To define a torsional moment on one (or more) bars:
- Select the relevant bars.
- Click on
.
The following dialogue appears:
- Specify the beginning and end value of the torsion load.
If you modify the value from the first field, the same value will automatically appear in the second one. You can therefore obtain a uniform load.
If you also modify the value in the second field, the value from the first field will stay the same and you will obtain a trapezium load.
This load is always defined according to the local coordinate system of the bar. - Specify the position of the load with respect to bar ends.
By default, the start point of the bar is the point with the smallest X-coordinate.
When both ends have the same X-coordinate, it’s the point with the smallest Y-coordinate.
When both end have the same Y-coordinate, the point with the smallest Z-coordinate is the start point.
The same criteria are applied to set the orientation of the bar, the start and the end of a bar can also be deducted from the orientation of its local axes. - When the button
is active, you specify an absolute distance.
By clicking once on the button, it changes to 
. Now you can enter a relative distance using a percentage. 0% corresponds to the beginning of the beam, with 25% of L/4 from the beginning point, 50%, with L/2 from the start point (= the middle of the line), etc. - Specify whether this load should be linked to a physical member.
