The simulation cannot be successfully performed without constraints. We insert constraints to four edge nodes on rails.
Note: Constraints are required for frame simulations. If you start a simulation without constraints, a dialog box opens and displays the error message: No constraints are defined.
- In the Constraints panel, click Fixed
. - You are prompted to select an origin of the fixed constraint. Select any of the nodes at the end of rails. Order is not important because we insert fixed constraints to all these four nodes as shown in the following image.
Note: A symbol is displayed at the node when the constraint is applied, and a node is added to the browser. - After you apply the first fixed constraint, right-click and select Repeat Fixed Constraint. Select another node at the end of beam rails. Use this method to place fixed constraints to all four nodes at the ends of rails. You can zoom in the graphics window to see if constraints are applied.