To show a changing (dynamic) load you would need Simulation Premium, which includes the dynamics module. You would then be able to export your labview results to excel file and then import them in to simulation. They would be entered in to the Force as a time curve showing variations in the application of a maximum load case (e.g. for a maximum load of 10, at 0 seconds apply 0% of this load at 0.5 seconds apply 50% of the load etc).
Without the dynamics module I would use a design study to run a range of scenarios where the load is the changing variable. Although this would not take in to account the weakening of the beam due to previous loads it would give an idea of the structures response across a range of loading scenarios.
what would you want to learn from solidworks simulation that you aren't getting from the testing?
and does it need to be "real time"? like peter said the loading condition can be imported as a load but without api you wouldn't have it real time. and if it was real time, why would you want it to be real time?