I am part of a group creating a test bench for a hardware-in-the-loop simulation of an electric vehicles powertrain.
We are doing a harmonic response analysis to examine how the bench will vibrate, however we are unsure if we are applying the correct loads or if our model is correct.
On top of the bench structure is a running track. The bench and the running track are connected using dampeners; in our Ansys model we have used springs. On the running track are two motors, which can each produce 100 Nm of torque. The motors act in opposite directions as one acts as a brake. They are connected via shafts and a coupling.
Below is our completed model where you can see the motor, the brake, the running track and the bench. The bolts present between the running track and the bench are where the dampers shall be.
For our Ansys model, we have accounted for the motors by using point masses and moments.
The bench is created using beam elements. The model is illustrated below.
We are unsure if the moments we are applying are the correct excitation loads for the harmonic response. We would greatly appreciate suggestions or considerations.