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This is Fig. 2 from the 2010 GENOPT paper. The weld land is inserted into an internally ring and stringer stiffened cylindrical shell without any weld lands that has previously been optimized by PANDA2.
This slide displays half of a T-stiffened weld land, and identifies the decision variables for the specific case called “wcold”.
Optimization is performed with the use of GENOPT/BIGBOSOR4.
Although TSKIN is a decision variable, it has very tight lower and upper bounds so that during “wcold” optimization cycles TSKIN will not differ materially from the optimized value determined during the previous PANDA2 optimization of the “acreage” into which the T-stiffened weld land is later embedded.
ECLAND is not a decision variable but is established by a linking expression that forces the outer surfaces of the curved weld land plate of thickness TLAND and the acreage cylindrical shell of thickness TSKIN always to be flush during optimization cycles. (drawing by Robert Thornburgh)
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