Results 1 to 10 of about 3,667,485 (307)
Nonlinear dynamics of a dual-rotor-bearing system with active elastic support dry friction dampers
Nonlinear dynamicsIn present study, the modified harmonic balance-alternating frequency/time domain (HB-AFT) method with embedded arc-length continuation method is used to study the nonlinear dynamic characteristics of dual-rotor-bearing system with active elastic support
O. Xu, Shuqian Cao, Guanwu Li
semanticscholar +1 more source
Lubricants, 2022 Gas bearings have been widely applied to high-speed rotating machines due to their low friction and high rotational speed advantages. Nevertheless, gas lubrication is low viscosity and compressible.
Jianbo Zhang +9 more
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A Nonlinear Model for Prediction of Dynamic Coefficients in a Hydrodynamic Journal Bearing
International Journal of Rotating Machinery, 2004 This paper investigates the variation of nonlinear stiffness and damping coefficients in a journal orbit with respect to equilibrium position. The journal orbit is obtained by the combined solution of equations of motion and Reynolds equation.
Jerzy T. Sawicki, T. V. V. L. N. Rao
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Experimental study of the aircraft air cycle machine rotor dynamics on gas foil bearings [PDF]
MATEC Web of Conferences, 2020 In this paper the results of the experimental research of the dynamics of the rotor of a four-wheeled aircraft air cycle machine on gas foil supports under conditions of vibration.
Tishhenko Igor Valerevich +2 more
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Impact of Heat Treatment on the Rubbing Behavior of Bump-Type Foil Journal Bearing
Tribology OnlineUnder low-speed or start/stop conditions, the rubbing of top foil in foil journal bearing (FJB) prompting the application of heat treatment to improve the rubbing behavior of the foil bearing.
Vishal Mourya, Skylab P. Bhore
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Modelling of Shaft Orbiting with 3-D Solid Finite Elements
International Journal of Rotating Machinery, 1999 A 3-D solid finite element model which can include bending, torsional, axial and other motions is proposed to analyse dynamic responses of shafts. For uniform shafts, this model shows consistency with beam theories when bending vibration is examined. For
J. Yu, A. Craggs, A. Mioduchowski
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Helicopter Roll-Axis Instabilities induced by Pilot Cyclic Control: A Physical Explanation [PDF]
INCAS Bulletin, 2018 The main objective of this paper is to give a basic understanding of the mechanisms through which pilot cyclic inputs in lateral cyclic interacts with high-order rotor dynamics destabilizing the helicopter roll motion.
Marilena D. PAVEL, Achim IONITA
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Effect of Bearing Housings on Centrifugal Pump Rotor Dynamics
, 2017 The article deals with the effect of a bearing housing on rotor dynamics of a barrel casing centrifugal boiler feed pump rotor. The calculation of the rotor model including the bearing housing has been performed by the method of initial parameters.
A. Yashchenko +3 more
semanticscholar +1 more source
Differential Flatness of Quadrotor Dynamics Subject to Rotor Drag for Accurate Tracking of High-Speed Trajectories [PDF]
IEEE Robotics and Automation Letters, 2017 In this letter, we prove that the dynamical model of a quadrotor subject to linear rotor drag effects is differentially flat in its position and heading. We use this property to compute feedforward control terms directly from a reference trajectory to be
Matthias Faessler +2 more
semanticscholar +1 more source
Cavitation Effects on the Stability of a Submerged Journal Bearing
International Journal of Rotating Machinery, 2004 A computational procedure for the mechanism of shear between the liquid sublayer and air cavity in the cavitation zone of a submerged journal bearing is presented here. Using the mass conservation principle, Elrod's universal equation is modified to take
Jerzy T. Sawicki, T. V. V. L. N. Rao
doaj +1 more source