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14.5 Release

Workshop 8C

Applying Initial Rotational Velocity

ANSYS MechanicalLinear and Nonlinear Dynamics

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GoalsThe objective of this workshop is to illustrate the process of applying

initial angular velocity to a wirebond using steps.

Initial angular velocity = 15 rad/sec.

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Project Schematic

Open the Project page.

From the Units menu verify:

Project units are set to Metric (kg, m, s, C, A,N, V).

Display Values in Project Units is checked (on).

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. . . Project Schematic

Begin a new Workbench session and, from the

Project page, choose Restore Archive . . . andbrowse to the file W08C_Transient.wbpz and

Open (location provided by instructor).

When prompted, Save using the default name in

the same location as the archive file.

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. . . Project Schematic

1. From the Static Structural system double click

(or RMB > Edit) the Model cell.

2. When Mechanical opens, verify the units are

set to

1. Metric (m, kg, N, s, V, A).

2. Radians

3. Rad/s

1.

2.

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Preprocessing

Since we will be using a remote displacement to apply the angular velocity,

lets define a coordinate system at the origin where the velocity is to beapplied:

3. Highlight the Coordinate System under Model branch in the tree.

4. Select the cylindrical face shown below, RMB > Insert > coordinatesystem.

3.

4.

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In order to apply an initial angular velocity of 15 rad/sec

Initial angular displacement of 0.0015 rad

The first step end time = 0.001 sec.

Initial velocity of (0.0015/0.001) = 15 rad/sec.

. . . Preprocessing

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5. Highlight the Transient Analysis (A5)branch, Analysis Settings, and set up

two load steps as shown

. . . Preprocessing

Make sure that time integration effects are turned

off for the first step.

on for the second step.

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6. Highlight the Transient Analysis (A5) branch.

7. Select the face as shown> RMB> Insert> Remote Displacement

8. Under the details of Remote Displacement > Coordinate system> pickthe previously defined coordinate system

. . . Preprocessing

7.

8.

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9. In the details of the Remote Displacement, fill in the Tabular Dataas follows:

10. At the last cell under RX> RMB> Activate/Deactivate at this step!

. . . Preprocessing

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11. Highlight the Analysis Settings and from the details window changeLarge Deflection from to ON.

12. Add results to solution:

Highlight the solution branch:

From the context menu, choose deformation > Total

Solution

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6. Highlight the Transient Analysis

branch > RMB> Insert>Commands

7. In the commands write

kbc,0

. . .Solution

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14. Solve the model:

Choose solve from the tool bar or RMB Solution branch

and choose Solve.

. . .Solution

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14. Highlight the solution branch> Total Deformation

Postprocessing