| 摘要 |
FIELD: construction.SUBSTANCE: invention relates to structures of reinforced panels and calculation of resistance of such structures exposed to combined loads. The panel is made of homogeneous and isotropic material. The panel comprises lining, reinforced (with a net) from three parallel bundles of stiffening elements built into the panel. At the same time pockets outlined on the lining by groups of stiffening elements, have triangular shape. Angles between bundles of stiffening elements are such that triangular pockets have the shape of the isosceles triangle. As dimensions of the flat panel are set by the analytic method, redistribution of applied stresses is taken into account between the panel and the net of stiffening elements as a result of residual warpage at the stage of setting of effective straight section for each type of the stiffening element; residual warpage of the pocket at the stage of calculation of effective panel thickness; plasticity of applied external loads at the stage of realisation of iteration process over various properties of the material, in particular, Young's modulus and Poisson ratios, and with the help of the Ramberg-Osgood relationship.EFFECT: invention provides for calculation of permissible stresses for various types of warpage and adapted load factors, possibility to install panels reinforced with triangular pockets, minimised structure weight.9 cl, 1 tbl, 30 dwg |
