Ponencia
A 2.5D spectral approach to represent acoustic and elastic waveguides interaction on thin slab structures
Autor/es | Cruz-Muñoz, Francisco Javier
Romero Ordóñez, Antonio Tadeu, Antònio Galvín, Pedro |
Departamento | Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras |
Fecha de publicación | 2017 |
Fecha de depósito | 2018-05-18 |
ISBN/ISSN | 1877-7058 |
Resumen | 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 ... 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 ReissnerMindlin 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. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España |
Identificador del proyecto | BIA2013-43085-P
BIA2016-75042-C2-1-R |
Cita | Cruz-Muñoz, F.J., Romero Ordóñez, A., Tadeu, A. y Galvín, P. (2017). A 2.5D spectral approach to represent acoustic and elastic waveguides interaction on thin slab structures.En 10th International Conference on Structural Dynamics, EURODYN 2017. Procedia Engineering, 199, 1374-1379. |
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