2009

2 On the Spring/Damper/Jack Properties dialog box, enter 1 N/mm in the
Stiffness field.
3 Expand the dialog box. Select Spring Damper from the Type menu.
4 Click OK.
5 Return to isometric view.
6 Click Run on the Simulation panel.
The spring forces the door against the tab stop. The inertia of the door
and the resistance of the spring create a rebounding cycle. The resistance
of the spring gradually overcomes the inertia of the door.
You can add damping to the spring to control the abruptness of the swing of
the door as it reaches the tab stop.
Add damping
1 Return to Construction Mode.
2 Right-click Spring/Damper/Jack, and then select Properties.
3 Enter 1 N s/mm in the Damping field.
Edit spring size
1 In the Dimensions section, change the Radius value to 11.
2 In the Properties section, change the Wire radius value to 5.
NOTE These changes are cosmetic and do not affect the physical properties
of the spring.
3 Click OK.
4 Click Run on the Simulation panel.
The rate of swing is damped, the door contacts the tab stop more gently,
and the rebound cycle is greatly reduced.
Next, you simulate the force needed to open the gate.
Create a force
1 Return to construction mode.
Working with Joint Triad | 69