Combined System
A Combined System () can be used in 1D, 2D, and 3D when you want to refer to different coordinate systems in different domains. It can then be used, for example, as a single coordinate system selection in a physics setting, where some material property is defined using different coordinate systems in different domains. Right-click the Combined System node to add any of the following coordinate systems:
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Base Vector System
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Mapped System
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Rotated System (2D and 3D only)
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Cylindrical System (2D and 3D only)
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Spherical System (3D only)
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System from Geometry (3D only)
For each added coordinate system, use the geometric entity selection to define where in the geometry that coordinate system is used.
Settings
Frame
Select with respect to which Frame — Material (the default), Mesh, Geometry, or Spatial — the coordinate system is defined by the above transformations. Note that the actual coordinate names — typically (x, y, z) or (X, Y, Z) in 3D — are displayed for each frame, indicating which frames differ from each other in the current model.
A coordinate system with Frame set to Spatial is orthonormal only in the spatial frame. Similarly, a Material system is orthonormal only in the material frame. Some physics require that coordinate systems used are orthonormal in a particular frame. For example, choose the Material frame if you want to use the coordinate system in a structural mechanics model.
Coordinate names
Under Coordinate names, the default coordinate names appear in the First, Second, and Third columns — x1, x2, and x3. Change these names if desired.