79 - creating beam idealizations for an electrical power transmission pylon

7/27/2019 79 - Creating Beam Idealizations for an Electrical Power Transmission Pylon

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Idealizations

CreatingBeamIdealizationsforanElectricalPowerTransmissionPylon Exercise

Exercise: Creating Beam Idealizations for an Electrical Power

Transmission Pylon

Objectives

After successfully completing this exercise, you will be able to:

Apply beam idealizations to a model. Create beam sections. Create and apply beam orientations.

ScenarioIn this exercise, you will apply beam idealizations to an electrical power transmission

pylon. You will apply three different beam idealizations in different orientations, as shownin the figures below.

Main

Beam2 and

Beam3(different

orientations)

Beam4 and

Beam5(different

orientations)

Beam6


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BeamPylon pylon.prt

Task 1. Start the Mechanica application and begin creating a beam idealization.

1. Click Applications > Mechanica.

2. Click Beam from the Mechanica toolbar.

Task 2. Before creating a beam idealization, create three beam sections.

1. Click More... next to the Beam Section field.

2. Click New... to open the Beam Section Definition dialog box.

3. Type Large in the Name field.

4. Type Standard American Steel Angle 4 in. x 4 in. x 1/4 in. in the Descriptionfield.

5. Select L-Section from the Type drop-down menu.6. Type the following values in the Beam Section Definition dialog box:

Parameter Value

b 101.6

t 6.4

di 95.2

tw 6.4

7. The dialog box should now appear, as shown. Click OK to close the Beam SectionDefinition dialog box and complete the beam section.


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9. Type Medium in the Name field.

10. Type Standard American Steel Angle 3 in. x 3 in. x 3/16 in. in theDescription field.

11. Select L-Section from the Type drop-down menu.

12. Type the following values in the Beam Section Definition dialog box:

Parameter Value

b 76.2

t 4.8

di 71.4


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tw 4.8

13. The dialog box should now appear as shown. Click OK to close the Beam SectionDefinition dialog box and complete the beam section.


15. Type Small in the Name field.

16. Type Standard American Steel Angle 2 in. x 2 in. x 1/8 in. in the Descriptionfield.

17. Select L-Section from the Type drop-down menu.

18. Type the following values in the Beam Section Definition dialog box:


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Parameter Value

b50.8 50.8

t 3.2

di 47.6

tw 3.2

19. The dialog box should now appear, as shown. Click OK to close the Beam SectionDefinition dialog box and complete the beam section.


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20. The Beam Sections dialog box should now appear, as shown. Click Close to close

the dialog box.


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Task 3. Create beam orientations.

1. Click More... next to the Beam Orientation field.

2. Click New to open the Beam Orientation Definition dialog box.

3. Type 090_angle in the Name field.

4. Type 90 in the Orientation Angle field.

5. The dialog box should now appear, as shown. Click OK to finish creating the BeamOrientation and close the dialog box.


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9. Click OK to finish creating the Beam Orientation and close the dialog box.10. Click New to open the Beam Orientation Definition dialog box.



13. Click OK to finish creating the beam orientation and close the dialog box.




17. Click OK.

18. The Beam Orientation dialog box should now appear, as shown. Click Close to

finish creating the beam orientatios and close the dialog box.


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Task 4. Create the main beam idealization using the Large beam section and an

appropriate orientation.

1. Type Main in the Name field.

2. Select the four curves shown in the figure as references for the main beam

idealization. Be sure all of the yellow arrows are pointing upwards, as shown.

3. Select STEEL from the Material field drop-down menu.

4. Select Large from the Beam Section drop-down menu if necessary.

5. Select 135_angle from the Beam Orientation drop-down menu.

6. The dialog box should now appear, as shown. Click OK to complete the definition of

the main beam idealization.


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7. The model should now appear, as shown.

The 135_angle Beam Orientation was applied to facilitate this orientation.For enhanced understanding, consider temporarily replacing the 135_angle

Beam Orientation with (None) and note the effects. Be sure the orientationof each beam appears, as shown.


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8. Click + next to Idealizations in the model tree to expand the section.

9. Click + next to Beams in the model tree to expand the section.

10. Right-click the Main beam idealization and select Suppress, as shown.

11. Click Yes to suppress the beam idealization.

The beam idealization has been suppressed temporarily for clarity while youcreate the other beam idealization.

Task 5. Create the Beam2 beam idealization using the Medium beam section and anappropriate orientation.

To help reduce the chance of an incorrect selection, the references for all ofthe remaining beam idealizations in this exercise have been added to layers.

You will select the references using layers instead of selecting themindividually.

1.1. Click Beam from the Mechanica toolbar.


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2.2. Verify that the Name field contains the default name Beam2.3.3. Click Layers from the main toolbar.4.4. Right-click the B2 layer and select Select Items.5.5. The model should appear, as shown.

6.7.6. Select STEEL from the Material field drop-down menu.8.7. Select Medium from the Beam Section drop-down menu.9.8. Select 090_angle from the Beam Orientation drop-down menu.10. 9. The dialog box should appear, as shown. Click OK to complete the

definition of the B2 beam idealization.


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11.

12. 10. The model should now appear, as shown.13. 11. Click Layers from the main toolbar to switch back to the model tree.14. 12. Click + next to Beams in the model tree to expand the section.15. 13. Right-click the Beam2 beam idealization and select Suppress. Click Yes

to suppress the Beam Idealization.


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16.

Task 6. Create the Beam3 beam idealization using the Medium beam section and anappropriate orientation.


2. Verify that the Name field contains the default name Beam3.

3. Click Layers from the main toolbar.

4. Right-click the B3 layer and select Select Items.

5. The model should appear, as shown.


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7. Select Medium from the Beam Section drop-down menu.


9. The dialog box should appear, as shown. Click OK to complete the definition of theB3 beam idealization.


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11. Click Layers from the main toolbar to switch back to the model tree.


13. Right-click the Beam3 beam idealization and select Suppress. Click Yes to

suppress the beam idealization.


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1. Task 7. Create the Beam4 beam idealization using the Small beam section and anappropriate orientation.







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7. Select Small from the Beam Section drop-down menu.


9. The dialog box should appear, as shown. Click OK to complete the definition of the

B4 beam idealization.


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Task 8. Create the Beam5 beam idealization using the Small beam section and anappropriate orientation.







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1. Task 9. Create the Beam6 beam idealization using the Small beam section and anappropriate orientation.







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1. Task 10. Resume all of the suppressed beam idealizations, save the model, and eraseit from memory.

1. Click Edit > Resume > Resume All. Click anywhere on the background of the

graphics window to de-select all of the beam references you just resumed. Themodel should now appear, as shown.

2. Return to the Standard Pro/ENGINEER mode by clicking Applications > Standard.

3. Click Save from the main toolbar and click OK to save the model.

4. Click File > Erase > Current > Yes to erase the model from memory.


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This completes the exercise.

79 - creating beam idealizations for an electrical power transmission pylon

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