User-Defined Model (UDM)
A User-Defined Model (UDM) is collection of externally defined parts imported into an Ansys EM 3D Modeler or created using a C or Python script. It has the following attributes:
- UDM includes part attributes (like name, color etc) and material assignment
- UDM can also have external coordinate systems and corresponding planes
- UDM parts can be parameterized and manipulated in Ansys Electromagnetics modeler just like any other part

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UDM can either represent Static geometry models or Dynamic links to models of external geometry editors.
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It can be used for supporting CAD integration in WorkBench.
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UDM uses same plugin technology as User Defined Part (UDP)
Related Topics
UDM Compared to User-Defined Primitives
Insert UDM Command on Draw Menu
Library of Models for CAD Integration
Ansys to Ansys Electromagnetics Geometry Transfer
CAD Integration Material Assignment Transfer