Optimizing the Eigenfrequency of the Hood Model (Tosca ANSA® environment)

This optimization task is a standard bead optimization task. The set-up including starting a BEAD_CONTROLLER task, loading the model and definition of design area, objective function, bead height constraint as well as additional optimization settings can be done as described in the example in the Getting Started Manual.

The optimization result looks as follows:

The first eigenvalue is only slightly higher 0.3140 (1.3%) after the controller-based optimization. The eigenvalue will NOT become higher if you change the number of iterations for the controller approach!

This optimization task is a standard bead optimization task. The set-up including starting a BEAD_CONTROLLER task, loading the model and definition of design area, objective function, bead height constraint as well as additional optimization settings can be done as described in the example in the Getting Started Manual.

1. To define maximization of eigenfrequency value as objective function, select in the task manager PRE_PROCESSING | OBJ_FUNC_ITEM_1 | NEW | EIGENFREQUENCY.

2. In the OBJFUNC_TERM item, choose the DYN_FREQ_KREISSEL type to avoid that the modes switch during optimization and select the first five eigenmodes.

The optimization result looks as follows:

Result is a final eigenvalue of 0.3558 (15%), which may even become higher if one lets the optimization continue for more than 20 iterations.