Create file .op2

Hi . I saw a file "beam_modal.op2" in tutorial. I don't know how it was created ? Please help me

What tutorial are you referencing and where did you find it?
I use AcuSolve_2019_Tutorial_Manual.pdf and found "beam_modal.op2" in PFSI simulation.

The .op2 file is likely from Altair OptiStruct. The P-FSI approach requires mass-normalized output from a frequency/modal analysis from a structural analysis tool. The structural model side is not covered in the AcuSolve tutorial - but that is what is required.
Thanks for your response. I'm trying to do a fsi problem, "the effect of sloshing of liquid to the wall of a xitec tank". I have created a structural model. Can you review and give me some advice?. Thank you very much.
Thanks for your response. I'm trying to do a fsi problem, "the effect of sloshing of liquid to the wall of a xitec tank". I have created a structural model. Can you review and give me some advice?. Thank you very much.
Sorry - I'm not a user on the structural side. There should be one or two OptiStruct tutorials that talk about P-FSI and/or DC-FSI with AcuSolve - but I don't even know where the OS tutorials are...

Sorry - I'm not a user on the structural side. There should be one or two OptiStruct tutorials that talk about P-FSI and/or DC-FSI with AcuSolve - but I don't even know where the OS tutorials are...
No problem, thank you for your response.
What tutorial are you referencing and where did you find it?