Forces on a dam in a simuation
To the right is a dam modelled for simulation. You must tell the program
where the dam feels forces. Here, the forces are signified by the yellow
dots. First, on the left hand edge, the dam feels the force of the water.
Second, on the slanted right edge, the dam feels the weight of the concrete
at a single point (it really should be at the centroid). The force of the
water and the weight of the concrete are the two most important forces to
include in your simulation.
Along the bottom edge, the red dots tell the
program that the dam is fixed to the foundation.