Results 21 to 30 of about 589,600 (262)
Model Analysis of Axial PM Bearingless Flywheel Machine
IEEE Access, 2022 The special rotor structure of the axial permanent magnet (PM) bearingless flywheel machine (APM-BFM) makes its critical speed more easily affected at high speed, but there are few studies on its rotor dynamics, especially under load conditions.
Zhiying Zhu +4 more
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Critical Vibration and Control of the Maglev High-Speed Motor Based on μ–Synthesis Control
Sensors, 2022 The Maglev motor has the characteristics of high-speed and high-power density, and is widely used in compressors, molecular pumps and other high-speed rotating machinery.
Yefa Hu +4 more
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NUMERICAL PREDICTION OF SOLITARY WAVE FORMATION OF A PLANING HULL IN SHALLOW WATER CHANNELS
Brodogradnja, 2020 This paper uses a CFD (Computational Fluid Dynamics) analysis to investigate the shallow water effects on prismatic planing hull. The turbulence flow around the hull was described by Reynolds Navier Stokes equations RANSE using the k-ɛ turbulence model ...
Tamer M. Ahmed +4 more
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1995 Internal resonance of cracked rotors is investigated using 2-degree-of-freedom rotor systems. Phenomena at the major critical speed and other subcritical speeds in the precritical speed range are discussed theoretically and experimentally. Phenomena in a lateral oscillation model with internal resonance and in an inclination oscillation model with no ...
ISHIDA, Yukio, HIROKAWA, Kazuharu
openaire +2 more sources
Mechanical Engineering Journal, 2019 These days, centrifugal compressors and other industrial turbomachines tend to be faster, downsized, and reduced in cost. If a technology can be established for operation of machines over higher critical speed using an active magnetic bearing, the number
Hiroyuki FUJIWARA +3 more
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Critical Speed Control for a Fixed Blade Variable Speed Wind Turbine
Energies, 2017 A critical speed controller for avoiding a certain rotational speed is presented. The controller is useful for variable speed wind turbines with a natural frequency in the operating range.
Morgan Rossander +2 more
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Sports, 2020 Maximal oxygen uptake (VO2max) and critical speed (CS) are key fatigue-related measurements that demonstrate a relationship to one another and are indicative of athletic endurance performance.
Joshua D. Dexheimer +5 more
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A Dynamic Analysis of a Flexible Rotor in Ball Bearings with Nonlinear Stiffness Characteristics
International Journal of Rotating Machinery, 1997 This paper presents an effective analysis approach for a flexible rotor in ball bearings with nonlinear stiffness characteristics to obtain realistic dynamic behavior results.
Dong-Soo Lee, Dong-Hoon Choi
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Sensors, 2014 The objective of the present study was to deal with the rotordynamics of the rotor of an ultra-high speed PM type synchronous motor-generator for a 500 W rated micro gas turbine generator.
Do-Kwan Hong +4 more
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Evaluation of Critical Speed for Active Steering Bogie Prototype [PDF]
한국정밀공학회지, 2017 Critical speed analysis was conducted for a active steering bogie prototype, developed to improve the curving performance of railway vehicles. The critical speed for the design concept was about 169.2k m/h. To validate the analysis result, we performed a
Hyun Moo Hur, Joon-Hyuk Park
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