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Viscoelastic constrained layer damping is a simple and efficient method for reducing noise, vibration, and fatigue in metal structures. In this work, a spectral collocation method utilizing a layer-wise plate theory was established to inspect the vibration characteristics of a sandwich plate with a viscoelastic core. The displacements of each layer satisfied the Mindlin plate theory. The core's transverse shear stress remained constant. The three layers’ transverse displacements were assumed to be identical. The displacement fields were reduced to nine variables by utilizing the interfaces’ continuity of the displacements. The equations of motion were obtained by utilizing Hamilton’s principle. The viscoelastic core’s material properties were considered as frequency-dependent. To address the complex eigenvalue problem, an iterative algorithm was used. The theoretical results were compared with published13theoretical and experimental data for fully clamped rectangular sandwich plates to validate the proposed method. The modified Oberst beam method was applied by fitting the impulse response function to obtain the adhesive’s frequency-dependent storage 16modulus and loss factor. The natural frequencies and corresponding loss factors of three sandwich plates with different adhesives were measured by conducting impact tests. The numerical results from the present the oretical method agreed well with the measured results.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: Sandwich plate , Viscoelastic core , Spectral collocation method, Hamilton’s principle, Modified Oberst beam method, Impulse response function (IRF)

刊行年月日: 2024-03-12

出版者: Elsevier BV

掲載誌:

• Composite Structures (ISSN: 02638223) vol. 337 118024

研究助成金:

• Core Research for Evolutional Science and Technology
• Japan Science and Technology Agency JPMJCR19J3

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.compstruct.2024.118024

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更新時刻: 2024-09-30 16:30:09 +0900

MDRでの公開時刻: 2024-09-30 16:30:10 +0900