The input was done by another stress engineer, I am checking the system as
senior stress engineer. Fixed end is modelled as XYZ restraint, sliding as YZ restraint. The model is correct, the seismic values are very high as it is D class site with the upper end of stack swaying largely.
the heat exchanger dia is 1500 where as pipe dia is DN 600m, so you can imagine how piping can dominate the heat exchanger.
The nozzle loads are high hence trying to get the heat exchanger stiffness as correct as possible.
Regards,
_________________________
Ajay SK