Rarka,

I've corrected your model and it should be attached. I've made the following changes:

1) Change the Tie rod rigid elements to one rigid element spanning the entire length of the joint with a dummy node at one end.
2) Connected the dummy node to the line node via C-nodes.
3) Revised the tie rod temperature to ambient.
4) Deleted the bending stiffness which was rigid.
5) Entered an estimated effective diameter. You should enter the actual if you have it. It will effect the pressure thrust load on the tie rods.
6) You should enter the actual axial and torsional stiffness's if you have them. If you don't have them, then you should enter a low number. You can consult the manufacturer's catalog for approximate numbers.
7) You should confirm that the lateral spring rate is the single bellows spring rate and NOT the universal spring rate.

I hope the above is of assistance.