1shan
Ansys Employee
4 sub-steps is too less for the solution to converge especially with your model. Keep auto time stepping as "ON", minimum sub-steps t0 100 and maximum to 500. Also, it looks like the loading is sinusoidal, it would be a much better choice to do a harmonic response analysis, if you are interested in steady state response only. It is computationally much less expensive. Your model also consists of many small facets, I hope you have merged these or have used virtual topology otherwise there will be problems with your mesh. Also, what is your region of interest? You may want to define other bodies (like the plunger) as rigid. Since rigid bodies are not meshed it will save you a lot of time.

Regards Ishan.