Mode Shapes |
 
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Mode Shapes |
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As mentioned already, a Modal Analysis automatically produces graphical output for viewing, in a similar manner to a standard Time Domain Analysis. Unlike a standard analysis however, the modal analysis output does not represent an animation of the dynamic response of a structure. Rather, it contains a set of three-dimensional snapshots of the structure mode shapes. When you actually view the data using the display facility, the mode shapes are displayed in turn. Each display is held on screen for approximately 10 seconds, and then the next mode shape is shown. In this way the data plays like a three-dimensional slide show. The figure below shows a sample mode shape for a catenary riser. The Model View allows you full freedom to examine the model and its mode shapes in three dimensions by zooming, rotating and panning in the usual way.
Sample Mode Shape Display