Guilin Sun
Ansys Employee
The result seems normal to me except further improvement of the accuracy, as you are simulating periodic structure which should have some kind of resonance. The small spikes might be due to not long enough simulation time or not small enough the autoshutoff min. I would suggest you to significantly increase the simulation time, say, 10x, and reduce the autoshutoff min 10x. To speed up the simulation, you can use just mesh accuracy 3.