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3. Preparations in I-DEAS

Start up I-DEAS. You can disregard the console window that shows up in the background.

In the I-DEAS Start window, either find your cunixid in the listbox, or type in your cunixid (your account name, e.g. dd2010) into the textfield immediately below the listbox.

Under the field labeled Application, choose Simulation, and under the field labeld Task, choose Master Modeler

Now click on the file icon next to the textfield labeled Model File Name to open the I-DEAS model template you'll be working with.

Figure 1.27
Click image to enlarge, or click here to open
Find the I-DEAS model files that you have downloaded ( wind-tunnel), click on Open and continue on the previous dialog by clicking OK.

Figure 1.28
Once I-DEAS Master Modeler starts, you will find a box, which serves as the wind tunnel for the simulation. The depth of the box is not important, as the simulation will take place on a 2 dimensional surface.

Figure 1.29
Click image to enlarge, or click here to open
I-DEAS features many applications: Design, Simulation, and Manufacturing among others. We will be using Simulation for the analysis of the wheel. Each application encompasses several tasks, which are usually carried out in order. For our purposes, we will be using only a select number of tasks. Depending on the task, the types and availability of icons changes. Within the task Master Modeler you will find icons that facilitate the generation of a model. We will not be using these icons, as we are importing a model from StudioTools.

There are a number of icons that are available in all tasks, three of which you may find useful:

  • Redraw Screen: When switching from another software, e.g. StudioTools, to I-DEAS, you may find that the visualization frame does not update. Use Redraw Screen to redraw the visualization frame.
  • Wireframe: Display the model as a wireframe
  • Shaded View: Display the shaded model

In terms of navigation, you will be using the keys F1 to pan, F2 to zoom, and F3 to tumble. The controls are somewhat different in their handling from those in StudioTools. To use the navigation tools, press down the appropriate key on the keyboard, and move your mouse to pan, zoom, and tumble.

Figure 1.30
To import the model from StudioTools, select File, then Import
Figure 1.31
Click image to enlarge, or click here to open
In the list of available formats for importing purposes, find the format STEP and hit OK.

Figure 1.32
In the next dialog box, select the small file icon next to the textfield labeled STEP File to Import.

Figure 1.33
Click image to enlarge, or click here to open
Find the file you saved in StudioTools. You will notice that a .stp, as well as a .stp.ICON file are available for each model you have exported. Pick the file with the .stp extension and choose Open.

Figure 1.34
At this point, one of two things may happen. 1. I-DEAS imports the file, or 2. I-DEAS does not.

If you find that nothing happens for a minute or so, I-DEAS will finally return an error in the status frame in the left lower corner of the screen. The error reads Launch timed out. This means that the translator, which imports the STEP file could not be started. If this happens, close I-DEAS, and start it up again. You will need to repeat the prior steps to prepare I-DEAS. The translator should then be able to start.

Figure 1.35
Click image to enlarge, or click here to open
Once I-DEAS starts importing the file, you will notice a dialog on the screen, which interactively reports the status of the process.

Figure 1.36
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Once the importing process has completed successfully, the cross-sectional curve will appear close to the front face of the wind tunnel box. We now proceed with projecting the cross section onto the box, in order to cut it out of the face as an empty space.

Figure 1.37
Click image to enlarge, or click here to open
Select the arrow next to the third icon in the third row, as shown in Figure 1.38.

Figure 1.38
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In the expanded list of icons, select Project
Figure 1.39
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To project a curve onto a surface, first select the cross-sectional curve by clicking the left mouse button while the mouse cursor is close to the curve. Next, click the middle mouse button to signal that you're done with selecting curves to project. If you have more than one curve to project, you would select each curve separately before hitting the middle mouse button.

Figure 1.40
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Next, select the surface onto which the curves are projected. Move your mouse over the front face of the box until it is highlighted as shown in Figure 1.41, and select it by hitting the left mouse button. Hit the middle mouse button to signal that you're done selecting surfaces.

Figure 1.41
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In the upcoming dialog you will need to change two settings ( IMPORTANT): 1. change the method of projection from Projection Vector to Normal to Surface, and 2. change the Output Type from Curves to Edges. Finally, click OK
Figure 1.42
Click OK on the upcoming warning regarding moving the wireframe into the wind tunnel template.

Figure 1.43
You have now prepared the model by projecting your motorcycle's cross-section onto one of the faces of the wind tunnel.

Figure 1.44
Click image to enlarge, or click here to open