Examples of Finite Element Analysis
| Seismic Analysis | |
| BWR Condenser | |
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Seismic response spectrum analysis was performed on a condenser of a BWR nuclear plant to demonstrate that it would remain anchored during a severe seismic event. Qualification allowed the condenser to be used for plating out radioactive iodine during an loss of coolant accident. |
| Translational Rotordynamics | |
| PWR Reactor Coolant Pump | |
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A rotordynamic model was developed to resolve problems associated with rotor critical speeds just above running speed. |
| Steam Turbine | |
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A rotordynamic model was developed to test sensitivity of critical speeds to bearing properties for a small coal-fired steam turbine. |
| Torsional Rotordynamics | |
| Aircraft Carrier Steam Turbine | |
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A torsional model of an LP turbine in a nuclear powered aircraft carrier was modeled to determine the feasibility of detecting damage to a single blade using torsional vibration measurement. |
| PWR Reactor Coolant Pump | |
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A torsional rotordynamic model was developed to determine feasibility of detecting shaft cracks during operations using torsional vibration measurement. |
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A combination of models was developed to determine feasibility of detecting a crack in a gear tooth during operation using torsional vibration. The first is a rotordynamic model of the shaft and gear system. The second is a model of the gear teeth, including crack, using contact elements. This second model was to provide torsional forcing functions. Click here for video of cracked tooth results. |
| Vibration Troubleshooting | |
| River Water Pumps | |
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This model was developed to troubleshoot a resonance problem of the pump casing and motor support system that occurred when cutouts were made in the motor support for drainage. The resonant frequency of the system was lowered by making the holes larger. This solved the vibration problems. |
| Design Analysis | |
| Building Floor Vibration | |
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Vibration sensitive microscopes will be used in the third floor laboratories of a university building. The vibration response of people walking in the hallway and laboratories was evaluated to determine effects on the floor vibration that might affect microscope use. |
| MRI Vibration Isolation | |
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A model of a spring support slab was developed to facilitate the design of a vibration isolation system for an MRI installation at a sports medicine facility. The MRI was located 75 ft. from a train track. The isolation system was successful in eliminating disrupting vibration. |
