Vibration Analysis

Abnormal levels of vibration can cause equipment failure without proper analysis. Vibration, as defined in the dictionary – “a periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed or the state of being vibrated or in vibratory motion as in oscillation or a quivering or trembling motion.”
The important factor in this definition is that vibration is motion. As this motion continues to build up, the level of frequency can change and is undetectable by human touch. In order to obtain valuable data about equipment vibration, we use vibration detection instruments and signature analysis software. We use sensors to quantify the magnitude of vibration and convey them in the following three ways:

  1. Displacement
  2. Velocity
  3. Acceleration

With a good understanding of machine design and operation, we can interpret the information received from testing to define the machine’s problem. Once the information is retrieved, an easy-to-follow report is generated for anyone with basic knowledge to read.

Vibration monitoring and analysis can be performed on these types of equipment:

Unbalance
Eccentric rotors
Misalignment
Resonance problems
Mechanical looseness/weakness
Rotor rub
Sleeve-bearing problems
Rolling element bearing problems
Flow-induced vibration problems
Gear problems
Electrical problems
Belt drive problems


Analyzing this equipment to determine the presence of bad vibration is not a simple task. Properly performed and evaluated tests require highly trained and skilled individuals.