×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Nastran output4 file

Nastran output4 file

RE: Nastran output4 file

You won't be able to use DMAP alters to output stress results to the op4 file. Op4 files may only contain MATRIX data, and the alters in the reference are outputting displacement vectors (i.e. matrix data in columns). Stress data is generated in TABLE format, and tables cannot be output to op4. Both tables and matrices may be output to op2 files, but op2 files are only available in either binary or neutral formats, and the neutral format, although it uses ASCII characters, is not human readable (well most humans anyway). In addition, unless you use native format op2, the data is truncated to 32 bit precision, which takes you back to your 6 or 7 if you are lucky decimal places you already have in the f06 file.

Your best bet is to use the HDF5 output file (define MDLPRM,HDF5,1 in the bulk data). Your STRESS output request data will be written to an HDF5 file (.h5 extension). This file is an open source format defined by the hdf5 group (hdf5.org). On their website you can download a utility called hdf5viewer. This tool will allow you to open and view the .h5 file. Locate the stress output and then export it to a text file (use right click on the dataset). You could also write a tool in Python to read the .h5 file (use pytables to do this).

DG

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close