Alibre Design

Chapter 19 - Alibre Motion5. Select Initially un-stretched if you want the spring assumed to be initiallyunstretched in the design at the start of simulation. Any subsequent deflection willcause the spring to produce a force or torque acting towards this initial point.6. Select Unstretched Length / Unstretched Angle if you want the spring assumedto be already stretched in the original design, at the start of animation. You canspecify the natural length or angle of the spring in the text-box to the right.7. Select OK to save and apply the changes you made; or click Cancel to abandonyour changes.‣ To Edit a Spring1. Right-click the Spring in the Motion Explorer, and select Edit, or simply doubleclickon the spring item.‣ To Re-Name, Delete, or Suppress Springs1. Right-click the Spring in the Motion Explorer, and select the required option.Suppressed Springs are shown greyed out.19.5.4 DampersDampers in Alibre Motion have no non-linear behaviour, and produce a force or torquethat is perfectly proportional to the linear or angular velocity. The force or torqueproduced by a damper always opposes the motion.‣ To Add a Damper:1. In the Motion Explorer, right-click on a constraint, and select Insert2. Choose either Linear or Rotary damper. The Linear Damper dialog opens.546