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HG-3010: Working with Complex Plots

HG-3010: Working with Complex Plots

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HG-3010: Working with Complex Plots

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In this tutorial you will learn how to:

•Create complex plots from a data file
•Add and edit complex data curves by using mathematical functions

Tools

The Build Plots panel can be accessed in one of the following ways:

•Click the Build Plots icon build_plots from the toolbar

Or

•From the menu bar select Curves > Build Plots

The Build Plots panel constructs multiple curves and plots from a single data file.  Curves can be overlaid in a single window or each curve can be assigned to a new window.  Individual curves are edited using the Define Curves panel.

build_plots_complexplot

The Define Curves panel can be accessed in one of the following ways:

•Click the Define Curves panel button curvesCreate-24 from the toolbar

Or

•From the menu bar select Curves > Define Curves

Existing curves can be edited individually and new curves can be added to the current plot using the Define Curves panel.  The Define Curves panel also provides access to the program's curve calculator.

definecurvespanel_complex

Exercise: Plot Complex Data and Apply Math Functions

Step 1:  Build a complex data curve from a data file.

1.From the menu bar select File > New > Session to clear the contents of the session.
2.From the plot type menu, select Complex Plot chartComplex-24.
3.Enter the Build Plots panel build_plots.
4.Use the file browser button to open the control_arm_sol111.pch file, located in the plotting folder.
5.Leave the X type: set to Frequency [hz].
6.In the Y type: column, select Subcase 1 Displacements.
7.In the Y Request: column, select Point id 2086.
8.In the Y Component: column, select X-Rot.
9.Click Apply to create the complex curves.

hg3010_graph1

Step 2: Apply the Inverse Fast Fourier Transform (ifft) math function to the complex data curve.

1.Change the current window layout of page 1 to a two-window layout pageLayout2Vertical-24.
2.Activate the window on the right side.

New plot windows are set to the xy plot type by default.

3.Set the plot type for the window on the right side to XY Plot.
4.Enter the Define Curves panel curvesCreate-24.
5.Add a new XY plot curve named Curve 1.
6.Rename Curve 1 to ifft_curve.
7.Under Source, select Math.
8.In the x: field, enter p1w1c1.x.
9.In the y: field, enter ifft(p1w1c1.ym,p1w1c1.yp).
10.Click Apply to create the XY data curve.

hg3010_graph2

Step 3:  Create a complex data curve of frequency versus displacement for Subcase two, node 2086, x-rotation.

1.Activate window 1 (the left window).
2.Enter the Build Plots panel build_plots.
3.In the Y type: column, select Subcase 2 Displacements.
4.In the Y Request: column, select Point id 2086.
5.In the Y Component: column, select X-Rot.
6.Click Apply to create the complex curves.

hg3010_step3_graph

Step 4:  Subtract the Subcase two curve from the Subcase one curve.

1.Change the current window layout for page 1 to a three-window layout, pageLayout3SplitRight-24.
2.Make the new, blank plot window active.
3.From the plot type menu, select Complex Plot.
4.Enter the Define Curves panel.
5.Click Add P/M to create a new complex curve.
6.Rename Curve 1 to sub_disp.
7.Under Source, select Math.
8.In the x: field, enter p1w1c1.x.
9.In the yp: field, enter p1w1c2.yp - p1w1c1.yp.
10.In the ym: field, enter p1w1c2.ym - p1w1c1.ym.
11.Click Apply to create the complex curve.

hg3010_graph3_new

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