The Simplify command removes constant radius fillets, equal distance chamfers, and holes. It provides tools for selecting the features based on type and size.
Show me how to simplify a model
Model simplification is typically used to prepare models for simulation analysis. Many CAD models are too complicated for CAE applications like FEA and CFD. Small features can cause a significant increase in analysis time. CAE analysts typically remove these details before meshing the model. While most small features can be removed, some features are important for the analysis. The Simplify command checks the model for features and provides tools for removing them based on type and size.
Simplify does not analyze the model, so it does not recognize geometry that does not have a feature in the browser. For example, simplify finds a hole feature, but not a cylindrical cut. Use the Find Features
command to convert model geometry to features.
Model simplification results
The wizard can take three actions on the selected features:
Delete Removes the selected features and extends the adjacent faces to close the gaps. If the faces cannot be extended for a particular feature, then that feature is not removed.
Select Retains the selection set after you click OK. You can quickly select a group of features to edit with modeling commands.
Create Favorites Creates a Simplify Favorites Folder in the browser with the feature definitions. You can click the folder in the browser to select all model features that meet the criteria.
Feature types in the Simplify dialog box
The Simplify dialog box contains a check box for each feature type, and sliders to set the range of sizes. You can deselect feature types, and filter them by size.
NoteSimplify does not analyze the model. It retrieves only features that are identified in the browser. Run the Find Features command to identify features in imported models.
In addition to feature type, you can filter for fillet geometry, and counterbores on holes.
- Depth of Holes
- Diameter of Holes
- Depth of Counterbores
- Diameter of Counterbores
The black slider button sets the lower limit, and the red button sets the upper limit. You can drag the slider buttons to change the limits, or click the number and enter a new value. You cannot make the lower limit greater than the upper. As you change the limits, features outside of that range are deselected.
In the images below, the settings filter for concave fillets between 2.4 mm and 5.1 mm radius.
Remove features from a model
Simplify a model
- On the Manage panel, click Simplify. All fillet, chamfer, and hole features are automatically selected.
Simplify does not analyze the model. Use the Find Features
command to convert geometry into features.
- Deselect feature types to remove them from the selection set.
- Change the size limits to reduce the selection set. You can drag the black and red slider buttons, or click a number to enter a value.
- Select an Action method
- Delete Removes the selected features and extends the adjacent faces to close the gaps. If the faces cannot be extended for a particular feature, then that feature is not removed.
- Select Retains the selection set after you click OK. You can select a group of features quickly to edit with modeling commands.
- Create Favorites Creates a Simplify Favorites folder in the browser with the feature definitions. You can click the folder in the browser to select all model features that meet the criteria.
- Right-click in the graphics window, and select OK.
NoteYou can click anywhere on the background of the Simplify dialog box to drag it to a new location.
Large feature limitations
When a feature is deleted, the adjacent faces are extended to close the gap. If the feature is large enough to remove a model face, the Simplify command cannot repair the body. In these cases, the features are not deleted.
In the example below, the Simplify command found the fillet feature, but does not remove it because the model requires a new top face.