Controlling Frequency-Domain Animations
Displaying Specific Modes or Frequencies of Frequency-Domain Animations
You can select to view a specific mode or frequency in your frequency-domain animation.
To select to view a mode or frequency:
1. From the
Dashboard, select
Mode Shape Animation.
2. Set the pull-down menu to either:
■Mode and enter the number of the mode to be viewed. You can also use the +/- buttons to move through the modes.
■Frequency and enter the frequency of the mode to be viewed.
If you specify the frequency, Adams PostProcessor uses the mode closest to the specified frequency. If you specify neither the mode nor the frequency, Adams View deforms the model using the first mode.
Note: | To view the modes in the eigensolution to see which you should use, see Viewing Eigenvalues. |
Controlling the Number of Frames Per Cycle
For a linear mode-shape animation, you can control the number of frames per cycle. Adams PostProcessor performs the interpolation between the frames using trigonometric functions; therefore, the frames tend to be segregated at the maximum deformation in the positive and negative directions.
Note: | A full cycle goes from undeformed, to maximum positive displacement, back to undeformed, then to maximum displacement in the negative direction, and finally back to undeformed. |
To set the number of frames per cycle:
1. From the dashboard, select Mode Shape Animation.
2. In the Frames Per Cycles text box, enter the number of frames to be displayed for each cycle.
Setting Linear Mode-Shape Display for Frequency-Domain Animations
■Set scale factor - You can specify the amount parts translate or rotate from their undeformed position. If you do not specify a scale factor, Adams PostProcessor translates parts no more than 20 percent of model size and 20 degrees.
■Show time decay - You can specify whether the amplitudes of the deformations are to remain constant or decay due to the damping factor calculated in the eigensolution.
■Superimpose the modes - You can select to show each mode superimposed on the other modes.
■Show undeformed model - You can set whether Adams PostProcessor displays the undeformed model with the deformed shape superimposed on top of it. If you select to show the undeformed, you can select a color for the undeformed model. If you do not specify a color, Adams PostProcessor displays the undeformed model using the same color as the deformed mode.
To set the frequency-domain control display:
1. From the dashboard, select Mode Shape Animation.
2. If desired, select any of the options shown in the table below.
Frequency-Domain Animation Display Options
To: | Do the following: |
|---|
Set the amount parts translate or rotate from their undeformed position | Enter the scale in the Scale Factor text box. |
Show time decay | Select Show time decay. |
Superimpose modes | Select Superimpose. |
Show undeformed mode | Select Show undeformed and then, in the Color text box, enter a color. |
Viewing Eigenvalues for Frequency-Domain Animations
You can display information about all an eigensolution's predicted eigenvalues in the
Information Window for
Frequency-domain animations. Once you display the information in the Information window, you can save it to a file.
The information includes:
■Mode number - Sequential number of the mode that the eigensolution predicted.
■Frequency - Natural frequency corresponding to the mode.
■Damping - Damping ratio for the mode (the log decrement is another way to represent this quantity).
■Eigenvalues - List the real and imaginary part of the eigenvalue.
To view eigenvalues:
1. From the
Dashboard, select
Mode Shape Animation, and then select
Table of Eigenvalues.
The Information window appears.
2. After viewing the information, select Close.