Buckling behavior of ring-stiffened cylinder shells under axial pressure-Part 2: Numerical simulation and derivation of an engineering model

ABS TRACTThe closely positioned ring stiffeners can signi-ficantly improve the load-bearing capacity of the cylindrical shell and effectively delay its buckling.The investigations pre-sented in Part 1 have impressively confirmed this outcome. In general, numerical approaches can also analyze the stability problem of shells quickly and effectively. However, there is still a challenge to accurately recalculate the experimental results because the actual geometry is difficult to reconstruct in the numerical model. In this paper, the inverse distance weighted interpolation method based on a mapping relationship is used to map the geometry obtained with 3D scan to the numerical model.The Newton Raphson method with accompanying ei-genvalue analysis is used to quickly obtain the ultimate load of the ring-stiffened cylindrical shells under axial pressure. Besi-des, the influencing factors of ring stiffener on the load-be-aring capacity of the cylindrical shell are analyzed with help of a large number of parameter study. Finally, an engineering model is derived from the results of the parametric studies. This simplified model for hand calculation allows engineers to work with just a calculator.