Risk-based design of marine pressure hulls require computationally efficient and precise models predicting collapse pressures ring stiffened cylindrical shells as a function realistic geometrical imperfections. However, the empirical interframe commonly implemented in codes do not explicitly depend on imperfections, existing analytical are only valid for axisymmetrically imperfect shells. The g...

Abstract Shells of revolution under axisymmetric conditions exhibit a circumferentially uniform pre‐buckling stress state and are important fundamental systems which often serve as reference for those more complex conditions. Given this status, work is continuing on careful complete characterization their buckling response with the aid Reference Resistance Design (RRD) framework ultimate benefi...

pistachio nuts are the major non-oil export agricultural commodity in iran. the existence of empty shells among the shells with kernels reduces the quality of the nuts and, consequently, their market value. in pistachio processing plants, empty shells are generally separated from shells with kernels by the flotation method. but this method is not precise and may encourage the growth of fungi in...

We propose a mathematical model of vibration elastic systems formed by conjugated shells revolution with different geometry in the field combined static axisymmetric loads. The is based on concepts geometrically nonlinear theory mean bending and realized within framework classical Kirchhoff–Love use contemporary methods applied mathematics numerical analysis. spectral picture shell structure el...