Vibration analysis
Vibration analysis refers to deriving of information from existing (mechanical) vibrations e.g. in machines or certain production processes. It can take place during Condition Monitoring, e.g. for drives, punching and pressing tools, in production processes such as balancing of rotating parts, or during other movements such as torsion of towers/wind turbines.
The table below illustrates typical acceleration values for natural and technical processes.
Typical acceleration values
Machine or event | Typical g-value |
|---|---|
Commercial aircraft (take-off) | ≈ 0,5 |
Formula 1 car (start) | ≈ 1 – 1,5 |
Commercial aircraft (turning, max.) | ≈ 2,5 |
Pendulum at 90° amplitude | ≈ 2 |
Space Shuttle during journey into orbit | max. 3 (exact) |
Space Shuttle during re-entry into the Earth's atmosphere | max. 1.6 |
Typical roller coaster ride (max.) | 4 (6) |
Formula 1 car (cornering, max.) | ≈ 4 – 5 |
Circular looping (base) | ≥ 6 |
Combat aircraft/aerobatics (max.) | ≈ 10 (13,8) |
Ejector seat | 15 – 20 |
Car back-rest breaks at | ≈ 20 |
Head-on car collision | up to ≈ 50 |
Car passenger compartment during crash | max. 120 |
Survived by a human | ≈ 180 |
Hard fist stroke | up to ≈ 100 |
Raindrop hitting the eye | up to ≈ 150 |
Ball pen hitting hard floor from 1 m height | order of magnitude 1000 |
Hard disk falling on hard floor from 1 m height (without deformation of the floor) | 10,000 or more |
Laboratory centrifuge | ≈ 10.000 |
Ultra centrifuge | ≈ 100.000 |
Rifle bullet during firing | ≈ 100.000 |
Spike during ejection from a nettle cell | 5.410.000 |
Nuclear bomb explosion (bomb case) | up to ≈ 1011 |
Neutron star surface | ≈ 2·1011 |