Hi All,

I am simulating a rotating drive assembly that is spinning at a constant velocity (~1500 RPM) and wish to examine the axial loading of two bolts that help hold the assembly together. The assembly has compliance and the components are massive enough that gravity will meaningfully contribute to deflection along the assembly's length.

I have successfully run a nonlinear dynamic simulation of the assembly with bolt connectors, centrifugal loading, and a gravitational field that alternates sinusoidally in one plane. However, I would like to impose a trully rotating gravitational field by describing a second acceleration vector that is out of phase with the first. How might I do this? Simulation Pro only seems to allow one time-dependency curve for all 3 gravity vectors and does not allow a second, separate gravity load. Linked values came to mind, but I'm not aware of a way to reference the current solution time value in a parameter expression (for example, to define a second sinusoidal function with a phase shift).

This seems like a fairly routine issue (?), and any input would be appreciated.

Brian