Combined Loading

SnRD solution allows the analysis of squeak and rattles for static and dynamic load types. Therefore, in the post-processing module, a combined loading module is available to study combination scenarios.

For example, a road load (in load step 1) and thermal load (in load step 2) can be superposed to see the effect on the S&R performance. This calculation is possible live SnRD Post-Processing module without re-rerun of the analysis. In addition, scaling factor can be applied taking advantage of the Linear nature of the Modal Transient solution and Linear Static load cases already ran.

Considering this example, one can choose to apply the effect of thermal expansion on the gaps between the parts while applying the vibration load to the system analyzed. This, results in the calculation of new gap dimensions to assess the rattle phenomena between the parts. In addition, one can also detect if an open gap becomes a touch condition or pretension indication that squeak might happen.
New Nom. Gap = Original Nom. Gap – Rel Disp in Z for LC affecting gap

Figure 1.
A summary of all possible combinations is as indicated below:

Figure 2.