I am trying to simulate the movement of rubber hoses supported by coil springs so I can determine where to connect the springs. I've created realistic moving hoses (although they aren't as stiff as they should be) and tried using the spring tool in motion analysis, but when I try to calculate the movement after adding the springs, the parts won't move.

The end result I'm looking for is allowing one connection point of the hoses to move horizontally while the springs are used to prevent the hoses from falling too far vertically when gravity is applied. If it helps, it's a semi-trailer's air hoses to the axles that I'm trying to simulate.

The red box symbolizes the area that the hoses can't fall into.