GAS BEARING STABILITY STUDY-VERTICAL ROTOR INVESTIGATION
An analytical and experimental study of the stability of vertical rotors, supported by self-acting gas bearings, is reported. Data are included on forced vibration of an unbalanced rotor, unstable rotors with flexible drive, and instabilities of a direct driven (integral electric motor) rotor. Methods of calculating forced vibration amplitudes due to unbalance are presented, based on previous analytical work, and supported by current experiments. The unstable behavior of a variety of rotors is presented, to illustrate the commonness of half-frequeney conical whirl, and its persistence. Methods of calculating the "threshold of half-frequeney whirl" are given, and verified by experimental results obtained on three different rotors. The technique predicts the mode of whirl to be encountered, and is a useful design tool. (auth)
- Research Organization:
- General Electric Co. General Engineering Lab., Schenectady, N.Y.
- NSA Number:
- NSA-14-017951
- OSTI ID:
- 4191893
- Report Number(s):
- NP-8772
- Country of Publication:
- United States
- Language:
- English
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