Question about lamb wave dispersion example 回答済み

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  Chloe Allison

  2021年02月01日 11:22

  Hi Jinny,

  In the input file (.flxinp) you can output mode shapes that can get you xyz velocities at specific frequencies, you can then output the raw data to a .mat file or a .csv file, view the mode shape in Post Processor or plot it in Review.

  Here is a couple of things that will help you:

  Calculating Mode Shape

  To extract a mode shape you need to use the shap command (see command ref for more details).

  c Set up mode shape
  shap
         freq 1e6      /* Frequency to extract mode shape at
         data xvel     /* Calculate xyz velocity data arrays at chosen frequency
         data yvel
         data zvel
         end 

  Output to Post Processor

  At the end of the .flxinp you can output to .flxdato file to view in Post Processor:

  data
         out shap/all
         end

  Here is a video on how to view the mode shape in PP.

  Output to CSV

  At the end of the .flxinp you can also output real and imag data to csv file:

  data
      cddo shap/xvel:r1 'real_xvel.csv' * * * * 
      cddo shap/xvel:i1 'imag_xvel.csv' * * * * 
      end

  If you would rather have the magnitude and phase data, you need to covert real and imag to mag and phase first, then output it:

  data
      polr shap/xvel:r1 shap/xvel:i1 to shap/xvel:m1 shap/xvel:p1
      cddo shap/xvel:m1 'mag_xvel.csv'  * * * *  
      cddo shap/xvel:p1 'phase_xvel.csv'  * * * * 
      end

  Plot in Review

  Here is a script that plots the mode shape in Review.

  I hope this helps!

  Best Regards,
  Chloe

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