From
Open, navigate to the
C:\Users\Public\Public Documents\Autodesk\Inventor Nastran 2023\Tutorial\en-us\Inventor 2023 folder and open
trailer frame a.ipt.
Click
File,
Save As and save the part as
Beams Trailer Frame a.ipt. This allows you to reuse the original part.
Click
Environments > Autodesk Inventor Nastran.
Go to
Tools > Document Settings > Units. Set the units to inch and lbmass (pound). They will become the
Default units.
Or, double-click
Units in the tree and select a
Unit System with units set to inches and pounds.