Mathematical Modeling and the Computer Analysis of Strength Characteristics and Sensitivity of High-Loaded Parts of Power Turbines

Repetckii, Oleg; Ryzhikov, Igor; Nguyen, Tien Quyet

doi:10.1109/fareastcon.2018.8602578

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The stability of the system can be analysed through the free vibration equation, which can be derived from the equation of motion, given by [37]

(][, M) (}{, \ddot{q}) + (][, C) (}{, \dot{q}) + (][, K) (}{, q) = (}{, F)

where [ M ] is the system mass matrix, [ C ] is the system damping matrix, [ K ] is the system stiffness matrix, { q } is the system displacement vector, and { F } is the system external vector.…”

Section: Rotor Dynamics and Constrainsmentioning

confidence: 99%

Investigation of rotor strength and rotor dynamics for high‐speed high‐power switched reluctance machines

Gan

Chen

Cui

et al. 2020

IET Electric Power Applications

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This study proposes an investigation scheme of the rotor strength and rotor dynamic characteristics for high‐speed high‐power switched reluctance machines (SRMs). The analytical model and finite element analysis model are established to predict the maximum stress and deformation in the rotor. The Mises yield criterion is employed to verify the strength of the rotor at 1.2 times the rated speed. For the rotor dynamics, critical speed, unbalance response, and stability of the shaft system are analysed in detail. In the developed critical speed calculation scheme, the gyroscopic effect and the impact of the rotation speed on the stiffness and damping are considered. Then, the critical speeds acquired by the developed scheme are compared with those derived by using the conventional method. The unbalance response curves at different nodes are adopted for the unbalance response calculation, while the stability of the shaft system is verified by calculating the logarithmic decrement rates. The critical speed measurement experiment is performed on a 160 kW and 18,000 r/min SRM prototype, and the proposed critical speed calculation scheme is proved to be effective and accurate. The effectiveness of the unbalance response calculation method and the stability judgement technique are also verified by experiment.

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“…The stability of the system can be analysed through the free vibration equation, which can be derived from the equation of motion, given by [37]

(][, M) (}{, \ddot{q}) + (][, C) (}{, \dot{q}) + (][, K) (}{, q) = (}{, F)

Section: Rotor Dynamics and Constrainsmentioning

confidence: 99%

Investigation of rotor strength and rotor dynamics for high‐speed high‐power switched reluctance machines

Gan

Chen

Cui

et al. 2020

IET Electric Power Applications

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“…Methods based on frequency analysis of free vibrations have shown their effectiveness, but they have a number of limitations, for example, the influence of the thickness of the contact layer between the ring and the transducer on the measurement results, as well as the difficulty of interpreting the results obtained in the presence of a slight taper or ovality of the measured ring [4]. In this regard, the use of the strain gauge method for monitoring press connections with mechanical loading under small influences, including thermal ones, can increase the accuracy of determining the tension and reduce the influence of interfering factors.…”

Section: Introductionmentioning

confidence: 99%

Study of press joints using strain gauges at low loads

Popkov,

Shlyakhtenkov,

Vyplaven

2024

E3S Web Conf.

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The destruction of the bearing ring of the axle box unit inevitably leads to the uncoupling of the car, which causes temporary and material losses. The problem of determining the bearing ring tension without removal is relevant; its solution will improve efficiency and reduce the inspection time. Experimental studies were carried out to determine the forces inside the contact pair, as well as their relationship with the amount of interference. It has been established that with small impacts on the ring, surface deformations in the area of impact are uneven and form a gradient in which large deformations are observed at the edge of the ring, smaller ones in the middle. It has been proven that the transition boundary of the magnitude of deformations depends on the magnitude of the interference in the contact pair. A method for determining the tension by strain gauging is proposed.

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Dynamics of Turbomachine Impellers Using Sensitivity Functions

Repetckii

Nguyen

2021

Lecture Notes in Mechanical Engineering

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Mathematical Modeling and the Computer Analysis of Strength Characteristics and Sensitivity of High-Loaded Parts of Power Turbines

Cited by 4 publications

References 7 publications

Investigation of rotor strength and rotor dynamics for high‐speed high‐power switched reluctance machines

Investigation of rotor strength and rotor dynamics for high‐speed high‐power switched reluctance machines

Study of press joints using strain gauges at low loads

Dynamics of Turbomachine Impellers Using Sensitivity Functions

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