Stress Analysis

To achieve a sound rotor design with low vibration and robust stability control, Calnetix builds and analyzes a finite element structural dynamics model of the rotating assembly. This model is used to identify the rotor natural frequencies and mode shapes and to adjust them if necessary and possible to achieve smooth (low vibration) operation. This rotor model is coupled with a state space magnetic bearing model, a housing structural dynamics model, where applicable, and any bearing or seal rotordynamic coefficients required for system operation. The magnetic bearing model is created and analyzed to ensure low vibration and robust stability control over the range of expected machine operating speeds, temperatures, over speed conditions, and other machine parameters required by the application.

• Over-speed condition
• Operating temperature range of the machine
• Temperature distribution within the rotor (based on thermal analysis)
• Manufacturing tolerances of all rotor components