Thank you Erik,
Sorry for that, I didn't know that and I will open new discussion it for future questions.
for this problem, I exactly needs the command that goes to Modal and then goes to Random vibration. I already checked the help, but I am not sure which command should be used for pressure PSD load on the surfaces in Workbench.
I dont know how to find the VM203 in the apdl verification manual.
Thank you!
Ash
You are navigating away from the AIS Discovery experience