Question about velocity input signal 回答済み

3件のコメント

• 正式なコメント

  

  Oliver Mashari

  2019年08月01日 09:20

  Hi Hyunjae,

  So yes Chloe is right you would define the velocity load using BOUN DEFN and NODE like this:

  boun

       defn velocityload vel func 

       node $i2 $i4 $j2 $j2

  This will not change any of your other boundary conditions this will apply a velocity load to this surface. All this is doing is applying your load it's just done within the BOUN command. 

  If you want to capture acoustic pressure at this point $i3 $j3 then you need to use CALC PRES and POUT HIST:

  calc 

       pres acoustic 

  pout 

       hist aprs $i1 $i1 $j3 $j3 

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• 

  Hyunjae Song

  2019年08月05日 04:16 (編集済み 2019年08月05日 04:55)

  Hi. Oliver

  Here is my two questions.

  1. What if I want to use pressure input?

  Is it right that I just use hist and func command like below?

  data hist drv1 * pressure_data.dat
  func hist drv1

  2. I fix my code using your advice but it doesn't work.

  What I only fix is

  defn velocityload vel func 

       node $i2 $i4 $j2 $j2

  Could you tell me what is problem?

  I don't use PZT material.

  Here is my code.

  -------------------------------------------------------

  site
  regn waternl
  regn vacm $i2 $i4 $j1 $j2
  end

  boun
  side xmin absr
  side xmax absr
  side ymin absr
  side ymax absr

  defn volocityload vel func
  node $i2 $i4 $j2 $j2
  end

  % put velocity data

  data hist drv1 * cut_0.dat
  func hist drv1

  calc
  pres aprs
  end

  plod
  pdef pld1 func /* choose driving function and name 'pld1'
  vctr vct1 0. 1. 0. /* choose direction for pressure
  sdf2 pld1 vct1 vacm waternl /* replace with actual matr names
  end

  pout
  hist aprs $i3 $i3 $j3 $j3
  end

  prcs

  -----------------------------------------

  Please help me

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• 

  Oliver Mashari

  2019年08月05日 08:17

  Hi Hyunjae,

  Yes so if you want to use a pressure load the way you have set it up looks fine but if you want to load the same area as the velocity load you will have to add 

  sdf2 pld1 vct1 vacm waternl $i2 $i4 $j2 $j2

  The velocity data is being defined after the velocity load has been defined if you move this code before the BOUN command you should see this work now:

  data hist drv1 * cut_0.dat
  func hist drv1

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