Recent content by cohoman

I normally only plot the translation for this type of result to visualize the displacement if the structure. Patran will display the nodes according to the x,y,z eigenevector results.

Can you upload your Nastran bdf file?

If you want to calculate the normal modes of a 3D FEM in Nastran, you will need to define the density of the material for the elements in your FEM. What are you modeling? Is it made of bar or beam elements, or solid/shell elements?

I don't believe so because the database format is proprietary.

The .db file is a Patran database file. Since it is binary, you won't be able to do anything with it except open it using the Patran software. It does contain geometry, nodes, elements, loads, material, properties, etc. I don't believe there is any way you can read the .db file into FEMAP since...

I entered engineering college back in 1981, and I wasn't even sure what an engineer did (I just took the advice of my high school counselor). I chose aerospace engineering which was a new option from the mechanical engineering department. Aeros took the same classes as the mechanicals, but we...

Can you confirm by looking at the .f06 file that your job ran successfully to completion, and you actually have results in the .h5 file?

Read up on "pin flags" for the CBAR element in the Nastran Quick Reference Guide.

How about uploading your bdf file?

Did you resolve this issue? What was in the .log file?

I my opinion, open positions currently in the commercial aerospace field are in very short supply. With companies like Boeing having layoffs, aerospace suppliers are also being hit with layoffs. It seems the aerospace defense and space fields are not affected much by the commercial aerospace...

Upload your bdf file.

Here's some suggestions: [ol 1] Make sure you have a relatively fine mesh if you want to look at stresses. Based on your dimensions, you may want to use an element edge length of 2 mm or even 1 mm. By default, Patran will plot averaged results for fringe plots (which will miss absolute peak...

What kind of mesh do you have? Is it a shell mesh representing a long test sample with a rectangular section? Or, is it a solid mesh of a circular rod?

I'm assuming you tried running this job from within the Patran application. If you did this, did you see any error messages in Patran when you ran it? Did any files get generated in the same folder as the Patran database you're working with (like, .f04, .log, etc.)? Finally, can you confirm that...