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Journal articles on the topic 'Dynamic characteristics of the rotor'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Fan, Ye Sen, San Min Wang, and Zhen Yang. "Dynamic Characteristics of the Coupled System of the High Pressure Rotor and the Radial Driveshaft of a Turbofan Engine." Advanced Materials Research 44-46 (June 2008): 127–34. http://dx.doi.org/10.4028/www.scientific.net/amr.44-46.127.

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In a turbofan engine, the high pressure rotor and the radial driveshaft, which transmit the power from the internal gear-box to the external gear-box, are geared by a spiral bevel gear pair. In this paper, a reasonably simplified dynamic model of the coupled rotors system is established, and then, the coupled stiffness matrix and coupled damping matrix of the spiral bevel gear pair are deduced. A shaft element method is proposed to investigate the lateral-torsional coupled vibration equations of the gear-rotor system. Furthermore, the mode shapes and unbalance responses of this two rotors coup

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2

Xiang, Ling, Zi Rui Wang, and Gui Ji Tang. "Bifurcation Characteristics of Unbalanced Rotor - Bearing System." Advanced Materials Research 490-495 (March 2012): 2037–41. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2037.

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Dynamic model of nonlinear rotor—bearing system is set up using the modified Capone bearing forces models. And the nonlinear dynamics behavior of unbalanced rotor—bearing systems was studied. The system state trajectories, Poincare maps, are also constructed to analyze the typical dynamic behavior of the system．Through the nonlinear dynamic numerical simulation of the system，the dynamic phenomena of the rotor—bearing system caused by oil film forces are clearly distinct. The computational results show that the rotor speed is one of the most important factors of the system dynamic behavior. It

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3

Huang, Jingjing, Lu Cui, Suobin Li, Bingbing Han, and Longxi Zheng. "Parametric Modeling and Dynamic Characteristics Analysis of a Power Turbine Rotor System." International Journal of Turbo & Jet-Engines 36, no. 4 (2019): 359–65. http://dx.doi.org/10.1515/tjj-2018-0042.

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Abstract With the increasing requirements of aeroengine performance and working stability, the primary research task of the rotor system dynamics is to build a rotor system model that can reflect the actual situation and obtain the calculation results which can reflect the real dynamic characteristics of the rotor system. In this paper, the finite element analysis model of a power turbine rotor was established, and the dynamic model and dynamic characteristics of the complex rotor system were studied. The results indicated that the finite element model could reflect the real dynamic characteri

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4

Zheng, Nan, Mo-li Chen, Gui-Huo Luo, and Zhi-Feng Ye. "Dynamic Behavior Analysis of Intermediate Bearing-Squeeze Film Dampers-Rotor System under Constant Maneuvering Overload." Shock and Vibration 2021 (April 30, 2021): 1–24. http://dx.doi.org/10.1155/2021/5512409.

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Under the flight maneuvering of an aircraft, the maneuvering load on the rotor is generated, which may induce the change of dynamic behavior of aeroengine rotor system. To study the influence on the rotor dynamic behavior of constant maneuvering overload, a nonlinear dynamic model of bearing-rotor system under arbitrary maneuver flight conditions is presented by finite element method. The numerical integral method is used to investigate the dynamic characteristics of the rotor model under constant maneuvering overload, and the simulation results are verified by experimental works. Based on thi

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5

Petro, Kachanov, Lytviak Oleksandr, Derevyanko Oleksandr, and Komar Sergii. "DEVELOPMENT OF AN AUTOMATED HYDRAULIC BRAKE CONTROL SYSTEM FOR TESTING AIRCRAFT TURBOSHAFT GAS TURBINE ENGINES." Eastern-European Journal of Enterprise Technologies 6, no. 2 (102) (2019): 52–57. https://doi.org/10.15587/1729-4061.2019.185539.

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To absorb the power generated by a free turbine, hydraulic brake systems of various designs are used in ground tests of aircraft turboshaft gas turbine engines. Ground tests of aircraft turboshaft gas turbine engines with the use of such hydraulic brakes can result in emergency modes of automated engine control in the area of operation of a free turbine speed regulator. Mismatch between the hydraulic brake loading characteristics and the loading characteristics of the rotor driven by a free turbine of the engine is the main cause of emergency operation of automated control systems. The present

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6

Wang, Longkai, Yijun Yin, Ailun Wang, Xing Heng, and Miao Jin. "Dynamic Modeling and Vibration Characteristics for a High-Speed Aero-Engine Rotor with Blade Off." Applied Sciences 11, no. 20 (2021): 9674. http://dx.doi.org/10.3390/app11209674.

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Blade off that occurs during operation will generate a sudden imbalance excitation and make the rotor become inertially asymmetric, which leads to large instantaneous impact load and induces more complex rotor dynamic phenomena. In order to study the transient dynamic characteristics for complex rotors suffering from blade off, a mathematical model for solving the response of the gas generator rotor in the aero-turboshaft engine is established based on the FE method and DOF condensation, in which the complex structural characteristics, transient impact load, and inertia asymmetry of the rotor

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7

Li, M. "Non-linear dynamic behaviour of rotor—bearing system trained by bevel gears." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 4 (2008): 617–27. http://dx.doi.org/10.1243/09544062jmes843.

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The vibrations of parallel geared rotor—bearing system have been intensively discussed; however, little attention has been paid to the dynamic analysis of angled bevel-geared system supported on journals. In the present work, the non-linear dynamics of a bevel-geared rotor system on oil film bearings is studied. First, the dynamic model is developed under some assumptions, such as rigid rotors, short-bearings, small teeth errors, and so forth. Then, the non-linear dynamic behaviours of both the balanced and unbalanced rotor system are analysed, respectively, in which the equilibrium points, li

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8

Wang, Yu, Mao Sun, and Chao Yan. "Numerical simulation of hovering flow field and interference characteristics of rotor system." Journal of Physics: Conference Series 2235, no. 1 (2022): 012002. http://dx.doi.org/10.1088/1742-6596/2235/1/012002.

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Abstract In order to investigate the aerodynamic interference characteristics of tandem rotor, this paper simulates the hovering flow field of single rotor and tandem rotor based on the dynamic structure overset grid method and unsteady Navier-Stokes equations in computational fluid dynamics (CFD). In the study of hover state of single rotor with twist, the trajectory of the blade vortex and the change pattern are briefly analyzed. Subsequently, the flow field disturbance of tandem rotor, the vortex structure, the pull coefficient and the downwash flow are investigated. The results show that t

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9

El-Shafei, A., and R. V. Eranki. "Dynamic Analysis of Squeeze Film Damper Supported Rotors Using Equivalent Linearization." Journal of Engineering for Gas Turbines and Power 116, no. 3 (1994): 682–91. http://dx.doi.org/10.1115/1.2906874.

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The technique of equivalent linearization is presented in this paper as a powerful technique to perform nonlinear dynamic analysis of squeeze film damper (SFD) supported rotors using linear rotor-dynamic methods. Historically, it is customary to design SFDs for rotor-dynamic analysis by assuming circular-centered orbits, which is convenient in making the nonlinear damper coefficients time independent and thus can be used in an iterative approach to determine the rotor-dynamic characteristics. However, the general synchronous orbit is elliptic in nature due to possible asymmetry in the rotor su

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10

Shevchenko, S. S. "Mathematical modeling of centrifugal machines rotors seals for the purpose of assessing their influence on dynamic characteristics." Mathematical Modeling and Computing 8, no. 3 (2021): 422–31. http://dx.doi.org/10.23939/mmc2021.03.422.

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With an increase of equipment parameters, such as the pressure of the sealing medium and the speed of shaft rotation, the problems ensuring its hermetization efficiency are rising up. In addition to hermetization itself, the sealing system affect the overall operational safety of the equipment, especially vibratory. Groove seals are considered as hydrostatodynamic supports capable of effectively damping rotor oscillations. To determine the dynamic characteristics, models of grooved seals and single-disc rotors with grooved seals are examined. The obtained analytical dependences for computation

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11

Nie, Weijian, Xiaoguang Yang, Guang Tang, Qicheng Zhang, and Ge Wang. "Effect of Oil Film Radial Clearances on Dynamic Characteristics of Variable Speed Rotor with Non-Concentric SFD." Machines 12, no. 12 (2024): 882. https://doi.org/10.3390/machines12120882.

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Variable-speed aircraft engines require the power turbine rotor to operate stably within a wide range of output speeds, posing a challenge for rotor vibration reduction design. Non-concentric squeeze film dampers (NCSFDs) have been widely used in rotor vibration reduction design due to their simple structure. However, comprehensive research on the matching and applicability of NCSFDs under varying operating speeds is lacking. Therefore, this paper investigates the influence of oil film radial clearances on the dynamic characteristics of a variable-speed rotor system with an NCSFD, examining it

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12

Wei, Yufen, Guoyou Han, Lingyi Yang, and Haiying Zu. "Research on Dynamic Characteristics of Rub-Impact of Progressive Cavity Pump with Rotation Speed." Advances in Engineering Technology Research 1, no. 2 (2022): 148. http://dx.doi.org/10.56028/aetr.1.2.148.

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The dynamic characteristics of Progressive Cavity Pump (PCP) have an important influence on the stability of oil wells string system. A nonlinear dynamics model of rotor system was presented. The equations of unbalance rotor were established by the Lagrange approach and the vibration characteristics of the rotor system under rub-impact was analyzed by used the modern nonlinear dynamics and bifurcation theories, through numerical calculation. The bifurcation diagrams, time domain charts and Poincaré maps were obtained to analyze dynamic characteristics of the system and the results reveal the m

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13

Wei, Yufen, Guoyou Han, Lingyi Yang, and Haiying Zu. "Research on Dynamic Characteristics of Rub-Impact of Progressive Cavity Pump with Rotation Speed." Advances in Engineering Technology Research 2, no. 1 (2022): 148. http://dx.doi.org/10.56028/aetr.2.1.148.

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The dynamic characteristics of Progressive Cavity Pump (PCP) have an important influence on the stability of oil wells string system. A nonlinear dynamics model of rotor system was presented. The equations of unbalance rotor were established by the Lagrange approach and the vibration characteristics of the rotor system under rub-impact was analyzed by used the modern nonlinear dynamics and bifurcation theories, through numerical calculation. The bifurcation diagrams, time domain charts and Poincaré maps were obtained to analyze dynamic characteristics of the system and the results reveal the m

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14

Wang, Nanfei, Dongxiang Jiang, and Hongzhi Xu. "Dynamic characteristics analysis of a dual-rotor system with inter-shaft bearing." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 3 (2017): 1147–58. http://dx.doi.org/10.1177/0954410017748969.

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The dual-rotor structure is susceptible to vibration, causing the malfunction of the entire operating system. In order to avoid the resonance during operation, it is significant and necessary to conduct modal analysis of such rotors. The dynamic analysis of the full dual-rotor system under operating conditions is also necessary to study dynamic characteristics of the rotating system. In this paper, one-dimension Timoshenko beam-type model, including the effects of gyroscopic moments, rotary inertias, bending and shear deformations, and three-dimension model for dual-rotor system with inter-sha

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15

Zhu, Rui, Guang-chao Wang, Qing-peng Han, An-lei Zhao, Jian-xing Ren, and Xin Xia. "Dynamic Characteristics and Experimental Research of a Two-Span Rotor-Bearing System with Rub-Impact Fault." Shock and Vibration 2019 (September 15, 2019): 1–15. http://dx.doi.org/10.1155/2019/6309809.

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Rotor rub-impact has a great influence on the stability and safety of a rotating machine. This study develops a dynamic model of a two-span rotor-bearing system with rubbing faults, and numerical simulation is carried out. Moreover, frictional screws are used to simulate a rubbing state by establishing a set of experimental devices that can simulate rotor-stator friction in the rotor system. Through the experimental platform and its analysis system, the rubbing experiment was conducted, and the vibration of the rotor-bearing system before and after the critical speed is observed. Rotors runnin

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16

Li, Yan, Desheng Zhang, and Fuhai Duan. "Dynamic characteristics of opposed-conical gas-dynamic bearings." Industrial Lubrication and Tribology 72, no. 3 (2019): 415–25. http://dx.doi.org/10.1108/ilt-07-2019-0264.

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Purpose The purpose of this paper is to investigate dynamic characteristics of opposed-conical gas-dynamic bearings considering five degree-of-freedom motion, including translation and tilt. Design/methodology/approach The steady-state Reynolds equation and perturbed Reynolds equations are solved on the surface of conical bearings, and both stiffness and damping coefficients are calculated. A formula for quickly calculating critical mass is deduced to discriminate the stability of the rotor considering the five degree-of-freedom motion. Findings Results show that the stability of the rotor is

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17

Zhang, Kai, Xinkuo Jiang, Shiyang Li, et al. "Transient CFD Simulation on Dynamic Characteristics of Annular Seal under Large Eccentricities and Disturbances." Energies 13, no. 16 (2020): 4056. http://dx.doi.org/10.3390/en13164056.

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Annular seals of turbomachinery usually suffer from various degrees of eccentricities and disturbances due to the rotor–stator misalignment and radial loads, while the discussion of annular seal under both large static eccentricities and dynamic disturbances is relatively limited. In this paper, the applicability of linear assumption and reliability of nonlinear dynamic model for eccentric annular seals under large eccentricities and disturbances is discussed based on the investigation of seals with various rotor motions through computational fluid dynamics (CFD). After the validation of trans

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18

Idris, Muhammad, Zakie Anugia, and Donny Mustika. "DEVELOPMENT OF FINITE ELEMENT ANALYSIS PROGRAM FOR ROTORDYNAMIC PREDICTION OF SINGLE AND MULTI DISK ROTOR MODEL." Indonesian Journal of Engineering and Science 3, no. 3 (2022): 001–13. http://dx.doi.org/10.51630/ijes.v3i3.61.

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The rotating equipment is a crucial part of system performance reliability. Vibration, as a characteristic of an oscillating body, is a fundamental parameter to determine the dynamic behaviour of the rotor system. The dynamic characteristics include natural frequency, critical speed, mode shape, and vibration response. This paper discussed the application of rotordynamics analysis as a tool to numerically predict the dynamic behaviour of a rotor system. The aim is to determine a rotor system's natural frequency and critical speed by a finite element analysis (FEA) program. The selected method

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19

Zhang, Ao, and Hongyuan Sun. "Dynamics Analysis of a Rolling Rotor Compressor Considering the Electromagnetic Force." Journal of Computing and Electronic Information Management 10, no. 3 (2023): 91–94. http://dx.doi.org/10.54097/jceim.v10i3.8708.

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Rolling rotor compressor is a commonly used compressor in air conditioning systems, and studying its internal dynamic characteristics plays an important role in the vibration and noise of air conditioning systems. Due to the integration of the motor rotor and shaft inside the compressor, the influence of electromagnetic force needs to be considered when analyzing the dynamics of the compressor. This paper studies the rotor dynamics characteristics of a rolling rotor compressor, considering not only the bearing force and gas force inside the cylinder, but also the electromagnetic force of the m

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20

Hajžman, Michal, Miroslav Balda, Petr Polcar, and Pavel Polach. "Turbine Rotor Dynamics Models Considering Foundation and Stator Effects." Machines 10, no. 2 (2022): 77. http://dx.doi.org/10.3390/machines10020077.

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The paper deals with the modelling of turbine rotors, including a foundation and stator parts, and with their dynamic analysis. The dynamics of turbines can be strongly influenced by the effects of a rotor foundation, and therefore suitable modelling approaches should be developed to obtain proper analysis tools. The standard methods for the modelling of rotating shafts are summarized in the paper, and two approaches to including foundation effects into dynamic models are introduced. The approach based on the dynamic compliance of the foundation with respect to the rotor angular velocity is co

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21

LIU, Xin, Zhiwei XUE, Yuting ZHANG, and Leilei NIU. "Dynamic characteristics of compound rotor system of mechanically rectified permanent magnet generator." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 42, no. 3 (2024): 550–57. http://dx.doi.org/10.1051/jnwpu/20244230550.

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The compound rotor system of a mechanically rectified permanent magnet generator is the key structure to realize the rectification function. The dynamics of the compound rotor system under bidirectional input conditions are studied to analyze the vibration deformation degree of each component of the rotor system and to ensure the uniform distribution of the shunt load of each planetary gear. In this paper, based on the theory of concentrated mass parameters, a dynamic model of the compound rotor system under the condition of bidirectional input is established. The model is solved with the Rung

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22

Yang, Kang, and Yi Yang. "Simulation of Crack Dynamic Characteristics of Rotor Based on FEM Analysis." Advanced Materials Research 139-141 (October 2010): 2677–80. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.2677.

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A new simulation method is proposed for dynamic characteristics of cracked rotor based on the finite element analysis, in which the stiffness model has been derived for the exact description of variation rules of cracked shafts. A non-linear dynamic equation is constituted according to stiffness characteristic of cracked-rotor change in time domain. Then the corresponding dynamic equation of the cracked rotor based on FEM analysis is modeled and the numerical simulation is carried out with solutions of high accuracy. At last, the dynamic characteristics of cracked rotor in diverse conditions a

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23

Muszynska, A. "Improvements in Lightly Loaded Rotor/Bearing and Rotor/Seal Models." Journal of Vibration and Acoustics 110, no. 2 (1988): 129–36. http://dx.doi.org/10.1115/1.3269489.

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A model for lightly loaded steadily rotating shaft/bearing/seal systems is proposed in this paper. The model is based on modal characteristics for the rotor, and rotational characteristics for the fluid dynamic forces generated in bearings and/or seals. The fluid average circumferential velocity ratio as a nonlinear function of shaft eccentricity represents a key factor in the model. The model is extremely useful for rotor stability analysis. The model adequacy was proved for one and two lateral mode models of rotors.

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24

Gu, Xiancheng, Linghua Dong, Tong Li, and Weidong Yang. "A Study on Influence of Flapping Dynamic Characteristics on Vibration Control of Active Rotor with Trailing-Edge Flaps." Aerospace 10, no. 9 (2023): 776. http://dx.doi.org/10.3390/aerospace10090776.

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An active rotor with trailing-edge flaps (TEFs) is an effective active vibration control method for helicopters. Blade flapping dynamic characteristics have a significant effect on the active vibration control performance of an active rotor. In this study, an aeroelastic model is developed using the Hamilton principle, and a quasi-steady Theodorsen model for the airfoil with a TEF is utilized to calculate the aerodynamic loads induced by the dynamic deflection of TEFs. The accuracy of this model is validated through a comparison with the CAMRAD calculation and flight test results of a SA349/2

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25

Lee, A.-C., and Y.-P. Shih. "Identification of the Unbalance Distribution and Dynamic Characteristics of Bearings in Flexible Rotors." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 210, no. 5 (1996): 409–32. http://dx.doi.org/10.1243/pime_proc_1996_210_216_02.

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This paper presents a new method for estimating dynamic characteristics of bearings and unbalance distribution in flexible rotors based on the transfer matrix method for analysing the steady state responses of rotor-bearing systems, in which rotary inertia, gyroscopic and transverse-shear effects are also considered. Identification can be realized from the measured response data influenced by bearing characteristics and rotor unbalance using the least-squares method. Justification of the method is presented by numerical simulations.

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26

Fang, Pan, and Yongjun Hou. "Synchronization characteristics of a rotor-pendula system in multiple coupling resonant systems." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 10 (2017): 1802–22. http://dx.doi.org/10.1177/0954406217711468.

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The problem is motivated by observations of a rotor-pendula system, which derived from a new shale shaker. To grasp the dynamic characteristics of the shale shaker, the key research is exploring the synchronous mechanism for the system, since synchronous state between rotors is closely related to the dynamic characteristics of the system. In this paper, the dynamic equation of the rotor-pendula system is firstly derived by applying Lagrange’s equations. Through Laplace’s transformation method, the approximate responses of the system in synchronous state are obtained, which is determined coupli

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27

Han, Yongchao, and Ming Li. "Nonlinear Dynamic Characteristics of Marine Rotor-Bearing System under Heaving Motion." Shock and Vibration 2019 (January 14, 2019): 1–16. http://dx.doi.org/10.1155/2019/7683952.

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In this paper, the influence of the heaving motion on the nonlinear dynamic behavior of the rotor-bearing system is considered. First, a mathematic model of the marine rotor-bearing system is developed on the short bearing theory in the noninertial reference system, in which the heaving motion is taken into account. Then its dynamic characteristics are analyzed based on the numerical integration method, such as the bifurcation diagram, the largest Lyapunov exponents (LLE), the steady-state response, and the rotor orbit and its Poincaré map. The results indicate that heaving motion has a great

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28

Sineglazov, Victor, and Oleksandr Stanislavchuk. "Automation Disign of Hybrid Vertical-axial Rotors." Electronics and Control Systems 4, no. 70 (2022): 44–50. http://dx.doi.org/10.18372/1990-5548.70.16755.

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The paper proves the need to create vertical-axial rotors of wind power plants in the city strip, which can be placed on roofs, which makes it possible to increase their energy efficiency by 60-70%. It is shown that the placement of such rotors on the roofs has its own characteristics, which is the need to take into account the relief of the roof of the house, its surface area, rose and wind speed over it and others. Examples of wind farms are considered and it is proved that their energy efficiency can be increased by using hybrid vertical-axial rotors, which consist of a combination of Darri

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29

Li, Guang Xi, Yin Shan Zhang, Lin He, and Li Yang. "Rotor Dynamics Analysis of the Flywheel Energy Storage System." Applied Mechanics and Materials 312 (February 2013): 3–10. http://dx.doi.org/10.4028/www.scientific.net/amm.312.3.

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In this paper, a dynamics model of flywheel rotor - support system is build. Obtained the dynamic characteristics of the flywheel rotor by finite element method .The results indicate that the rotor system is stability and security. This provides the basis for the subsequent optimization of flywheel rotor.

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30

Xiong, Libo, Chunrong Hua, Funing Yang, Dawei Dong, and Huajiang Ouyang. "Dynamic Characteristics Analysis of a Coupled Multi-crack Rotor System." Journal of Physics: Conference Series 2184, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2184/1/012040.

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Abstract This paper establishes a coupled model for multi-crack rotor using Timoshenko beam element with six degrees of freedom, and derives the stiffness matrix in the equations of motion accounting for the coupling between multiple cracks (the interaction between cracks). Then the effects of crack orientation angles (the relative angle between cracks, γ) on dynamic characteristics of the coupled multi- crack rotor near 1/3 and 1/2 subcritical speeds are analysed. The coupling between cracks induces more complex nonlinear dynamic characteristics such as large magnitudes of the super-harmonic

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31

Zhang, Wei Wei. "Coupled Dynamic Analysis of Magnetic Bearing-Rotor System under the Influences of Base Motion." Applied Mechanics and Materials 109 (October 2011): 199–203. http://dx.doi.org/10.4028/www.scientific.net/amm.109.199.

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To investigate the active magnetic bearing-rotor system which is influenced by the base motion, coupled dynamic model is developed in this paper. The effects of base motion, electrical differential equations of control system and the mounting of sensors at different positions on the dynamic characteristics of the magnetic bearing-rotor system were discussed. The feasibility of the dynamic model is illustrated. This dynamic model can be used for the coupled electromechanical dynamics analysis of rotor system equipped with magnetic bearings.

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Shyu, Shiuh Hwa, and Yu Wei Chen. "Dynamic Characteristics of Rotor-Bearing System with a Labyrinth Seal." Key Engineering Materials 739 (June 2017): 169–81. http://dx.doi.org/10.4028/www.scientific.net/kem.739.169.

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In this paper, the dynamic characteristics of rotor-bearing system with a labyrinth seal are investigated. The dynamic coefficients of labyrinth seal and the whirl speeds of rotor-bearing system are analyzed. The simplified rotor-bearing model consists of a rigid disk and a flexible shaft. The rotor-bearing system supported by two ball bearings, which are modeled as the spring-damper systems. A labyrinth seal supports one of the rigid disks. The perturbation approach has been applied to the governing equations of the bulk-flow model to calculate the dynamic coefficients of labyrinth seal. The

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33

Guo, Yixiang, Lifang Chen, Yuda Long, and Xu Zhang. "Digital Simulation of Coupled Dynamic Characteristics of Open Rotor and Dynamic Balancing Test Research." Machines 12, no. 6 (2024): 391. http://dx.doi.org/10.3390/machines12060391.

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An aero engine, as the core power equipment of the aircraft, enables safe and stable operation with a very high reliability index, and is an important guarantee in flight. The open rotor turbine engines (contra-rotating propeller) have stood out as a research hotspot for aviation power equipment in recent years due to their outstanding advantages of low fuel consumption, high airspeed, and strong propulsion efficiency. Aiming at the problems of vibration exceeding the standard generated by imbalance during the operation of the dual-rotor system of aircraft development, the difficulty of identi

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Whalley, R., and A. A-Ameer. "The computation of torsional, dynamic stresses." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 8 (2009): 1799–814. http://dx.doi.org/10.1243/09544062jmes1215.

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The torsional dynamics of spatially dispersed, mechanical, power transmission system models are considered. Distributed—lumped parameter modelling methods are employed in the analysis of configurations comprising rotors, bearings, and relatively slender shaft arrangements. Analysis procedures enabling the computation of the torsional shear stress and velocity response of these drive systems are outlined and block diagram representations are formulated. The transient characteristics for shaft—rotor arrangements following deterministic input changes are computed. Typical rotor—shaft assemblies a

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35

Asdaque, P. M. G. Bashir, and R. K. Behera. "Vibration Analysis of Hollow Tapered Shaft Rotor." Advances in Acoustics and Vibration 2014 (April 28, 2014): 1–14. http://dx.doi.org/10.1155/2014/410851.

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Shafts or circular cross-section beams are important parts of rotating systems and their geometries play important role in rotor dynamics. Hollow tapered shaft rotors with uniform thickness and uniform bore are considered. Critical speeds or whirling frequency conditions are computed using transfer matrix method and then the results were compared using finite element method. For particular shaft lengths and rotating speeds, response of the hollow tapered shaft-rotor system is determined for the establishment of dynamic characteristics. Nonrotating conditions are also considered and results obt

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36

Zhang, Haibiao, Xing Heng, Ailun Wang, Tao Liu, Qingshan Wang, and Kun Liu. "Analysis of Unbalance Response and Vibration Reduction of an Aeroengine Gas Generator Rotor System." Lubricants 13, no. 6 (2025): 266. https://doi.org/10.3390/lubricants13060266.

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To ensure the vibration safety of rotor support systems in modern aeroengines, this study develops a dynamic model of the aeroengine gas generator rotor system and analyzes its complex unbalance response characteristics. Subsequently, it investigates vibration reduction strategies based on these response patterns. This study begins by developing individual dynamic models for the disk–blade system, the circular arc end-teeth connection structure and the squeeze film damper (SFD) support system. These models are then integrated using the differential quadrature finite element method (DQFEM) to c

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37

Li, Zi Gang, and Ming Li. "Non-Linear Dynamics of a Flexible Multi-Rotor Bearing System with a Fault of Parallel Misalignment." Applied Mechanics and Materials 138-139 (November 2011): 104–10. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.104.

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The dynamic behaviors of a flexible multi-rotor system with a fault of parallel misalignment are investigated on the basis of assumptions, such as the long journal bearings, small rotor misalignment and mass disk unbalance. Firstly, based on the Lagrange equations with undetermined multiplier, the dynamic model of a rotor system under the action of the nonlinear oil film forces is developed after taking into account the holonomic constraint, which describes the misalignment relation between two rotors, and the theoretical analysis reveals that the system with eleven DOF is of strong nonlinear

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Lu, Zhenyong, Shun Zhong, Huizheng Chen, Yushu Chen, Jiajie Han, and Chao Wang. "Modeling and Dynamic Characteristics Analysis of Blade-Disk Dual-Rotor System." Complexity 2020 (January 25, 2020): 1–13. http://dx.doi.org/10.1155/2020/2493169.

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In this paper, a simplified dynamic model of a dual-rotor system coupled with blade disk is built, and the effects of blade parameters of an aircraft engine on the dynamic characteristics of a dual-rotor system are studied. In the methodology, the blade is simplified as a cantilever structure, and the dynamical equations are obtained by the means of a finite element method. The amplitude-frequency response curves and orbits of shaft centre-vibration shape diagram are used to analyze the effects of blade parameters on dynamic characteristics of a dual-rotor system. The results indicate that the

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Song, Huiying, Shaohui Wang, and Kai Sun. "Rotordynamic Characteristics Analysis for an aero-engine Low Pressure Rotor Rig Test Model." MATEC Web of Conferences 179 (2018): 03012. http://dx.doi.org/10.1051/matecconf/201817903012.

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3D whole engine finite element model of a low pressure rotor rig test model is established in this paper. Rotorynamic characteristics are mainly analysed with three models, which include rotor model with static stiffness, rotor model with dynamic stiffness, and whole engine model. The calculation results were compared and discussed deeply. Rotordynamic characteristics of rotor model with static stiffness are similar with the rotor model with dynamic stiffness, but the latter may have additional resonance peaks caused by dynamic stiffness. Whole engine model, which can capture the modes of casi

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de Carvalho Michalski, Miguel Angelo, Moysés Zindeluk, and Renato de Oliveira Rocha. "Influence of Journal Bearing Axial Grooves on the Dynamic Behavior of Horizontal Rotors." Shock and Vibration 13, no. 4-5 (2006): 285–300. http://dx.doi.org/10.1155/2006/785823.

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Journal bearing design and the lubricant characteristics are very influential in a rotating machine behaviour. The bearing geometry can drastically affect the lubricant flow and also the rotor dynamics. Approaching that issue, this paper presents an experimental study of the dynamic behavior of a horizontal rotor suported by journal bearings with semi-circular axial grooves. The journal bearings were manufactured with a varied number of axial grooves and a versatile test rig is used, making possible the analysis of different configurations. The acquired signals are analyzed with classical and

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Sun, Jun Yuan, and Ji Ming Xiao. "Dynamic Characteristics Analysis of the Mud Transfer Pump Rotor." Applied Mechanics and Materials 455 (November 2013): 248–52. http://dx.doi.org/10.4028/www.scientific.net/amm.455.248.

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The mud pump damming technology is a new idea put forward for realization of mechanization and automation of warping dam construction. A mud pump damming machine is studied, the FEM of the mud transfer pump rotor is built, modal analysis and rotor-dynamic analysis are carried out, natural frequencies and mode shapes under different constraints are obtained and the critical speeds of the pump rotor are determined, which will provide reference to improve the running reliability of the mud transfer pump rotor.

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Li, Hui, Changzhi Shi, Xuejun Li, Mingfeng Li, and Jie Bian. "Research on Unbalanced Vibration Characteristics and Assembly Phase Angle Probability Distribution of Dual-Rotor System." Machines 12, no. 12 (2024): 842. http://dx.doi.org/10.3390/machines12120842.

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This paper addresses the complex issue of vibration response characteristics resulting from the unbalanced assembly of the double rotors in the 31F aero-engine. The study investigates the vibration response behavior of the dual-rotor system through the adjustment of rotor assembly phase angle. Initially, a dynamic model of the four-disk, five-pivot dual-rotor system is established, with its natural frequencies and vibration modes verified. The influence of size and the position of the unbalance on the vibration amplitude in the dual-rotor system is analyzed. Additionally, the probability distr

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Al Tamimi, Adnan Naji Jameel, and Jassim Farij Thijeel Al Draji. "Numerical Investigation Using Harmonic and Transient Analysis To Rotor Dynamics." Journal of Engineering 22, no. 5 (2016): 108–28. http://dx.doi.org/10.31026/j.eng.2016.05.08.

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The rotor dynamics generally deals with vibration of rotating structures. For designing rotors of a high speeds, basically its important to take into account the rotor dynamics characteristics. The modeling features for rotor and bearings support flexibility are described in this paper, by taking these characteristics of rotor dynamics features into standard Finite Element Approach (FEA) model. Transient and harmonic analysis procedures have been found by ANSYS, the idea has been presented to deal with critical speed calculation. This papers shows how elements BEAM188 and COMBI214 are used to

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Song, Yuxiang, Xinxing Ma, and Zhenguo Zhang. "Simulation and experimental study on impact dynamic characteristics of the spline rotor system." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 3 (2023): 5124–32. http://dx.doi.org/10.3397/in_2023_0728.

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The development of accurate impact dynamics models in rotating machinery with spline couplings is a challenging problem that demands special attention. The dynamic behavior of the system is highly dependent on the spline coupling stiffness, which is nonlinear under different loads. To address this challenge, rotor dynamics models that incorporate spline couplings have been developed. In this paper, firstly, the mechanical model of spline coupling considering large deformation under different loads is established and verified by finite element software. Furthermore, a spline rotor dynamics mode

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Li, Yan, Yan Ouyang, Huisong Wu, Xiping Kou, and Su Jia. "Research for nonlinear vibration characteristics of sealing structure rub-impact between dual-rotor shafts." Journal of Physics: Conference Series 2977, no. 1 (2025): 012053. https://doi.org/10.1088/1742-6596/2977/1/012053.

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Abstract In order to study the influence of sealing structure rub-impact between dual-rotor shafts on nonlinear vibration, a dynamic model of an aero-engine dual-rotor system with sealing structure rub-impact between dual-rotor shafts in consideration was established. The nonlinear vibration phenomenon caused by the rubbing of the sealing structure between dual-rotor shafts was investigated through simulation and experimentation. The result shows that the backward whirling natural frequency of the dual-rotor system will be induced by the sealing structure rub-impact between dual-rotor shafts,

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Wang, Yi Ping, Wen Lei Sun, and Qun Zhao. "Research on Dynamic Characteristics of 750KW Wind Turbine Flexible Blades." Applied Mechanics and Materials 34-35 (October 2010): 1757–60. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1757.

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It is necessary and fitting to use flexible multibody dynamics method to study the wind turbine blades. Because the characteristics of the blades will directly affect the whole wind turbine’s, and the results by using flexible multibody method are to agree with reality. Considering the anisotropic composite blades, it established the flexible blades model and rigid-flexible wind rotor model of the 750KW wind turbine by the software of ANSYS and ADAMS. Then fit the loads which are computed from BLADE to the wind rotor, analyze the dynamic characteristics of the rotor. It gets the dynamic featur

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Niu, Qingfeng, and Mingchuan Yuan. "Numerical Simulation on Dynamic Stall Characteristics of Iced Airfoil for Helicopter Rotor." Journal of Physics: Conference Series 2890, no. 1 (2024): 012061. http://dx.doi.org/10.1088/1742-6596/2890/1/012061.

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Abstract The icing of the rotor blade will change the aerodynamic surface shape of the rotor blade, which will affect the aerodynamic performance of the rotor. In order to study the effect of icing on the stall characteristics of rotor-blade airfoil, especially the dynamic stall characteristics, the airfoil icing shape is obtained by using FENSAP-ICE software, and the dynamic stall characteristics of rotor-blade airfoil OA209 are calculated by using Computational Fluid Dynamics(CFD) software STAR CCM+. The grid of the icing airfoil is an O-shaped grid topology and the background grid adopts a

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Ma, Pingping, Mingxin Shan, Jingyu Zhai, Hao Zhang, and Qingkai Han. "Vibration Characteristics and Simulation Verification of the Dual-Rotor System for Aeroengines with Rub-Impact Coupling Faults." Shock and Vibration 2021 (April 26, 2021): 1–24. http://dx.doi.org/10.1155/2021/6622065.

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To study the rub-impact fault between the dynamic and static parts of the rotor system of aeroengines, the dual-rotor system of a typical aeroengine is introduced and taken as the research object. The analytical kinetic model is established based on the Lagrange equation considering the structural characteristics of the dual-rotor system, the coupling effect of the intermediate bearing, and the rub-impact fault between the high-pressure turbine disc and the casing. The dynamic characteristics of the dual-rotor system under the rub-impact fault are analyzed, and the change rule of the rub-impac

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Zhang, Kai, and Yang Xu. "Preliminary Study on Recontrol Evaluation of a Magnetic Bearing Rotor Falling on Touch-Down Bearings." Energies 17, no. 14 (2024): 3457. http://dx.doi.org/10.3390/en17143457.

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The dynamic control of an active magnetic bearing (AMB) rotor after the rotor falls to its touch-down bearings has always been a difficult problem for applications such as flywheel energy storage. The rotor drop process has obvious nonlinear dynamic characteristics. This paper first discusses the structure of AMBs and the basic principles of their control. Starting from the electromagnetic forces that electromagnets can provide, the problem is simplified to the influence of an electromagnetic force with constant damping characteristics on the dynamic characteristics of a dropped rotor. A dynam

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He, Yuling, Mengya Jiang, Kai Sun, Minghao Qiu, and David Gerada. "Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators." Energies 16, no. 18 (2023): 6585. http://dx.doi.org/10.3390/en16186585.

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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 in

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