Specifications

151
As you can see, the model is very simple. The blue structure is an "arm" that extends from the center of the
yellow Ground reference frame. It is hinged at the Ground's origin, and a driver bends it downwards. With
the movement, the red ligament is stretched, and a force builds up in it. Try running the
InverseDynamicAnalysis operation. You will see the arm move, and you can subsequently open a Chart View
to investigate the results:
As you can see, the ligament force builds up from nothing to about -2000 N as it is stretched. The value is
negative by convention because it works in the opposite direction of the stretching. Notice that the graph
has an initial horizontal part. This is because force does not build up until the ligament is stretched beyond
its slack length, L0.
Basic mathematical behavior