Motion of a flexible body due to force exerted by fluid motion.
 

I have to simulate the motion of a cantilever beam due to the force exerted on it due to a moving fluid.
Basically, the problem is somewhat like this:
A flexible cantilever beam is mounted on one of the walls inside a tank. The as a whole moves in sinusoidal motion, resulting in motion in fluid, which is further transmitted to the beam.
Now I need to simulate its motion. So can someone please tell me how can I link the forces generated to the structural part of ANSYS.

Start with the tutorial in the Help Documentation:

ANSYS Documentation > Workbench > System Coupling User's Guide > Tutorial: Oscillating Plate with Two-Way Fluid Structure Interaction.

Also, in the "Tutorials and Training Material" section on the ANSYS Customer Portal search for "FSI" and download the latest Fluent FSI training course.