Evolutive and nonlinear vibrations of rotor on aerodynamic bearings |
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Authors: | Ladislav P?st Jan Kozánek |
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Institution: | (1) Institute of Thermomechanics, ASCR, Dolejskova 5, 18200 Prague 8, Prague, Czech Republic |
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Abstract: | The use of air as a lubricant in aerodynamic bearings is advantageous, particularly in the food industry. Aerodynamic bearings
with tilting pads have complicated stiffness and damping properties and need a very detailed theoretical and experimental
research. Response curves of rigid rotor supported on aerodynamic bearings are presented for a linear but evolutive mathematical
model. Due to non-monotone properties of stiffness and damping matrices at variable revolutions, a new resonance appears.
The mathematical model of rotor vibrations in the whole area of bearing clearance is also developed in the consideration of
strongly nonlinear properties of aerodynamic bearing. |
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Keywords: | Rotordynamics Aerodynamic bearings Tilting pads Numerical solution Large displacements Response curves Vibrations |
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