Fatigue Analysis
Services
At Asset Integrity we specialise in fatigue assessments and prediction of dynamic stress. Our extensive experience with finite element analysis (FEA) and field measurements has allowed us to refine our modelling and prediction processes to deliver results which resemble the real world.
Our capabilities in the field also mean that we can calibrate our models and provide re-assurance that your asset is fit for service. Our primary focus is the prevention of failures and ensuring the smooth operation of your asset. Complimenting services which Asset Integrity can provide include finite element analysis (FEA), pipe stress analysis, structural analysis, flow induced vibration (FIV) calculations, acoustically induced vibration (AIV) calculations, water hammer analysis, on-site measurements and troubleshooting.
About Dynamic Stress & Fatigue Analysis
Fatigue failures in shafts, structures, piping, small bore connections, pressure vessels, rotating equipment and machine components can cause an unplanned shutdown of a critical asset, production delays and maintenance costs, gas release, and in serious cases have the potential to injure personnel.
Finite Element Analysis (FEA), Statistical Energy Analysis (SEA), and data acquisition (e.g. vibration and strain measurements) are invaluable tools that can be used to predict dynamic stress levels or the expected life of an asset (i.e. fatigue analysis).
The failure of small-bore fittings (SBF’s), also referred to as small bore connections or cantilevered fittings, has been recently recognised in the oil and gas industry as one of the key items at high risk of fatigue failure. To combat excessive SBF vibration, sufficient thought and analysis must be given to the design of each fitting arrangement.
REQUEST QUOTE
“Our primary focus is the prevention of failures and ensuring the smooth operation of your asset.”
| Typical Problem | Analysis Type | Asset |
|---|---|---|
| Fatigue analysis for piping, small bore fittings (SBF’s) and instrumentation at risk of fatigue failure | - FEA - Fatigue Assessment - Field Measurements | - Piping - Small Bore Fitting (SBF) - Instrumentation |
| Elevated vibration levels measured on gearbox housing during operation | - FEA - Field Measurements | - Gearbox |
| Repeated cracking of feeder plate welds | - FEA - Fatigue Assessment - Field Measurements | - Feeder |
| Dynamic stress predictions for structures (including offshore structures) | - FEA | - Structure - Equipment Package |
| Fatigue analysis for thermowells exhibiting high noise and vibration | - FEA - Fatigue Assessment - Field Measurements | - Thermowell |
| Repeated failure of exhaust system (manifold and muffler systems) | - FEA - Fatigue Assessment - Pulsation | - Reciprocating Engine - Exhaust System |
| High levels of high frequency vibration measured on pipe wall causing concern for failure | - FEA / SEA - Field Measurements | - Piping |
| Dynamic stress and vibration/failure predictions for structures, piping, valves, fittings, instrumentation and components | - FEA - Fatigue Assessment | - Structure - Pipe / Valve / Fitting - Component - Instrumentation |
| Structural integrity check for vibrating screens and associated structure | - FEA | - Vibrating Screen - Structure |
| Stress predictions for a pump shaft during start-up (transient analysis) | - Transient FEA | - Pump - Structure |
| Design stress check for dynamic loading of pressure vessel nozzles | - FEA | - Pressure Vessel |
| Vibration and stress predictions for high compressor cylinder vibration | - FEA | Reciprocating Compressor |
| Failure investigation for small bore fitting arrangements | - FEA - Fatigue Assessment - Field Measurements | - Small Bore Fitting (SBF) |
| Fatigue analysis for a centrifugal compressor shaft | - FEA - Fatigue Assessment | - Centrifugal Compressor |
| Development of vibration screening limits for piping, small-bore fittings (SBF’s), thermowells and structures | - FEA | - Structure - Pipe / Valve / Fitting - Thermowell |
| Analyse measured strain data on shafts to predict fatigue damage | - Field Measurements - Fatigue Assessment | Rotating Equipment |
| Excessive compressor manifold vibration causing high suspected nozzle stresses | Field Measurements FEA Fatigue Assessment | Reciprocating Compressor |
| Structural analysis for a belt conveyor system | Static/Dynamic |