Projeto ótimo de um sistema automotivo utilizando materiais viscoelásticos
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Data
2017-03-10
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Universidade Federal de Goiás
Resumo
In order to attenuate unwanted vibrations, coming from mechanical systems, are increasing research in developing efficient products in the vibrant energy dissipation, being carried out in this line, full characterization of viscoelastic materials for the identification of its main phenomena and effectiveness check, reliability and security. The non-linear behavior of viscoelastic materials, when subjected to cyclic loading, is due to their microstructural characteristics, where it is possible that an effective vibration attenuation occurs. However, the complexity of the proposed problem suggests the implementation of numerical-computational procedures, the So that the deformation rates can be evaluated through harmonic analysis, so that the temperature variations can be defined and the phenomena associated with the material can be analyzed. With this, based on the dissipative characteristics of the material, the present work aims at the application of the same in the automotive area, being applied on the vehicular structure of utility vehicles aiming at the attenuation of the vibrations that arrive to the passenger compartment. To prove the efficacy of the material, the structural modeling of the viscoelastic was carried out in a computer environment (MatLab®) and then the material was inserted into the vehicle structure in the finite element software (Ansys®), where the structural and modal harmonic analysis , Thus verifying attenuations of the order of 8.746% for the second vibrating mode of the structure. However, due to the safety involved in automotive projects, it was necessary to analyze the computational effectiveness of these materials on the wide range of operational and environmental factors in which utility vehicles are submitted, thus guaranteeing the necessary reliability to the project.
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Palavras-chave
Materiais viscoelásticos, Atenuação de vibrações, Estrutura veicular, Viscoelastic materials, Vibration absorber, Vehicle structures
Citação
ANDRADE, G. O. Projeto ótimo de um sistema automotivo utilizando materiais viscoelásticos. 2017. 52 f. Dissertação (Mestrado em Modelagem e Otimização) - Universidade Federal de Goiás, Catalão, 2017.