SS-T: 4085 Squeak and Rattle Analysis

Create squeak and rattle analysis in SimSolid and review the status at different points along the model.

Purpose
SimSolid performs meshless structural analysis that works on full featured parts and assemblies, is tolerant of geometric imperfections, and runs in seconds to minutes. In this tutorial, you will do the following:
  • Identify squeak and rattle states between inner panel and plastic trim parts of a car door
Model Description
The following model file is needed for this tutorial:
  • Squeak_Rattle_Analysis.ssp
Figure 1.


The model (.ssp) file has the following specifications:
  • Material is set to Steel
  • Modal analysis and transient dynamic analysis is created

Open Project

  1. Start a new SimSolid session.
  2. On the main window toolbar, click Open Project .
  3. In the Open project file dialog, choose Squeak_Rattle_Analysis.ssp
  4. Click OK.

Review Model

  1. In the Project Tree, expand Transient Dynamics2 analysis.
  2. Expand the Loads&Constraints branch and review the loads.
    Figure 2.
  3. Click results plot and choose Displacement Magnitude.
  4. Click play to view the displacement for the time span.

Switch to Advanced License

Skip this step is you are already using an Advanced License.

  1. From the top menu, go to Settings > License.
  2. In the License Setup window, select Advanced from the Product edition dropdown.

Create Squeak and Rattle Analysis

  1. On the main window toolbar, select > Squeak and Rattle.
    The new analysis appears in the Project Tree.
  2. In the pop-up window, select the transient analysis to link the squeak and rattle analysis with.
  3. Set the gap tolerances for open-close and stick-slip to zero.

Create Sampling Points

  1. On the Analysis Workbench, click (Add/edit).
  2. In the dialog, select the primary and secondary components in the Primary connect tab.
  3. In the modeling window, select the inner panel as the primary part and the plastic trim as the secondary part.
    Note: Any parts between the inner panel and the plastic trim can be selected as primary and secondary parts without impacting the result.
    Figure 3.


  4. Enter 10 for the Gap value, and keep the default Penetration value
  5. Set the Resolution level to High.
  6. Click Find.
  7. Review the sampling points found.
  8. Delete the unnecessary sampling points found at pin locations and keep only those points that can be seen in the image.
  9. Click OK.

Run Analysis

  1. On the Project Tree, open the Analysis Workbench.
  2. Click Solve.

Review Response

  1. On the Analysis Workbench toolbar, click response.
  2. In the dialog, choose the sampling point and set the response type as Final status to review the final states of various points in the selected sampling point set.
    The red points represent squeak and rattle and the green points represent no squeak and rattle.
    Figure 4.


  3. Switch the response to Minimal gap to view the minimal normal gap due to the applied excitation.
  4. Select one of the points in the modeling window to view a plot for relative distance over time.