• SetFree[dropcon, options] builds a FreeSystem object
containing the mathematical equations required to find
equilibrium conditions of the current model. The dropcon
argument is used to specify the constraint(s) that are dropped
to make the system underconstrained. • The format of dropcon is
identical to that used by the Constraints function. • The
FreeSystem object is solved with SolveFree. • The following
options can be given: • If InitialGuess or InitialCondition is
unspecified, SetFree uses the current model initial guesses, as
obtained from LastSolve. • InitialCondition can also be
specified in SolveFree. • If Solution->Static is given, the
model must have some nonzero applied loads for a static
equilibrium position to exist. • If Solution->Kinematic is
given, the model must have velocity-dependent loads applied, or
no equilibrium velocity can exist. • If Solution->Dynamic is
given, the model must have nonzero masses applied to at least
one moving body with SetBodies. • See also: SetCouple. Load the
Mod