Análise do comportamento dinâmico de rotores embarcados em regimes não-lineares sob a influência de incertezas paramétricas

Detalhes bibliográficos
Ano de defesa: 2023
Autor(a) principal: Trevilato, Thales Renato Bertolazzo
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Uberlândia
Brasil
Programa de Pós-graduação em Engenharia Mecânica
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://repositorio.ufu.br/handle/123456789/41870
http://doi.org/10.14393/ufu.te.2023.36
Resumo: he understanding of rotordynamics, as well as the ability to model and predict the physical behavior of these systems, has escalated rapidly in recent decades. The new applications aim to optimize performance and reduce costs, without reducing safety and comfort, which has forced rotating systems to the extreme. Therefore, this Doctoral Thesis presents a numerical and experimental tests on the non-linear behavior of rotating systems subjected to base excitations and under the influence of parametric uncertainties. A model that considers nonlinearities due to large displacements is obtained from the Lagrange equations and the Finite Element method, in order to allow vibrations due to the motion of the rotor base. Subsequently, the deterministic model was expanded to include bearings with stochastic stiffness. Numerical analysis investigated a rotating machine composed of a flexible shaft containing a hard disk supported by two bearings. A test bench was built and used to validate the model, allowing the comparison of the implemented mathematical model with the experimental measurements, where the rotor vibration responses were obtained in the time and frequency domains. The results obtained demonstrate the representativeness of the proposed model.