Creating and Using Deformed Geometry

2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

Creating and using

Deformed Geometry

Hari Subramaniam

2010 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

Creating and using Deformed

Geometry

In this tutorial we will conduct a Static Structural analysis in the Mechanical

application and conduct a Modal analysis on

the deformed geometry

Topics covered in this tutorial

Creating Named Selection

Inserting APDL commands

Using FE Modeler to synthesize a geometry

from a deformed solution



Geometry

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2

1. Open a empty Project file

2. Select the Workbench file Deformed_Geometry



Geometry

3. RMB on the setup (A5) branch of Static Structural and select Edit

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Geometry

The model is already meshed. Pressure and rotational velocity is already applied on the turbine blade



Geometry

Named Selection is created on all the exterior faces.

4. Select the outer face of the turbine blade; RMB and select Create Named Selection.

5. Enter the name as OrgiF01

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5



Geometry

6. Select each of the exterior face of the turbine blade and create a Named Selection similar to step 4 and 5

A total of 11 Named Selections are created as shown in the figure below. This step will ensure that the deformed geometry will have the same number

of faces and the same topology.

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Geometry

7. Select Static Structural (A5) and then select Insert Commands

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Geometry

8. cmwrite command is included to store all the named selections since the rst file will not contain this information

All the components will be stored in allcomp.cmp file

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Geometry

9. Select Solution; RMB and select Solve to solve the model

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Geometry

10. In the project page; drag and drop Mechanical APDL onto to the Solution (A6) branch of Static Structural

11. Drag and drop Finite Element Modeler onto the Analysis (B2) branch of Mechanical APDL

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Geometry

12. RMB on Solution (A6) branch of Static Structural and select Update

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Geometry

13. Select Analysis (B2) branch of Mechanical APDL; RMB and select Add Input File Browse

14. Select the file defgeom.inp

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Contents of defgeom.inp File

Modifies the coordinates of the nodes based on

current displacement

Creates a cdb file which will be read by Finite Element Modeler

Creates surface elements surf154 on the faces of the all the components named ORIGF

Reads the results from the last loadstep

Reads all the components from allcomp.cmp file



Geometry

15. Select Analysis (B2) branch of Mechanical APDL; RMB and select Refresh and then Update

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Geometry

16. Drag and Drop Modal Analysis onto Model (C2) branch of Finite Element Modeler.

17. In order to share the geometry from Finite element Modeler; create a link

between the Finite element modeler and Model (D3) branch of the Modal analysis.

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Geometry

18. Select the Model (C2) branch of Finite Element Modeler; RMB and select Edit to open the Modeler

19. In the Finite element Modeler, expand the Components branch to visualize all the Named selections in static structural are converted to components in

FE Modeler

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Geometry

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20. Select Geometry Synthesis from the model tree

21. Select Initial Geometry to create a geometry from the deformed mesh

22. Expand Initial Geometry to visualize the body that is created from the deformed mesh. This body has the same number of faces like the original

geometry

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Geometry

23. Select File and close the Finite Element Modeler

24. In the project page, RMB on the Model (C2) branch of Finite element Modeler and select Update

Now the Engineering Data and Deformed Geometry are transferred to the Modal Analysis

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Geometry

Open the setup (D3) branch of Modal analysis. You can apply appropriate boundary conditions and solve for Natural frequencies and Mode shapes of

the deformed geometry


Additional Step

You have the option of exporting the deformed geometry as a Parasolid file from Finite Element Modeler, which can be imported to other CAD systems

25. Open the Finite Element Modeler (C2)

26. Select Initial Geometry and then select Convert to Parasolid

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Additional Step

27. RMB on Parasolid Geometry and select Export to a Parasolid File to export the deformed geometry.

Additionally you can select Add a Sew Tool to stitch all the surfaces to form a volume and then export the file (discussed in the next slide)

27


Additional Step Sew Tool

26a. RMB on Parasolid Geometry and select Add a Sew Tool

26b. In the details view of Sew , select all the 11 Bodies for the Geometry and change the Tolerance to 0.001

26c. RMB on Sew and select Generate the Parasolid Geometry which create a solid part from the 11 surfaces and then follow Step-27 to export the file

26a

26b

26c

Creating and Using Deformed Geometry

Documents

deformed solution

deformed geometry121

deformed geometry3

deformed geometry6

deformed geometry7

deformed geometry8

deformed geometry9

deformed geometry10