Rotor dynamics damped system

The rotor vibrations shown correspond to a common unbalance for all cases and, as might be expected, the stiff rotor system is much less sensitive than the flexible rotor system. It is common knowledge that a plain circular profile results in the best synchronous damping properties in hydro-dynamic bearings. The relative figures in table 1 show that the partially grooved bearings approach the circular in this respect. 

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