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This is Fig. 79 from the 1987 PANDA2 paper. This slide shows a complete cylindrical shell with applied overall moment M, axial compression P, and shear S; the assumed resulting distributions of line loads Nx and Nxy in the shell; and replacement of the actual complete cylindrical shell subjected to circumferentially varying line loads by a single cylindrical panel spanning 40 inches of circumference and subjected to three separate load sets, each of which acts alone and each of which has uniform line loads, Nx and Nxy.
This slide demonstrates the advantage of PANDA2's capabiliy of optimizing a panel subjected to several different sets of loads.
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