The PreTest utility's Load tab allows you to select and load the normal modes results
files and filter modes and also select nodes for PreTest and Driving Point Residue
calculations.
Modes Filter
Using the Modes Filter tab, you can select modes from selected subcases, defining a
frequency range, or by filtering the frequency values manually. Figure 1. PreTest - Load Tab - Modes Filter
Node Selection
Use the Nodes Selection tab to automatically identify the nodes or manually select nodes
from the model, for MAC and DPR calculation. You can also create plotel between the chosen
nodes.
Figure 2. PreTest - Load Tab - Nodes Selection
Element Selection
Select Mass and/or Plotel and enter a
length filter to identify element configurations.
You can also select 1D, 2D, and
3D elements by activating those check boxes.
Automatic
Automatically identifies the nodes from the model for MAC and DPR calculations,
based on the advanced selections satisfying user-defined off-diagonal threshold
criteria or number of nodes.
Off-Diag Threshold
User-specified target value for off-diagonal MAC value to be satisfied with
automatic identification of nodes. The number of nodes identified automatically
should result in an off-diagonal MAC value less than or equal to the specified
threshold value.
No. of Nodes
Maximum number of nodes (sensor locations) to be identified automatically with
optimal placement on the model, resulting in the minimum possible MAC.
Advanced Selections
Percentage of max disp.
Identify the nodes (portions) on the model having a displacement equal
to or more than the specified value.
Min. Distance
Minimum distance criteria for the identification of the nodes.
Manual
Manually select the nodes on the model. You can create the plotels between selected
nodes.
MAC and DPR Calculation
Modal Assurance Criteria (MAC)
Calculates the MAC for the selected nodes.
Driving Point Residue (DPR)
Calculates the driving point residues for the selected nodes.
