Integração de sistemas rotor-mancais hidrodinâmicos-estrutura de suporte para resolução numérica / Integration of rotor-hydrodynamic bearings-support structure systems for numerical resolution

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The Rotordynamics occupies a prominent position in the design of machines and structures, due to the wide application of rotating machinery and the importance of the knowledgment of its operation for purposes of optimization and design for cost reduction, quality improvement and increased component life cycle. These machines and their components have peculiar characteristics in its operation, which will reflect in its dynamic behavior and, consequently, on the mechanical problems associated with these. The behavior of rotating machinery involves considerable complexity, as they are composed, usually by a system of equipment which includes, besides the rotor, shafts and bearings, foundation and other auxiliary equipment, for example, shaft seals. Therefore, to study the dynamic of these systems, it is necessary to determine the interaction of all components for understanding the phenomena involved. The rotation system was mathematically modeled by the shaft modeling through the Finite Element Method, through a set of disks and shaft segments with elasticity and mass distribution, and hydrodynamic bearings, whose representation occurs through the coefficients of equivalent stiffness and damping. The foundation also had its influence covered by the formulation of Concentrated Parameters, Mechanical Impedance and Mixed Coordinates. Therefore, in this work, it is developed the computational package configuration, standardization of input and output files, the implementation of beam elements and disks, the unbalance excitation, the determination of loads on the bearings and the frequency dynamic response of the system, aiming at robustness, flexibility, reliability, usability and user-friendly of the software

ASSUNTO(S)

rotores - dinâmica máquinas método dos elementos finitos rotordynamics machines finite element method

ACESSO AO ARTIGO

Documentos Relacionados