The PSD type can be displacement, velocity, force, pressure, or acceleration.  However, only acceleration and displacement input are supported in the Workbench interface. To use a force PSD input to a Random Vibration analysis, you will need to use some APDL code.  I can't help you with that, someone else will have to help with that.

If the only data you have is what you show in your original post, the time interval of that data is inadequate to use in a Random Vibration analysis.