Recall there is a constraint equation connecting the
y-displacement of sets
Tip-a and
Tip-b, where the degree of freedom for set
Tip-a is eliminated from the system equations.
Thus, apply the load as a concentrated force of magnitude
–10000 to set
Tip-b. Name the load Tip
load. Because of the constraint, the load will be carried
equally by both trusses.
The crane is attached firmly to the parent structure. Create an encastre
boundary condition named Fixed end, and apply
it to set Attach.