I am trying to create a simple linear dynamic simulation that uses a displacement base excitation as an external load and roller/slider fixtures on four sides of a cube to limit the cube to movement in one direction. I am varying the displacement with time with a sine wave at 90Hz with Amplitude of .1mm. I am not sure why the output displacement of this simulation is giving the following output as there are no constraints preventing the cube from moving in the one direction. Shouldn't the output be the same as the input? If there is something I am misunderstanding or a setting I need to change please let me know.