Vibration Analysis - Impeller
(ANSYS) Finite Element Model of Impeller


Impeller, shaft and bearings form a dynamic system

We performed a vibration analysis on an ASTM A514 Grade B Steel industrial impeller determine its natural frequencies. The proposed impeller design was intended to be used in a variety of applications and therefore under different operating conditions. 

The fan is mounted on a drive shaft, which is supported by bearings. The impeller, shaft and bearings form a dynamic system – and any imbalance in the impeller and/or shaft can produce harmonic excitations to the system.

To perform the vibration analysis, finite element models were analyzed in conjunction with rotordynamic capabilities available in the ANSYS Mechanical software. The analysis included:
1. Creating a 3-D finite element model of the impeller from a CAD model supplied by the client
2. Modal analysis to determine the natural frequencies of the impeller.
3. Detailed harmonic stress analyses for the six operating speeds and two temperatures.
4. Fatigue evaluation for the harmonic loads.


Our Team of Engineers performs thermal, stress and vibration analysis for clients in industries including energy, manufacturing and petrochemical.

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Tom O’Donnell, PE
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