Turbomachinery Rotordynamics With Case Studies Pdf [verified] Link

Synchronous unbalance response plots showing peak amplification factors.

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). As the motor accelerates from 0 to synchronous speed, this excitation frequency sweeps downwards from 120 Hz to 0 Hz. The simulation showed that this transient excitation intersected the first torsional natural frequency (TNF) of the shaft string at 45 Hz. The train spent too much time passing through this resonance point due to a high-inertia coupling selection. As the motor accelerates from 0 to synchronous

The bolted joints were redesigned to increase the preload and the friction coefficient at the interface, effectively "locking" the joints and suppressing the coupling effect. The vibration anomaly disappeared. The bolted joints were redesigned to increase the