Results 231 to 240 of about 3,667,485 (307)
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Hydrodynamic Journal Bearings Optimization Considering Rotor Dynamics Restrictions
Volume 7B: Structures and Dynamics, 2018In this study, optimal designs of hydrodynamic journal bearings for 13.5 MW induction motor prototype is developed based on the design of experiment approach and best sequences method which involves entire rotor-bearing system multidisciplinary ...
L. Moroz +3 more
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Consistent matrices in rotor dynamic
Meccanica, 1985The expressions for the consistent mass and gyroscopic matrices for a constant section shaft element are obtained taking into account both shear deformation and transversal inertia. The results are compared with closed form solutions, which are available in simple cases.
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Rotor Dynamics of Overhung Rotors: Hysteretic Dynamic Behavior
Volume 7: Structures and Dynamics, Parts A and B, 2012Overhung-configuration rotors are commonly used in the oil, gas and process industries. Examples of this type of equipment include power turbines, Fluid Catalytic Cracking (FCC) expanders, turbochargers and pipeline boosters. Generally, in overhung-configuration rotors, the mass concentration is near the bearing on the overhung end, so the rotor ...
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Topological Dynamics in Supramolecular Rotors
Nano Letters, 2014Artificial molecular switches, rotors, and machines are set to establish design rules and applications beyond their biological counterparts. Herein we exemplify the role of noncovalent interactions and transient rearrangements in the complex behavior of supramolecular rotors caged in a 2D metal-organic coordination network.
Palma, Carlos-Andres +5 more
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On the Zero Dynamics of Helicopter Rotor Loads
European Journal of Control, 1996This paper contains some basic analysis of helicopter blade dynamics. The authors comment that many textbooks such as recent book by \textit{A. R. S. Bramwell} [Helicopter dynamics, Edward Arnold Publishers, London (1996)] are primarily concerned with stability.
Sergio Bittanti, Marco Lovera
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Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 1998
Abstract The modelling, simulation and analysis of powered rotors with ‘long’ thin shells is investigated. General results enabling the prediction of the torsional vibrational signature of high-speed assemblies under acceleration or braking conditions are outlined.
H Bartlett, R Whalley
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Abstract The modelling, simulation and analysis of powered rotors with ‘long’ thin shells is investigated. General results enabling the prediction of the torsional vibrational signature of high-speed assemblies under acceleration or braking conditions are outlined.
H Bartlett, R Whalley
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Vibration mitigation and dynamics of a rotor-blade system with an attached nonlinear energy sink
International Journal of Non-Linear Mechanics, 2020Excessive vibration of rotor-blade systems has been a main reason for the failure of rotating machinery. Therefore, methods capable of simultaneously suppressing vibrations rotor and blade are urgently needed.
Yanbo Cao +4 more
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Dynamics of coupled rotors in external fields
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2023Coupled hindered rotor model is crucial for exploring the rotational dynamics of complex molecules under different external environments. When coupled hindered rotor molecules are subjected to the combined action of static electric and laser fields, their rotational dynamics get significantly modified, leading to interesting physics.
Sumana, Devi, Vinod, Prasad
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Dynamics of a Pair of Interacting Rotors
Molecular Crystals and Liquid Crystals, 1973As a preliminary investigation of coupled rotation relevant to plastic crystals, the dynamics of two rigid-molecule rotors with parallel fixed axes is studied for a cosine potential of interaction. The problem is separable in terms of the sum and difference of the molecular angular displacements, and is soluble exactly; both quantum-mechanical and ...
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2011
The helicopter’s main source of propulsion is provided by the main and tail rotor. The aerodynamic forces and moments are nonlinear functions of motion characteristics and controls. Due to the complexity and the uncertainty associated with the aerodynamic phenomena, a detailed model of the forces and moments produced by the main rotor would be of high ...
Ioannis A. Raptis, Kimon P. Valavanis
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The helicopter’s main source of propulsion is provided by the main and tail rotor. The aerodynamic forces and moments are nonlinear functions of motion characteristics and controls. Due to the complexity and the uncertainty associated with the aerodynamic phenomena, a detailed model of the forces and moments produced by the main rotor would be of high ...
Ioannis A. Raptis, Kimon P. Valavanis
openaire +1 more source