The centrifuge is at the University of Colorado Center for Infrastructure, Energy, and Space Testing. Or more accurately under one of them.
The payload which in the photo my coworker is next to swings up under rotation and the the hydraulic actuator attached to to shakes the samples under test on the adjacent table.
The higher gravity increases the possible resolution of measurement. A typical use would be studying structures or soils (the earthquake liquefaction in Mexico City)
The payload is roughly counter balanced with tungsten carbide chips and an in flight control system is employed to fine tune in operation. There are roller bearings up and down both sides