Vibration Analysis
Vibration analysis is the measurement and interpretation of machine vibration to detect conditions such as imbalance, misalignment, looseness, resonance, and bearing damage.
What this term means in maintenance
Vibration analysis is the measurement and interpretation of machine vibration to detect conditions such as imbalance, misalignment, looseness, resonance, and bearing damage.
What vibration analysis can detect
Depending on the machine and measurement quality, vibration may indicate:
- Imbalance
- Misalignment
- Mechanical looseness
- Bearing defects
- Gear defects
- Resonance
- Bent shaft
- Cavitation
- Electrical problems
- Structural weakness
Practical example
A motor shows increasing vibration at twice running speed with high axial vibration. Alignment is checked and corrected before coupling and bearing damage develops.
Measurements and trends
Useful vibration analysis may review:
- Overall vibration
- Time waveform
- Frequency spectrum
- Phase
- Envelope or demodulation
- Operating speed
- Load and process condition
- Historical trend
Importance of repeatability
Measurement location, sensor direction, mounting method, operating condition, and instrument settings should remain consistent.
Common mistake
One high reading does not automatically prove a specific fault. The analyst should consider machine design, operating condition, trend, and supporting evidence.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Condition Monitoring
Condition monitoring is the systematic collection and review of equipment-condition information to identify deterioration, abnormal operation, or developing failure.
Predictive Maintenance
Predictive maintenance uses condition data, trends, and analytical methods to estimate when equipment degradation may require maintenance.
Equipment Availability
Equipment availability is the percentage of required or scheduled time during which an asset is capable of performing its intended function.
Vibration Analysis FAQs
- What faults can vibration analysis detect?
It can indicate imbalance, misalignment, looseness, bearing defects, gear problems, resonance, cavitation, and some electrical faults.
- Should vibration readings be trended?
Yes. Trends help distinguish deterioration from normal variation.
- Can one high vibration reading confirm a fault?
Not always. Operating condition, measurement quality, spectrum, machine design, and supporting evidence should be reviewed.