Risk Assessment

Assess the Squeak and Rattle Risks by viewing the results from the Squeak and Rattle analysis.

In Risk Assessment, the results from three types of events are reviewed- Dynamic, Static, and Thermal. Evaluation of Rattle and Squeak E-lines are done separately.

Rattle Evaluation

The automatic assessment allows the understanding of the rattle phenomena using the following:
Relative Displacement (X, Y, Z, MAG)
Relative movement between the two components along the Evaluation lines. This is available in all directions:
  • Z defines the Gap Direction
  • X-Y defines the Contact Plane
Dynamic Tolerance
Upfront Risk or No Risk where the relative displacement is compared to the actual Gap and tolerance values.
Contact Risk Index
If there are risks for the rattle, these can be further quantified using CRI based on the stiffness of the interface. A soft interface has a lower risk for an audible Rattle than a hard interface.
Read more about Rattle Evaluation.
Note: Make sure the Gap Direction for all E-lines is properly defined to review Dynamic Tolerance.

Squeak Evaluation

The automatic assessment allows the understanding of the squeak phenomena using the following:
Max Principal P2P
The largest magnitude in the MAX principal direction of the movement in the contact plane. To determine possible risk this value can be compared to the (IR)-1 from stick-slip testing.
Min Principal P2P
The largest magnitude in the MIN principal direction of the movement in the contact plane.

Read more about Squeak Evaluation.

Perform Risk Assessment

To perform risk assessment:
  1. Select a model file, if a model is not already loaded.
  2. Select a result file and which loadcase to evaluate.
    • For a Static Event load- .h3d file.
    • For a Dynamic Event load- .pch file.
  3. Select multiple results at a time and control how these are visualized using .
  4. Click Plot to visualize results.
    A summary of all E-lines in the model for all result files and loadcases loaded in session are available for easy comparison and Report creation.
    Figure 1.
  5. Optional: Review the summary of all E-lines in the model for the active loadcase and result file by expanding .
    If loading results from additional result files and load cases, then these results will be appended to the Summary Table for easy comparison.
  6. Toggle active load-case to update Bar plot.