Reply To: artificial stresses at the fixed points in thermo-structural analysis

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In reality, the holes are primarily used to accommodate the pipes that carry the fluids. The heat exchanger is fixed in such a way that hemispherical headers are welded to it on all four sides. Additional plates are then welded to the headers and bolted in place. I attempted to replicate this fixture setup,but it resulted in high stresses(think it's overconstrained). I don't quite understand how it works in reality(because that is how the one which is in use is fixed)but not in the simulation. In any case, I tried using remote displacement at the center of each hole, but the progress bar gets stuck at 40%.