Buckling pigtra

[chikko04]

Hi, guys, I'm still here asking for help with Patran. I'm a student, so I'm still learning and that such software makes us use it to the segregated member without explaining.
the new exercise is the study of the buckilng phenomenon on a square plate of sizes 1x1 m and thickness 0.001m of aluminum, rested and hinged on the 4 sides loaded on one of them with a distributed load so that the total is 1n.
Now putting these 3d constraints is one of my first problems.
I get to impose then:
for long sides x: t2=0,t3=0,r2=0,r3=0
for long sides y: t1=0,t3=0,r1=0,r3=0
in advance that my problem comes from the fact that I have 3 sizes.
the mesh is a 10x10
for the load I use the function "distribuited load" but I did not even find online if (as I suppose) the value to be inserted is the total load or I must insert the fractional load according to the nodes.
After that (having set as isotropic and aluminum property and as a shell structure) I choose the solutor 105.
at this point, as from the theory and videos on you tube I expect of the "modes" of vibration as output, while instead I receive only a static analysis, which returns me deformation nothing (of course add seen the constraints).
Now someone can tell me, if and where am I wrong and why?
Thank you for your patience.

 

[JackJack]

I go to memory because it's been several years.
I think you forgot to tell nastran that you want the proper ways to vibrate out and not static analysis. . .

ps: aeronautical engineering?

 

[chikko04]

I tried everything in subcases, but I can't find the option. However, it is aerospace.

 

[JackJack]

then perhaps in the display of the outputs.
I leave the word to someone more experienced than I am

 

[chikko04]

There's something wrong, reading in f06 gives me error 4683. I searched a little online, says to add a static subcase... this 2014 version from too many, too many problems. neither the online tutorials that follow step by step come out.

 

[chikko04]

I answer myself: I don't know why, but after a nice restart of the pc, reinstalled everything now works. I obviously changed the constraints (which I did yesterday too) but now it goes!