Dynamic analysis of a high speed rotor-bearing system

Jalali, Mohammad Hadi; Ghayour, Mostafa; Ziaei-Rad, Saeed; Shahriari, Behrooz

doi:10.1016/j.measurement.2014.03.010

Cited by 58 publications

(26 citation statements)

References 17 publications

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“…The predicted lateral natural frequencies showed an error up to 6.5% compared with the measured natural frequencies. Jalali et al [28] determined the natural frequencies of a rotor using a 1D-beam model. The natural frequencies showed errors up to 22% in relation with 3D FEM and up to 13% with experimental results.…”

Section: Discussionmentioning

confidence: 99%

Dynamic model for high-speed rotors based on their experimental characterization

Montoya¹,

Rodriguez²,

Mejía³

2017

Appl. Theory Comput. Technol.

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Abstract:Rotating systems components such as rotors, have dynamic characteristics that are of great importance to understand because they may cause failure of turbomachinery. Therefore, it is required to study a dynamic model to predict some vibration characteristics, in this case, the natural frequencies and mode shapes (both of free vibration) of a centrifugal compressor shaft. The peculiarity of the dynamic model proposed is that using frequency and displacements values obtained experimentally, it is possible to calculate the mass and stiffness distribution of the shaft, and then use these values to estimate the theoretical modal parameters. The natural frequencies and mode shapes of the shaft were obtained with experimental modal analysis by using the impact test. The results predicted by the model are in good agreement with the experimental test. The model is also flexible with other geometries and has a great time and computing performance, which can be evaluated with respect to other commercial software in the future.

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Section: Discussionmentioning

confidence: 99%

Dynamic model for high-speed rotors based on their experimental characterization

Montoya¹,

Rodriguez²,

Mejía³

2017

Appl. Theory Comput. Technol.

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“…Переходной патрубок, конденсаторы и связи между элементами системы турбина-фундаментоснование моделировались с помощью дополнительных масс и граничных условий [11][12][13][14]. За счет особенностей такого способа моделирования система связей турбины с фундаментом аппроксимирует три состоянияжесткая связь, свободное опирание и упругое взаимодействие [15][16][17][18][19][20]. Для расчетов колебаний была использована конечно-элементная модель из 27 040 узлов и 23 165 конечных элементов [21].…”

Section: описание расчетной моделиunclassified

Investigation of oscillations of the case of steam turbine with a capacity of 500 MW

Красников¹

2019

Bulletin of KhNAHU

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ИССЛЕДОВАНИЕ КОЛЕБАНИЙ КОРПУСА ПАРОВОЙ ТУРБИНЫ МОЩНОСТЬЮ 500 МВт Красников С. В. Харьковский национальный автомобильно-дорожный университет Аннотация. Проведено моделирование энергоблока с паротурбинной установкой мощностью 500 МВт. Построены геометрические и расчетные модели. Проведено расчеты вынужденных колебаний всей системы. По результатам расчетов определены причины повышенных вибраций. Расчеты и моделирование выполнено методом конечных элементов.

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“…A high speed rotor-bearing system [6] is considered. Due to the external random factors and the internal random vibration, then regarding all stochastic excitations as Guass white noise.…”

Section: System Modelmentioning

confidence: 99%

Stochastic Stability and Bifurcation of A High Speed Rotor-Bearing System with Random Excitation

Zhang

et al. 2017

MATEC Web Conf.

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Abstract. In this paper, a high speed rotor-bearing system with stochastic excitation is considered, and study the stability and Hopf bifurcation of the system by using quasi-nonintegrable Hamiltonian system theory. Then, the conditions of local and global stability of system are obtained by largest Lyapunov exponent and boundary category. Finally, the solution of FPK equation can be got, which is stationary probability density function and jointly stationary probability density function, and then, by simulating its graph to illustrate the results.

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Dynamic analysis of a high speed rotor-bearing system

Cited by 58 publications

References 17 publications

Dynamic model for high-speed rotors based on their experimental characterization

Dynamic model for high-speed rotors based on their experimental characterization

Investigation of oscillations of the case of steam turbine with a capacity of 500 MW

Stochastic Stability and Bifurcation of A High Speed Rotor-Bearing System with Random Excitation

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