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https://hdl.handle.net/10316/108329
Título: | A 2.5D spectral approach to represent acoustic and elastic waveguides interaction on thin slab structures | Autor: | Cruz-Muñoz, F.J. Romero, A. Tadeu, A. Galvín, P. |
Palavras-chave: | Fluid waveguide; solid waveguide; two-and-a-half dimension; spectral element method; acoustic; shear locking | Data: | 2017 | Editora: | Elsevier | Projeto: | Spanish Ministry of the Economy and Competitiveness (Ministerio de Econom´ıa y Competitividad) through research project BIA2013-43085-P and BIA2016-75042-C2-1- R POCI-01-0247-FEDER-003344, funded by Portugal 2020 through the Operational Programme for Competitiveness Factors (COMPETE 2020) Andalusian Scientific Computing Centre (CICA) |
Título da revista, periódico, livro ou evento: | Procedia Engineering | Volume: | 199 | Resumo: | In this paper, we propose a spectral element method (SEM) to study guided waves in coupled problems involving thin-walled structures and fluid-acoustic cavities. The numerical method is based on the subdomain decomposition of the fluid-structure system. Two spectral elements are developed to represent the fluid and the structure. A plate element based on a mixed Reissner-Mindlin and Kirchhoff-Love formulation is proposed to represent the thin-walled structure. This element uses C0 approximation functions to overcome the difficulties to formulate elements with arbitrary order from C1 functions. The proposed element uses a substitute transverse shear strain field resulting free shear locking. The fluid element is derived from the Helmholtz equation. These elements use Lagrange polynomials as shape functions at the Legendre-Gauss-Lobatto (LGL) points. The analysis is carried out by a two-and-a-half dimension (2.5D) approach in the wavenumber-frequency domain. The guided wave in a fluid cavity with a flexible side is analysed. | URI: | https://hdl.handle.net/10316/108329 | ISSN: | 18777058 | DOI: | 10.1016/j.proeng.2017.09.362 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Eng.Civil - Artigos em Revistas Internacionais |
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Ficheiro | Descrição | Tamanho | Formato | |
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A 2.5D spectral approach to represent acoustic and elastic waveguides interaction on thin slab structures.pdf | 936.41 kB | Adobe PDF | Ver/Abrir |
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