Solving and Examining Results

During a solve, the algorithm will print the results of each iteration to the MATLAB command window, but the GUI will not update. When the selectASET algorithm is complete, the main selectASET form will look something like Figure 3, with the results displayed on the right side of the form. The top-right plot shows how the error varies as DOF are removed, in this case starting with 251 DOF and down-selecting to 50 DOF. Note that the shape of the plot may be very different depending on the solver options. The blue square in the plot shows which TAM is currently selected, and the error of the selected TAM is displayed in the table on the bottom right. For this case, the scalar error was calculated using the absolute maximum value of the error matrix while rescaling modes at each iteration (see the Solver Options region).

Figure 3. Sample selectASET GUI after solving.

Several different results metrics, such as cross- and pseudo-orthogonality, frequency comparisons, and MAC comparisons, are available directly from the selectASET form in the Results menu; a few sample screenshots are shown in Figure 4. The Export menu also allows the user to export Nastran ASET cards or an Excel-compatible XML file for the currently selected DOF set (Figure 5) to document a selected DOF set. Note that all results in Figure 4 and Figure 5 reflect the 50 DOF set that is currently selected (blue box in the plot and results in the table in Figure 3).

Figure 4. Sample outputs for the currently selected TAM from the Results menu.

 

Figure 5. Sample outputs from an exported Excel-compatible XML file.

One of the benefits of the selectASET algorithm is that it provides feedback on the accuracy of the final DOF set as well as every intermediate TAM through the iterative process, shown by the blue line in the top-right plot of Figure 3. The user can select one of the intermediate TAMs and review results within the selectASET environment by using the Select TAM button. When clicked, the cursor will turn into crosshairs and the user can click anywhere in the results plot to select an intermediate TAM. Once selected, the location of the blue box in the plot and the results in the bottom-right table will update, and any results generated from the Results or Export menu will reflect the currently selected TAM. The two magnification buttons to the right of the plot can be used to zoom in or out.

Figure 6. selectASET GUI after selecting an intermediate TAM.