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Study of elastic wave propagation throught periodic media

Grant number: 10/17317-9
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): March 01, 2011
Effective date (End): August 31, 2015
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal Investigator:José Roberto de França Arruda
Grantee:Priscilla Brandão Silva
Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated scholarship(s):13/23542-3 - Wave finite element based approaches for vibroacoustic analysis of fluid-filled structures, BE.EP.DD   12/11809-2 - Performance optimization of hybrid FEM/SEM method for waveguide analysis, BE.EP.DD

Abstract

The project, in the field of solid mechanics, has as major objective the study of elastic waves propagation through a medium with periodic inclusions. Previous studies have shown that a good choice of material properties combined with a periodic arrangement of the structure gives rise to band gaps, i.e., intervals of frequency where waves do not propagate. As a result, these structures can be used as noise barriers and vibration isolators in a specific frequency interval. Due to several possible applications of these structures in noise and vibration control engineering, and also to the possibility of applying recently developed spectral modeling methods that have lower computational cost, such as obtaining spectral elements from finite element models of waveguide slices (WFEM),the subject becomes even more interesting.This will be developed in the Vibroacoustics Laboratory (LVA) of FEM/UNICAMP and it will be carried out in cooperation with the Department of Applied Physics of the Polytechnic University of Valencia - Campus of Gandia, in Spain. While the Department of Applied Physics in Gandia has extensive research experience on the propagation of ultrasonic waves in incompressible fluids containing periodic inclusions, LVA developed the spectral element method to model waveguides. This project intends to bring together the research experiences from these two research groups in order to enable a better understanding of the subject and allow the application of sonic (or phononic) crystals in the audio frequency range, especially in solid media. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, PRISCILLA BRANDAO; MENCIK, JEAN-MATHIEU; DE FRANCA ARRUDA, JOSE ROBERTO. Wave finite element-based superelements for forced response analysis of coupled systems via dynamic substructuring. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, v. 107, n. 6, p. 453-476, . (13/23542-3, 10/17317-9)
BELI, DANILO; SILVA, PRISCILLA BRANDAO; DE FRANCA ARRUDA, JOSE R.. Vibration Analysis of Flexible Rotating Rings Using a Spectral Element Formulation. JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, v. 137, n. 4, . (10/17317-9, 14/19054-6)
SILVA, P. B.; GOLDSTEIN, A. L.; ARRUDA, J. R. F.. Building spectral element dynamic matrices using finite element models of waveguide slices and elastodynamic equations. SHOCK AND VIBRATION, v. 20, n. 3, p. 439-458, . (09/10715-1, 10/17317-9)
BELI, D.; MENCIK, J. -M.; SILVA, P. B.; ARRUDA, J. R. F.. A projection-based model reduction strategy for the wave and vibration analysis of rotating periodic structures. COMPUTATIONAL MECHANICS, v. 62, n. 6, p. 1511-1528, . (10/17317-9, 13/23542-3, 14/19054-6)
SILVA, PRISCILLA B.; MENCIK, JEAN-MATHIEU; ARRUDA, JOSE R. F.. On the use of the wave finite element method for passive vibration control of periodic structures. ADVANCES IN AIRCRAFT AND SPACECRAFT SCIENCE, v. 3, n. 3, p. 299-315, . (13/23542-3, 10/17317-9)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SILVA, Priscilla Brandão. Análise dinâmica de estruturas periódicas utilizando uma abordagem de propagação de ondas e técnicas de sub-estruturação. 2015. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica Campinas, SP.

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