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Viewing the Results
Generating the Modal Force History for the Moving Load
In the previous stage the passage of the train axle across the structure has been defined.
The modal forces for the IMDPlus solution now need to be calculated using the Modal
Force Calculator.
Utilities
IMDPlus…
On the IMDPlus Main Control dialog click the Setup modal history information
button to proceed.
 Click the OK button to accept
the default information and
proceed.
Note. This process will take
only a minute or so on a modern
computer and does not need to be
repeated unless the moving load
path or configuration in Stage 1 is
changed.

Note. On the IMDPlus Main
Control dialog the Close button
can be clicked if you wish to see
the loadcases generated in the
Treeview.

Defining the Moving Load Parameters
All of the basic moving load information has now been defined for the IMDPlus
analysis. The next stage is to define the included modes, damping and speed
parameters.
Utilities
IMDPlus…
On the IMD Main Control dialog click the Run moving load analysis button to
continue.
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