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IEC 60034-14, “Rotating Electrical Machines—Part 14: Mechanical Vibration of Certain Machines with Shaft Heights 56 mm and Higher—Measurement, Evaluation and Limits of Vibration Severity,” International Electro technical Commission, 2007.
has been cited by the following article:
TITLE: Mathematical Rotordynamic Model Regarding Excitation Due to Elliptical Shaft Journals in Electrical Motors Considering the Gyroscopic Effect
AUTHORS: Ulrich Werner
KEYWORDS: Rotordynamics; Elliptical Shaft Journals; Orbit; Vibrations
JOURNAL NAME: Applied Mathematics, Vol.4 No.8A, July 25, 2013
ABSTRACT: The paper presents a mathematical rotordynamic model regarding excitation due to elliptical shaft journals in sleeve bearings of electrical motors also considering the gyroscopic effect. For this kind of excitation, a mathematical rotordynamic model was developed considering the influence of the oil film stiffness and damping of the sleeve bearings, the stiffness of the end-shields and bearing housings, the stiffness of the rotor, the electromagnetic stiffness in the air gap of the electrical motor and the mass moment of inertia of the rotor and therefore also considering the gyroscopic effect. The solution of the linear differential equation system leads to the mathematical description of the absolute orbits of the shaft centre, the shaft journals and the bearing housings and to the relative orbits between the shaft journals and the bearing housings. Additionally, the bearing housing velocities can also be derived with this mathematical rotordynamic model.
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