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Fig. 32 from the 2014 GENOPT paper.
Two optimum designs of the special case called “fold98updown” with “symmetry-antisymmetry” boundary conditions applied along both the left-hand and right-hand longitudinal edges:
Top: The same optimized profile shown at the top of Fig. 9 (not smoothed; “corners” are present.)
Middle: The panel is re-optimized with use of the Fig. 9 design as a starting design. (“Corners” are present.)
Bottom: This profile is the same as that shown in the middle frame except that the “corners” have been smoothed and the left and right ends have zero slope in the x-direction. There has been no further optimization.
The purpose of lowering the upper bounds of PHISEG(2), PHISEG(3), PHISEG(4) and PHISEG(5) is to try to come up with an optimum design which can be fabricated by stamping, that is, an optimum design with no “doubling back” such as that exhibited near the right-hand end of Major Segment No. 4 in the top frame.
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