes are considered and the accuracy of the equivalent homogenized model is illustrated by comparing it with finite element method. Experimental validation of the computed wave propagation characteristics on the two models is provided as well. A good correlation is observed not only at low frequency where homogenized model can be found, but also at mid and high frequency, where the wave beaming effect phenomenon occurs. Abstract : Highlights: Wave propagation in perforated plates are analyzed. A wave propagation approach is employed numerically. An experimental extraction of wave propagation features is considered. Homogenized modeling of perforated plate is further considered. Analytical/Numerical/Experimental comparisons are provided for perforated plates dynamics.