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Universal_Plot value not matching with operand value

  • November 29, 2022
  • 1 reply
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NehaD

Dear Support team,

 

Can you please assist with the below error?

 

I am trying to plot RAID operand value vs Y-Filed angle (-1 to +1degree). But the value in Universal Plot and Merit Function Editor does not match.

Could you please have a look at the attached files and let me know the correct setting for the universal plot.

ImageDisplay?na=4669847000000008002&nmsgId=1669610196897110001&f=1.png&mode=inline&cid=image017.png@01D90013.8E545390&

 

Can you help to take a look at it and advise?

Thanks in Advance!

Best answer by MichaelH

Hi Neha,

If you look at the Dependent Variable RAID, you can see that you are asking for Hy=1, so you will only get the positive values for the RAID operand.  Even when the Y Field 2 is -1.0, that Hy=1 will treat this as a +1.0.

You can see that the Y values are symmetric about 0 and the Y values for -0.5 & -1.0 match 0.5 & 1.0.  Since the RAID operand at Surface 5 is non-symmetric, you will have to use 2 Universal Plots, one that has Hy=-1.0 and Y Field ranging from -1.0 to 0 & a second one that Hy=+1.0 and Y Field ranging from 0 to +1.0.

Another option would be to simply use a ZPL macro to get these values and plot them (if needed).  This would allow you to directly get the Hy value for both negative and positive values.  There is a sample ZPL macro called PLOT.zpl which shows how to create a line plot.  You can also use OPEV and OCOD(“RAID”) to easily get the Angle of Incidence in the ZPL.

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MichaelH
Ansys Staff
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  • Ansys Staff
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  • November 29, 2022

Hi Neha,

If you look at the Dependent Variable RAID, you can see that you are asking for Hy=1, so you will only get the positive values for the RAID operand.  Even when the Y Field 2 is -1.0, that Hy=1 will treat this as a +1.0.

You can see that the Y values are symmetric about 0 and the Y values for -0.5 & -1.0 match 0.5 & 1.0.  Since the RAID operand at Surface 5 is non-symmetric, you will have to use 2 Universal Plots, one that has Hy=-1.0 and Y Field ranging from -1.0 to 0 & a second one that Hy=+1.0 and Y Field ranging from 0 to +1.0.

Another option would be to simply use a ZPL macro to get these values and plot them (if needed).  This would allow you to directly get the Hy value for both negative and positive values.  There is a sample ZPL macro called PLOT.zpl which shows how to create a line plot.  You can also use OPEV and OCOD(“RAID”) to easily get the Angle of Incidence in the ZPL.


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