Can someone please explain why the results for a stiffener ring give a different external pressure than the MAEP allowed for the cylindrical shell that it is attached to? I am modelling different scenarious for a standard cylindrical shell with stiffener rings. For some courses of the shell, the calculated MAEP of the shell is equal to the external pressure displayed in the ring calcs. For other courses, the MAEP of the shell is equal to the external pressure used in the ring calcs. Why are the ring calculations using a different external pressure than the MAEP of the shell?
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