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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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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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The dynamics of viscoelastic rotors
Dynamics and Stability of Systems, 1987The stability of two mathematical models of a viscoelastic rotor—a 2-parameter solid model and a 3-parameter solid model—is investigated by means of a complex Routh—Hurwitz analysis. While the 2-parameter model possesses a certain well-known stability limit for the angular velocity, it is shown that the 3-parameter model has two stable regions for the ...
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1963
Abstract : The determination of the critical speeds of a flexible rotor is usually carried out on the assumptions of negligible bearing mass and stiff ness. In this report the effect of bearing mass and stiffness on the natural frequencies of a uniform flexible shaft is found.
D. E. Dawson, J. E. Panarelli
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Abstract : The determination of the critical speeds of a flexible rotor is usually carried out on the assumptions of negligible bearing mass and stiff ness. In this report the effect of bearing mass and stiffness on the natural frequencies of a uniform flexible shaft is found.
D. E. Dawson, J. E. Panarelli
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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
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Rotor Neurons: Basic Formalism and Dynamics
Neural Computation, 1992Rotor neurons are introduced to encode states living on the surface of a sphere in D dimensions. Such rotors can be regarded as continuous generalizations of binary (Ising) neurons. The corresponding mean field equations are derived, and phase transition properties based on linearized dynamics are given.
Lars Gislén +2 more
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Dynamics of Rotors and Foundations
19931 Introduction.- 2 The one Degree of Freedom System.- 3 Shaft with Central Disc.- 4 Shaft with Non Central Disc.- 5 The Short and the Long Rotor.- 6 Oil-Film Bearings.- 7 Rotors with Oil-film Bearings.- 8 Vertical Rotors.- 9 Rolling-element Bearings.- 10 Shaft Seals.- 11 Steam Whirl.- 12 Internal Damping.- 13 Non-circular Shafts.- 14 Computer Model ...
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Dynamic balancing of small gyroscope rotors
Electrical Engineering, 1937Discussion of papers published in the June 1937 issue, pases 706–10 and 729–34, and presented for oral discussion at the vibration and balance session of the summer convention, Milwaukee, Wis., June 25,1937.
O. E. Esval, C. A. Frische
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Introduction to Rotor Dynamics
2013Rotor-dynamics studies the lateral and torsional vibrations of rotating shafts, with the objectives of predicting the rotor vibrations and constraining the vibration level under an acceptable limit. In this chapter we present a short introduction to rotor dynamics to familiarize the reader with the basic concepts and terminologies commonly used in ...
Se Young Yoon +2 more
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