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A compupational approach to stability analysis of synchronous vibration of rotors supported by journal bearings taking into account turbulent flow in the oil film

Zapomel J.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

2005

z. 29

523-526

The described method represents a computational approach to stability analysis of steady-state vibration of rotors supported by fluid film bearings produced by imbalance of the rotating parts. Pressure distribution in the bearing gap is determined by means of a Reynolds equation derived in the form that makes possible to take into account not only laminar but also transient and turbulent flow in the oil layer. Modification of the correction coefficients calculated according to Constantinescu gives results that from the physical point of view correspond better to the character of flow in the laminar and transition areas. A trigonometric collocation method, a perturbation technique, and a Floquet theory have been applied for determination of the steady-state response of the rotor system and for judgement of its stability.