Definition
Vibration is the oscillating mechanical motion of a machine or component around a reference position, whose amplitude, frequency, and pattern reveal information about its mechanical condition: a specific frequency at 1x running speed suggests imbalance, for example, while other patterns point to misalignment or looseness. It is the observable phenomenon; vibration analysis and vibration sensors are the tools that measure and interpret it.
Key facts
- The physical phenomenon itself (oscillating motion) not the measurement instrument (vibration sensor) or the interpretive method (vibration analysis) applied to it.
- Its frequency content is diagnostically meaningful: specific frequencies relative to running speed point toward specific mechanical conditions.
- Can arise from normal operation at low levels, or indicate a developing fault at abnormal levels or unexpected frequencies.
- A key input to condition-based and predictive maintenance for rotating equipment specifically.
What does Vibration reveal about failures?
Vibration is the physical, oscillating motion a machine or component exhibits during operation, arising from rotating imbalance, meshing gear teeth, bearing rolling contact, fluid flow, or a developing mechanical fault, and observable as displacement, velocity, or acceleration over time.
How it differs from a vibration sensor and vibration analysis
Vibration is the physical motion itself. A vibration sensor is the instrument used to measure that motion and convert it into an electrical signal. Vibration analysis is the interpretive method applied to the resulting data, extracting frequency content to diagnose the specific mechanical condition (imbalance, misalignment, looseness) responsible for the observed vibration.
FAQ
Frequently asked questions
What is a vibration as an observable machine phenomenon?
It is the oscillating mechanical motion of a machine or component, whose amplitude and frequency content (captured by a vibration sensor and interpreted through vibration analysis) reveal information about its mechanical condition.
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