Ansys Workbench

For Simply supported beam, fix one end by using fixed support. On the other end use displacement load and make y (and z) as zero while x as free in x-y plane, use selection by components before doing the above steps. For hinged support use remote displacement loads and set all translational components as zero and make the other two as zero degree leaving the direction where the hinge is about to rotate. For roller support, object can move in horizontal so in displacement load make the other two axis except the horizontal axis as zero which gives a roller support