Specifying a Torsional Spring

Select Spring from the dropdown menu of the Structural tool in the Physics group of the Simulation tab, or by selecting the Spring tool in the Structural condition HUD.

Define the spring by selecting two faces or a face and a point. Click

or Alt-click to select your second location.

If your model contains Named Selections, you can click Advanced filters, select Link named selections, and choose one from the list.

Select a Torsional spring type. Torsional springs generate a force that rotates about the axis.

Enter a Stiffness value.

Enter the spring Length, defined as the distance between the center of the two selected faces or between the center of the selected face and a point.

Additionally, in the Refine stage, you can optionally select a Preload type.

Select Torque to define the preload as a force in the opposite direction, then enter a non-zero value for the torque.
Select Rotation to define the preload as a rotational displacement, then enter the displacement as a non-zero value.

Click Accept to complete the setup.