Contribuição ao controle passivo de rotores flexíveis suportados por mancais de filme fluido através de elastômeros

• Ano de defesa: 2013
• Autor(a) principal: Thomazi, Cleber Caetano
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Mecânica; Engenharias; UFU
• Palavras-chave em Português: Rotores flexíveis; Mancais de filme fluido; Elastômeros; Flexible rotors; Fluid film bearings; Elastomers; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14735

Dynamic analyses of a flexible rotor supported by fluid film radial bearings on elastomeric suspension are performed using the Finite Element Method. The response to the unbalance and the stability behavior are obtained for different types of damping devices configuration and viscoelastic materials. The stiffness and damping coefficients of the hydrodynamic bearings are evaluated through the Short Bearing Theory. The properties of the elastomers, as a function of the frequency at a given temperature, are obtained from tests conducted in the Laboratory of Mechanical Systems of the School of Mechanical Engineering in the Federal University of Uberlândia. Dissipative elastomeric devices have strong influence on the dynamic behavior of the rotor. It is observed that with the suitable choice of the damper, the amplitude of the unbalance response may be reduced. The threshold speed of stability is increased with the use of elastomeric dampers for the most analyzed cases.