Hi to everybody!
I've a strange problem.I'll try to explain it in the best way.
I consider a 30inches line, 10-S schedule (7.92mm), 150RF.
You find attacched an example below:
At node 10 there's an equipement connection; at node 1000 there's a vertical restraint which sustains a flare starting after node 130.
This line has -163°C as operating temperature and 10 barg as design pressure.
At node 10 there's a thermal displacement in Z: -12.5 mm
I've considered two case:
1) at node 10 only thermal displacement in Z and null displacement inZ at node 1000
2) at node 10 a +233 mm displacement in Z (I've alredy deducted thermal displacemet) and +245.56mm displacement in Z at node 1000
I think that relative displacement among other nodes should be the same in two cases considered above.
Analysing simulation I find different values:
- between node 30 and 58 there's 9.411mm displacement in the first case while 12.763mm in the second case.
- between node 80 and 128 there's 10.894mm displacement in the first case while 8.305mm in the second case.
Why displacements are different? Why the two deflections aren't the same?
I hope somebody can help me.
Regards