Análise dinâmica em vigas compostas com amortecimento utilizando o método dos elementos espectrais e elementos finitos

• Ano de defesa: 2015
• Autor(a) principal: Silva, Lucas de Haro [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Materiais; Polímeros; Vibração; Mecanica não-linear; Materials
• Link de acesso: http://hdl.handle.net/11449/132703; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-12-2015/000852117.pdf

New viscoelastic materials have recently been developed to help improve noise levels and vibrations in mechanical structures for applications in all kinds of industries such as aeronautics, space, naval, civil, railway and automobile. Treatment of the viscoelastic layer applied to solid metallic structures change two properties that are related to the mass distribution and the damping mechanism. The other dynamic property controlling system is a mechanical stiffiness which changes with the application of viscoelastic material. The system for this kind is usually complex because the viscoelastic material may have nonlinear behavior, in contrast to the various tools available for linear dynamics. In this work, the dynamic behavior of the composite beams are modeled by methods of spectral elements and the finite elements using different types of elements that are then compared with experimental results developed in the laboratory for various beams with different viscoelastic material layer. After obtaining the data generated in the laboratory models of spectral elements and finite elements are updated to help understand the effects on damping for various natural frequencies and the trade-off between the attenuation and the added mass structure