Results 11 to 20 of about 13,672 (265)
Oil Whirl of Flexible Rotors [PDF]
Proceedings of the Institution of Mechanical Engineers, 1962 The equations for a flexible rotor in journal bearings are set up and solved, extending the method previously used by Hummel and Cameron. It is shown that if w is the natural elastic frequency of the rotor, A the resonant oil frequency for an infinitely stiff but otherwise identical rotor, then the combined frequency s is given by l/ s2 = 1/Λ2 + 1/ w2.
Z. Parszewski, A. Cameron
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Stochastic modeling of flexible rotors [PDF]
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2012 Flexible rotors are characterized by inherent uncertainties affecting the parameters that influence the dynamic responses of the system. In this context, the handling of variability in rotor dynamics is a natural and necessary extension of the modeling capability of the existing techniques of deterministic analysis.
Koroishi, Edson H. +3 more
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Vietnam Journal of Mechanics, 2000 This paper presents the influence coefficient method of determining the locations of unbalances on a flexible rotor system and the correction weights. A computer software for calculating the at-the-site balancing of a flexible rotor system was created ...
Nguyen Van Khang, Tran Van Luong
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Experimental and Numerical Investigations of a Flexible Rotor on Flexible Bearing Supports
International Journal of Rotating Machinery, 2005 The main goal of this paper is to study, numerically and experimentally, the effects of the bearing support flexibility on the rotor dynamic and the first forward and backward critical speeds.
J.-J. Sinou, C. Villa, F. Thouverez
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Calculation method for natural frequency of rotors considering load distribution in stepped parts
Nihon Kikai Gakkai ronbunshu, 2022 To improve the product performance of turbomachinery and ensure vibration reliability, we propose a method for predicting natural frequencies that considers the decrease in the stiffness of the rotor stepped part.
Kazuyuki YAMAGUCHI +2 more
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Stability Analysis of a Flexible Bladed-Rotor [PDF]
Key Engineering Materials, 2005 In any high-performance turbo-machinery, instability and damage are commonly occurring problems. The aim of this paper is to present a stability analysis of a fully-bladed flexible rotor. The flexural vibrations of the blades as well as those of the shaft are considered; the energetic approach used includes the effect of the rotational inertia.
Lesaffre, Nicolas +2 more
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Advances in Mechanical Engineering, 2018 Recently, magnetic bearings have been applied to many rotating machines such as turbo-molecular pumps, cooling gas compressor, flywheel energy storage systems.
Shaolin Ran, Yefa Hu, Huachun Wu
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Magnetic suspension motorized spindle-cutting system dynamics analysis and vibration control review
Journal of Hebei University of Science and Technology, 2016 The performance of high-speed spindle directly determines the development of high-end machine tools. The cutting system's dynamic characteristics and vibration control effect are inseparable with the performance of the spindle,which influence each other,
Xiaoli QIAO
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Development of a Flexible Lightweight Hydraulic-Pneumatic Flywheel System for Wind Turbine Rotors
Fluids, 2020 In this paper, the design of a flexible piston accumulator for application in a hydraulic-pneumatic flywheel system in a wind turbine rotor is presented.
Laurence Alhrshy +2 more
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Transactions of the Japan Society of Mechanical Engineers, 1972 A study of balancing of flexible rotors with uniform cross sections supported by two bearings at both ends is performed by calculation, putting m as the number of critical speeds which are in the operating speed range. Using m+2 balancing planes, we can eliminate the static and dynamic unbalances at low speeds and the vibration components of the normal
Toshiji OMORl +2 more
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