Results 21 to 30 of about 3,352,928 (273)
The Dynamics of Rotor with Rubbing [PDF]
International Journal of Rotating Machinery, 1998 This paper presents the description of some phenomena associated with dynamic behavior of rotors interacting with stationary components. Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi‐periodic, and chaotic vibrations. The nonlinear calculation techniques are applied to demonstrate the changes of the vibration patterns ...
Jerzy T. Sawicki +2 more
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Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]
, 2010 The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Fletcher, Timothy M., Brown, Richard
core +4 more sources
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016 Elastic-damping supports are widely spread in the design of aviation gas-turbine engines. These supports include elastic elements of the squirrel cage type.
S. A. Degtyarev +2 more
doaj +1 more source
Modal Testing of Rotors with Fluid Interaction
International Journal of Rotating Machinery, 1995 Modal testing of rotating structures has specific aspects, and it requires a specialized approach. Classical modal testing when applied to active (rotating) structures does not provide complete results.
Agnes Muszynska
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The rotor dynamics of reeling machinery
Applied Mathematical Modelling, 1999 Wide-faced rotors for high-speed reeling operations such as those employed in paper manufacture, printing, coating and laminating are considered, and the torsional behaviour of these units is investigated. Modeling, simulation and analysis techniques are involved enabling the prediction of the torsional vibrational signature of high-speed assemblies ...
Bartlett, H., Whalley, R.
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International Journal of Rotating Machinery, 1999 The transient process which starts at the instability threshold of a rotor rotating in a fluid environment, and ends up in the limit cycle of self-excited vibrations known as fluid whirl or fluid whip, is discussed in this paper.
Agnes Muszynska
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Effect of rotor stiffness and lift offset on the aeroacoustics of a coaxial rotor in level flight [PDF]
, 2009 The acoustic characteristics of a twin contra-rotating coaxial rotor configuration with significant flapwise stiffness are investigated in steady forward flight.
Kim, Hyo Wan +2 more
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International Journal of Rotating Machinery, 1996 The paper presents the dynamic analysis of an anisotropic rotor system with fluid interaction by using modal nonsynchronous perturbation testing and dynamic stiffness approaches.
Eungu Jang +3 more
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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
doaj +1 more source