×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Fourier Transformation in Nastran

Fourier Transformation in Nastran

Fourier Transformation in Nastran

(OP)
Who can guide me through a Fourier Transformation in Patran/Nastran? To run a modal transient analysis I need to know which modes are dominantly participating.

Thank you.

RE: Fourier Transformation in Nastran

First, run a normal modes analysis.  Then inspect the effective modal mass values in the output file.  NE/Nastran outputs these values.  I am uncertain whether other FEA software give these values.  

You should probably include enough modes in the modal transient analysis to account for, say, at least 90% of the mass.

Also, consider the frequency content of the excitation function with respect to the modal frequencies.

Tom Irvine
www.vibrationdata.com

RE: Fourier Transformation in Nastran

Hello.
Does anyone knows about the use of orthotropic material in/for FEA in Generative structural analysis CatiaV5... It looks like Catia is allergic to orthotropic material data...

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!


Resources