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Transient trajectory of journal in hydrodynamic bearing. (English) Zbl 0964.76021

A technique, based on analytical two-dimensional pressure distribution, is developed to determine the nonlinear journal trajectory under application of dynamic loads, including journal unbalance and inertia forces. The authors use a global Newton-Raphson method which ensures a fast convergence. The results for rod bearings indicate that, at high rotation speeds, inertia forces due to journal motion are significant and cause an increase in the journal eccentricity ratio.

MSC:

76D08 Lubrication theory
76U05 General theory of rotating fluids
76A20 Thin fluid films
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