soft modeling on a frame of a rail car

[Afro90]

Hello everyone!!! I am a student with the use of ansys (use version 15) and I am a bit confused with the modeling of the springs that are connected to the railway car in apdl environment. I thought of modeling them as lines (circle in green in the annex) but I don't know what element to associate them, what do you recommend me?? link11, beam188 or combin14?? ? or is there a better way to shape them?? I thank you in advance for your availability.

 

[volaff]

I used combin14 in the past.
of course you must know the rigidity of the same along the three directions by defining the real constant