Andi Ko

sorry for the unclear question, here I attached my progress. I used rotation load for the moment (applied at the top surface of the locknut) at step 1 with time integration off. in step 2, I did not apply anything here. then, turn on time integration and change the time step to 0.001s

step 3-12, I applied displacement load with 3.5mm and -3.5mm sequences only in x direction so di moving plate will hit the ring.

bottom of the fixed plate and bottom of spindle are fixed support

thank you in advance