OPERATING TURBOMACHINERY ON OR NEAR THE SECOND CRITICAL SPEED IN ACCORDANCE WITH API SPECIFICATIONS

@inproceedings{Nicholas1989OPERATINGTO,
  title={OPERATING TURBOMACHINERY ON OR NEAR THE SECOND CRITICAL SPEED IN ACCORDANCE WITH API SPECIFICATIONS},
  author={John C. Nicholas},
  year={1989}
}
The question of when is it safe to operate turbomachinery on or near the second critical speed is addressed. A parallel evolutionary progression of the API rotordynamic specifications and rotordynamic analysis capabilities is discussed. Actual test stand results are presented, illustrating second critical speeds near the operating range with high amplification factors and low amplification factors. Their rotordynamic characteristics are discussed in reference to the old and new API… CONTINUE READING

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