Objective. Development of a methodology for determining the allowable loads on existing structural elements, design model which is flexural-rigid thread, based requirements strength and rigidity due to changed operating conditions structures. Method. This study mathematical modeling problem conditional optimization. The objective function total potential energy deformation thread with some flex...

Here we show that weakly nonlinear flexural-gravity wave packets, such as those propagating on the surface of ice-covered waters, admit three-dimensional fully localized solutions that travel with a constant speed without dispersion or dissipation. These solutions, that are formed at the intersection of line-soliton mean-flow tracks, have exponentially decaying tails in all directions and are c...

This study focuses on the flexural properties of layered wall structures plastic tanks produced by rotational molding technology. The aim was to assess possibility replacing homogeneous walls rotationally cast large-volume underground with structural for stability and warpage prevention. possibilities material saving combining lightweight non-lightweight tank layers were investigated. By applyi...

the joints between segmental rings can withstand a certain amount of bending moment as well as axial and shear forces. generally, in the structural analysis of tunnel segmental lining, the joints can be modeled as elastic hinges or rotational springs, and their rigidity should be demonstrated in terms of the rigidity of the joints or their rotational stiffness. therefore, the bending moment act...