Static Structural has an Inertial load called Rotational Velocity. That is what you use to create centrifugal force on the mass in the model. All you need to do is define the axis of rotation and the rotational velocity. The solver will apply the correct acceleration as a function of the radius from the axis.
You can use a Static Structural analysis to Pre-Stress the structure prior to extracting modal frequencies in a Modal analysis.
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