Good morning,

A pipe line should be lifted in operating situation. I’ve made a model for this situation, but when I look to the results strange thinks are happening. Therefor I made a simplified model.

For this model I’ve made a straight pipe with 6 supports (+Y). This pipe is a 2” with std wall thickness. The temperature is 25 degrees with 20 degrees ambient. The pressure is 7.5 bar.
I have made 1 case W+T1+P1 (OPE). I’ve looked to the displacements in this case.

After this I have used this model again, but in the middle of the supports I created a displacement of 100 mm in the vertical direction. In this case I’ve made 2 cases. Case 1 is again W+T1+P1 (OPE) case 2 is W+T1+P1+D1 (ope).

When I look to case 2 I see the displacement of 100 mm so that looks correct.
When I look to case 1 the displacements are different than the displacements in the first model. It looks like the displacement positions are seen as "+y support".
For this case all the input is equal and the displacement is not used for this case so how is this possible?