The deformed model shape for the first vibration mode is plotted (it is a rigid body mode). Advance the plot to the second mode of the blank. Superimpose the undeformed model shape on the deformed model shape. The frequency analysis shows that the blank has a fundamental frequency of 140 Hz, corresponding to a period of 0.00714 s. Figure 1 shows the displaced shape of the second mode. We now know that the shortest step time for the forming analysis is 0.00714 s. |