×
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

modelling of contact in harmonic response

modelling of contact in harmonic response

modelling of contact in harmonic response

(OP)
Hi,

I'm modelling a bar in concrete with applyed force on the bar. When I model them seperately, I get response which is OK, that is - when the steel bar is modeled alone the output spectar (frequency-amplitude) looks OK, and when I model only concrete block its response is also OK. However, when I try to model them together nad apply force on bar, the response I get is the one which corresponds to bar. It doesn't 'recognize' concrete. If I use any contac (no separation, bonded, etc.) i always have the same resonse - response of bar to applyed force. Does anybody have experience with modelling of contact?

Best regards!

RE: modelling of contact in harmonic response

I presume that you must be doing a mode superposition analysis. Modal Analysis doesn't support any non linear contacts and hence you will see them as same. The correct method will be to model the Concrete by applying damping and to model the bars as link elements. You can also try doing a full harmonic analysis.

Regards,
Raj
Desserve Engineering

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