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This is Fig. 23 from the 2012 GENOPT paper. This slide shows the weight of optimized spherical balloons made of polyethylene terephthalate as a function of the number of modules over 90 degrees of meridian.
All of the results in this figure were obtained with models in which there are 31 nodal points in each segment of the multi-module model. For the models with truss-like webs there are six segments per module plus two additional segments near the equator (Fig. 4 of the 2012 GENOPT paper). For models with radial webs there are five segments per module plus four additional segments near the equator (Fig.3 of the 2012 GENOPT paper).
BIGBOSOR4 can handle up to 45 modules for models with truss-like webs and up to 55 modules for models with radial webs.
For models with large numbers of modules the number of nodal points per segment is limited by the total number of degrees of freedom permitted by BIGBOSOR4 for pre-buckling analysis (20000 d.o.f) and for bifurcation buckling analysis (30000 d.o.f.).
Compare this figure with Fig. 28 (two slides hence).
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