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Plate mode shape subjected to damage

  1. Sep 30, 2015 #1
    Hello Peeps~ I have couple of questions related to vibration and I would really appreciate some help from you experts out there.

    Anyways, say I have a metal plate with mode shapes observed at 100 Hz and 300 Hz as shown in the below figures. If I were to chip(cut) off a small part of the plate(top corner), will the mode shape for both frequencies totally change? or will just the top antinode part("mountain shape") will change? which frequency range (100 Hz or 300 Hz) will be more severly changed in general?

    upload_2015-9-30_16-24-37.png upload_2015-9-30_16-25-3.png

    Figure 1. at 100 Hz Figure 2. at 300 Hz

    This question would of been easy if I had ANSYS but... I wouldn't understand the reasons for the result anyway :(
    Last edited: Sep 30, 2015
  2. jcsd
  3. Oct 5, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Oct 5, 2015 #3
    Ah well~ I'll try and find ANSYS user and ask for help~
  5. Oct 5, 2015 #4


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    Science Advisor
    Gold Member

    There was no way of answering this properly without doing full analysis on a plate with actual dimensions and constraints .

    OP - try using LISA-8 . Excellent and costs nothing .
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