Tabu search optimization of externally pressurized barrels and domes

Barrelled cylinders and domes of generalized elliptical profile are optimized for their buckling resistance when loaded by static external pressure. The optimum shells are found using either a static or adaptive tabu search method, which utilizes a repeat structural analysis tool. Results show that it is possible, through correct profiling of a meridian, to achieve failure pressures 40% and 20% higher than a benchmark cylinder and hemisphere, respectively. Numerical predictions are confirmed by pressurizing a series of laboratory-scale shells to destruction. Correlation between numerical predictions and experimental results is good.