To spin a group of elements to create elements with a user-specified bias:

1.	Select the spin elems subpanel.

2.	Indicate the elements you want to spin:

•	Pick the elements on your model.

•	Click elems and choose from the extended entity selection menu.

HM_Panels_bmp00312

3.	Use the plane and vector collector to specify a plane.

The elements are spun about the normal of the plane.

4.	Select base and select a base point.

HM_Panels_bmp00313

5.	Select angle = and specify an angle through which to spin the elements.

6.	Select on spin = and enter the number of elements you want to generate along the path of the spin.

7.	Click bias style: and select linear, exponential or bellcuve.

8.	Click the data entry field after bias intensity = and enter the desired value.

For more information on the biasing options, refer to the Element Biasing section in the Automatic Mesh Generation chapter of the User’s Manual.

9.	Click spin+.

10.	To generate the elements in the opposite direction, click spin-.

The elements in this illustration were created by using spin +, with a negative biasing value.

HM_Panels_bmp00314

The elements in this illustration were created without element biasing.

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Undo

Select reject immediately after you create the surface and/or mesh or elements. To reinstate the rejected entities, select spin+ or spin- again without changing any of the input data. The input nodes and/or lines or elements used to create the entities are restored provided that no data is selected after the surface and/or mesh or elements are created.

Comments

You can use a line segment.

The order in which the nodes are selected determines the connectivity of the mesh generated.

When one-dimensional elements are spun, two-dimensional elements are generated. When two-dimensional elements are spun, three-dimensional elements are generated. The spin operator ignores three-dimensional elements.