Activity 1: Setup a new modal frequencies analysis

In this activity you create a new study, Study 1 - Modal Frequencies, to determine the frequency (musical pitch) of the first fundamental vibration mode of a tuning fork. To set up the study, you

• Set the number of modes
• Define the mesh size
• Select the desired units system
• Check that the model material is properly assigned. By default, the simulation study material is the same as the material defined in the Design workspace.

Browser when model is first imported (left). Browser after creating a new modal frequencies study (right).

Prerequisites

• Fusion is started.
• Data file location: Samples > Basic Training > 11-Simulation > Tuning Fork-A4.

Steps

1. Open the starting shape model, Tuning Fork-A4, in the Z up direction from the Basic Training folder in the Data Panel.

   1. If the Data Panel is not currently shown, click Show Data Panel at the top of the screen.
   2. The top level (home view) of the Data Panel is divided into two subsections: ALL PROJECTS and SAMPLES. Scroll down until you reach SAMPLES.
   3. Double-click the Basic Training folder to open it.
   4. Double-click the 11 - Simulation folder to open it.
   5. Double-click the Tuning Fork-A4 model to open it in the canvas.
   
   
   Note: The sample model is read-only, so you must save a copy of it to a personal project

2. Identify a personal project in which to save the starting shape models.

   1. Click File > Save as.
   2. Enter a name, such as Tuning Fork - A4, in the name field.
   3. Expand the arrow button next to the Location field.
   4. Locate and click on an existing project, or click New Project to start a new project.

3. Identify or create a folder in which to save the starting shape models.

   1. Double-click on a folder in the project to select it, or create a new folder.
   2. To create a new folder, click New Folder.
   3. Type a name, such as Tuning Fork - A4 for the folder.
   4. Press Enter.
   5. Double-click the folder to make it the current file saving location.
   6. Click Save

4. Create a new Modal Frequencies simulation study.

   1. Click on the Change Workspace drop-down menu at the top left end of the toolbar and select Simulation.
      
      
   2. In the New Studies dialog box, select Modal Frequencies.

5. Set the Number of Modes to 12 and the mesh size to 1.2 mm.

   1. In the upper right corner of the large thumbnail image, click the Settings icon to access the Settings dialog.
      
      
      
      The General settings appear initially.
   2. In the General settings, type 12 in the input field below the activated Number of Modes.
   3. Select Mesh from the left frame of the dialog to display the mesh settings.
   4. Click Absolute Size and type 1.2 mm in the input field.
   5. Click Back to apply the changes.
   6. In the New Study dialog, click Create Study to create the study and close the dialog.

6. Change the default units system to Metric (SI).

   1. In the Browser, hover over Units: Custom then click Edit.
   2. In the Units Settings dialog, choose Metric (SI) from the Default Unit Set drop-down list.
   3. Click OK to accept the change and close the dialog.

7. Verify that the tuning fork material is Stainless Steel AISI 304.

   1. Click (Simulation workspace > Setup tab > Materials panel > Study Materials) to open the Study Materials dialog.
   2. In the Study Materials dialog, verify that the value in the Study Materials column is defined as follows:
      
      
      • A4 Tuning Fork (440 Hz): (Same as Model) or Stainless Steel AISI 304.
      If this is not the case, select the correct material from the drop-down list.
   3. Click OK to close the Study Materials dialog.

Activity 1 summary

In this activity, created a modal frequency simulation study to determine the frequency of the first fundamental vibration mode of an unmodified tuning fork. To define the study parameters you

• Set the number of modes
• Defined the mesh size
• Selected the desired units system
• Checked that the model material was properly assigned.