Analysis of Torsional Dynamic Characteristics of Turbo-Generator Rotor Based on Cross Scale Modeling Method

Li, Yuan; Liang, Yi; Liu, Heng; He, Qiyuan; Chen, Changlin; Yu, Yupeng

doi:10.1007/s42417-021-00428-1

Cited by 2 publications

(3 citation statements)

References 20 publications

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“…The MFD can be obtained by multiplying the PPUA by the MMF. The permeance per unit area is determined by the air-gap length, as illustrated in Equation (1).…”

Section: Impact Of Drisc On Mfdmentioning

confidence: 99%

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Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators

He,

Jiang,

Sun

et al. 2023

Energies

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A dynamic rotor interturn short circuit fault may occur during synchronous generator operation. However, there is no method to analyze the generator’s characteristics under the dynamic rotor interturn short circuit fault and identify the fault. In order to solve this problem, a new dynamic rotor interturn short circuit fault analysis model is creatively proposed through mathematical derivation. Firstly, the rotor vibration characteristics and the mechanical response under magnetic pull excitation are theoretically analyzed. In addition, a finite element modeling method for the dynamic rotor interturn short circuit fault is proposed, and an experimental device is designed. The model of a synchronous generator under the dynamic rotor interturn short circuit fault is established to obtain the rotor’s unbalanced magnetic pulls and mechanical responses by finite element calculation. Finally, the rotor vibrations are tested on a CS-5 prototype generator. The validity of the model is verified by finite element calculation and an experiment. This paper provides theoretical support for the diagnosis of a synchronous generator’s dynamic rotor interturn short circuit fault.

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“…The MFD can be obtained by multiplying the PPUA by the MMF. The permeance per unit area is determined by the air-gap length, as illustrated in Equation (1).…”

Section: Impact Of Drisc On Mfdmentioning

confidence: 99%

“…As an energy-conversion device, the synchronous generator plays a vital role in the power system. The rotor of the synchronous generator is the core part of energy and power equipment [1]. The rotor vibration of the synchronous generator directly affects the operational reliability of the power system.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators

He,

Jiang,

Sun

et al. 2023

Energies

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show abstract

“…The coupling reduces the span of the rotor and transmits the torque of both rotors, which plays a key role in the engine. The main relevant studies on the torsional dynamics of rotor systems are: the turbo generator rotor system was accurately predicted by static and dynamic frequency drift simulation analysis [7]. In [8], the authors investigated the harmonic twisting torques dynamic analysis for the torsional vibration of shafts.…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of the nonlinear rotor system with Geislinger coupling

Wang¹,

Li²,

Li³

et al. 2023

Vib. proced.

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Rotor systems with coupling consist of two rotors, rolling bearings, sealing components, and nonlinear coupling. Currently, rotor systems with coupling are widely used in marine engines, aerospace engines, and various vehicle engines. In studies of rotor systems with coupling, the coupling connecting both sides of the rotor are often regarded as a linear stiffness unit. But in actual engineering, the torsional stiffness of the coupling varies with the speed of the system, and the variation of the coupling stiffness will affect the dynamic characteristics of the rotor. Based on the above phenomena, this study establishes the rotor model of driveshaft-Geislinger coupling-driveshaft in diesel engines and obtains the modal, frequency, and transient response analysis results of the rotor system with nonlinear Geislinger coupling. The modal, frequency, and transient response analysis results of the nonlinear model are compared with those of the linear model. This study can provide theoretical support for the vibration analysis of nonlinear rotor systems with connected Geislinger coupling.

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Analysis of Torsional Dynamic Characteristics of Turbo-Generator Rotor Based on Cross Scale Modeling Method

Cited by 2 publications

References 20 publications

Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators

Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators

Dynamics analysis of the nonlinear rotor system with Geislinger coupling

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