Spectral Analysis
Pump spectral analysis separates the overall vibration level into amplitudes at discrete frequencies and is helpful in determining the cause of the vibration. For example, a peak at the running speed (1X RPM) may indicate rotor imbalance, while a peak at the blade passing frequency (BPF = Z x RPM where Z is the number of impeller vanes) typically indicates a hydraulic issue.
Modal Analysis
Modal analysis is used to characterize resonant vibration in machinery and structures. Resonant vibration can cause or contribute to a wide variety of machinery problems which include:
- Accelerated component wear
- Inability to maintain tolerances
- Premature fatigue
- Unacceptable noise levels
Operating Deflection Shape (ODS)
An ODS is the simplest way to see how a machine or structure moves during its operation, either at a specific frequency or at a moment in time. These shapes are used to determine vibration mode shapes as well as internal and external excitation forces.
Advanced Vibration and System Analysis
- Impact testing
- High resolution analysis
- Bearing/ gear analysis
- Run-up and coastdown testing
- Cross channel amplitude/ phase
- Orbit plotting
- Pressure pulsation testing
Typical Instrumentation
- Multi-channel vibration spectrum analyzer
- Post processing modal and ODS software
- Calibrated impact hammers
- Data recorders
- Wireless data transmitters