Hi All;

This may be a very basic question but I could not find a satisfying solution around.

I am observing an analysis of a power plant which is done before. There are two main connection point sets including the turbine and the boiler. The stress values (displacements and the allowable forces-moments) of the turbine are given at right on the turbine which can be assumed as rigid after implying the displacement values.
But the problem I can not solve is about the boiler side. The terminal points are somewhere inside the piping( ofcourse the rest of piping seems very complicated at boiler part). At the terminal points the displacements and the resulting force-moment values are given for operating and earthquake conditions. But is this appropriate to use these values indepently. Is not the geometry of the rest of the piping will affect the results?
A more basic question is how we can do this kind of analysis including more than one party?

What is the practical and theoritical solution for this problem?
Best Regards;