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Torsional Vibration Analysis & Testing
Torsional vibration measurements are used to determine the natural frequencies and mode shapes of a rotor train as it twists about the axis of rotation.
Performing Torsional Vibration Measurements
The shaft is instrumented with either strain gages or accelerometers at one or more locations. Signals from the rotating sensors are transmitted to a stationary data acquisition system by radio telemetry.
Our torsional vibration measurement service may also be used to determine shaft torque, shaft bending strain and turbine blade vibration.
Torsional Vibration Services Offered:
- Torsional vibration natural frequency measurement
- Torsion and lateral testing
- Determine torsional critical speed
- Fatigue cumulative damage modeling
- Torsional vibration monitoring
- Verify analytical models
- Campbell testing
- Strain gage telemetry
- Turbine telemetry
Importance of Torsional Vibration Measurements
The Cost Burdens of Accumulative Fatigue
Shaft torsional vibration in large steam turbine-generator units is produced by momentary grid disturbances and negative sequence currents.
In addition, shaft natural frequencies can be directly associated with the prevalent torsional excitation, augmenting the subsequent vibratory response.
If these vibrations persist and go undetected, accumulative fatigue can damage rotor elements such as turbine blades, retaining rings, and couplings.
In terms of cost analysis, the price businesses pay upfront for testing/consulting services is miniscule compared to that of a complete unit restoration, not including the comprehensive failure investigation which would need to be conducted beforehand.
Advanced computational methods are employed by SimuTech Group engineers in the field to determine shaft natural frequencies throughout the design phase so that detrimental resonance conditions can be avoided.
Contact for Torsional Vibration Measurements Testing
Our Commitment to Quality
SimuTech Group is committed to offering the highest quality professional service at extremely competitive rates as well as safety and compliance with OSHA and other safety standards imposed by regulating bodies including the standards developed by the customer.
All representatives of SimuTech Group working in the field carry current first aid, AED, and CPR credentials and are professionally trained for working at heights and working in confined spaces.
Related Mechanical Testing Services Offered
Generator Vibration
Performing vibration tests on utility scale electric power generators in fossil and nuclear plants.
Ground Vibration Testing
Measure the dynamic response characteristics of an airframe with MIMO signal processing and analysis.
Campbell Testing
Measuring the natural frequencies and mode shapes of rotating turbine blade (bucket) rows.
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Our team of experienced engineers can assist you at any step of your process.