Is there any platform in ANSYS workbench where I can build ROM for non-linear transient systems?
You can create ROMs for non-linear transient systems in Ansys Twin Builder. These types of ROMs are called Dynamic ROMs; Twin Builder has a Dynamic ROM builder to make the process very simple. You can find more information about Twin Builder and Dynamic ROMs in the Ansys Learning Hub - Systems - Twin Builder.
Ansys customers with active commercial software licenses can access the customer portal and submit support questions. You will need your active account number to register.