Dynamic optimization analysis of a stored energy motor with serious unbalanced mass distribution
The rotor-bearing system of a stored energy motor, which is composed of exciter, main generator and asynchronous motor, has typical characteristics of serious unbalanced mass distribution. According to the rotor and bearing system of the stored energy motor, dynamic performance optimization analyses are carried out by means of the finite element analysis method, to give the system optimization method and to establish the system optimization plan.
3 D Finite Element Modeling and Vibration Analysis of Gas Turbine Structural Elements
This paper is dedicated to the topical problem of vibration reliability of gas turbine units. One of the most urgent problems during design and manufacturing of gas turbine units is the provision of reliability and durability of unit's joints by development and application of perspective turbomachines constructions with application of up-to-date CAD/CAE/CAM-technologies. This paper is devoted to finite element analysis of rotors and casings vibration analysis for various gas turbine units. In the present paper natural frequencies of the gas turbine unit rotor with varying bearings stiffness are analyzed for axisymmetrical model. Transient process of rotor vibrations after 4-th cascade blade breakaway is also analyzed. Finite element modeling and analysis of natural frequencies of full-scale gas turbine turbocompressors models and power turbine spatial model is carried out.
Theoretical and Experimental Investigation of Gas-Lubricated, Pivoted-Pad Journal Bearings
This paper presents some of the theoretical predictions and experimental results for the steady-state characteristics of a gas-lubricated, pivoted-pad journal bearing of finite length. An analytical expression for the prediction of load-carrying capacity for these bearings is developed from numerical computer solutions. Sample calculations are presented to show how the theoretical data may be utilized in the design of an actual pivoted-pad bearing. Improvements over previous approximate theories are discussed. Contributed by the ASLE Technical Committee on Bearings and Bearing Lubrication and presented at the Annual Meeting of the American Society of Lubrication Engineers held in New York, April, 1963.