Table 1.2: Guidelines for selecting optimal analysis method to use for a Brake Squeal problem
| Analysis Method | Benefits | Costs |
|---|---|---|
| Linear non-prestressed modal | Fast run time No convergence issues Good method for performing parametric studies | Accuracy Does not include pre-stress effects |
| Partial nonlinear perturbed modal | No convergence issues Includes pre-stress effects | Accuracy |
| Full nonlinear perturbed modal | Accurate Includes pre-stress effects | Longer run time Convergence issues |
Table 1.3: Guidelines for Selecting the Optimal Eigensolver (MODOPT) for Obtaining the Brake Squeal solution
| Eigensolver | Benefits | Costs |
|---|---|---|
| QRDAMP | Fast run time An excellent solver for performing parametric studies | Accuracy, as it approximates the unsymmetric stiffness
matrix Not recommended when the number of elements contributing to unsymmetric stiffness matrix exceeds 10 percent of the total number of elements in the model |
| UNSYM | Accuracy, as it uses the full unsymmetric stiffness matrix to solve the problem | Long run time when many modes are extracted |
For further information, see Brake-Squeal (Prestressed Modal) Analysis in the Structural Analysis Guide.