Sensitivity Analysis

Use Sensitivity Analysis to study modal contribution.

The standard post-processing in SnRD offers the functionality to generate time domain displacement plots of each of the node-pairs of all the E-Lines that are present in the model. The purpose of the Sensitivity Analysis is to study the root cause of rattle and/or squeak at each E-Line.

Two main diagnosis functionalities are enabled in SnRD sensitivity analysis step:
  • Determination of Relative Modal Contribution to squeak and rattle of complete E-Lines and as well as at specific points on each E-Line.
  • Capability to check the effect of changing the percentage of modal contribution on the squeak and rattle performance.
  1. Select the Sensitivity Analysis tab in the tool.
    The Sensitivity Analysis tab opens.
  2. Select the required result file from the Result File list.
  3. Select the subcase from the Subcase name list.
  4. Browse and select relevant H3D file for Modal Results File (.h3d).
  5. Select required E-Line from E-Lines list.
  6. Select a point on the E-Line or checkbox to select the complete Line for Select Pair option.
  7. Select direction from Select Direction list.
  8. Optional: Enable the Display Excitation load checkbox to plot the excitation load.
  9. Optional: Enable the Squeak 2D Plot checkbox to plot the relative displacement in the XY plane (Contact Plane).
  10. Click Load Time History.
    Loading time history and relative displacement plots for the selected E-Line and the pair are generated and plotted.