The paper presents a mathematical model of deformation of thin-walled cylindrical shell panels, taking into account transverse shears, geometric nonlinearity, and the presence of ribbed stiffeners. Dimensionless parameters are used. The computational algorithm is based on using the Ritz method and the method of continuation of the solution with respect to the best parameter. There are shown the values of critical buckling loads for several variants of structures, depending on the chosen method of taking into account the reinforcement and the number of stiffeners.

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Описан высокоэффективный алгоритм экспорта BIM-моделей из BIM-пакета Autodesk Revit с целью построения интерактивной визуализации в виртуальной и дополненной реальности. Для демонстрации эффективности алгоритма выполнена его апробация на информационной модели с высокой степенью детализации. Проведен сравнительный анализ с различными программными комплексами, автоматизирующими экспорт BIM-моделей Purpose: built-in tools of software packages, such as Autodesk Revit or Renga do not allow rendering realistic BIM-model. Visualization tools of various graphical packages (Autodesk 3ds Max, Blender, Cinema 4D etc.) are mostly using ray tracing, which makes it almost impossible to change the camera angle, geometry materials, lighting parameters etc. in real-time. Therefore, an interactive BIM-model visualization is needed. Such visualization achieves its maximum efficiency when virtual and augmented reality technologies are employed, which allow studying the designed object in volume but requires preliminary processing for model optimization. The purpose of this work is the development of an algorithm for preparation of BIM-model for interactive visualization in virtual and augmented reality. Methodology: processing of BIM-models developed in BIM-modelling software package Autodesk Revit is considered (but main concepts could be applied to other BIM-modelling software packages). Autodesk 3ds Max was selected for model’s geometry processing. Various features of BIM-model export were examined, as well as available ways for optimization of geometry of a building, BIMmodel component structuring and material management. A literature on the subject of the study was analyzed. Findings: a universal algorithm has been developed allowing, on the basis of the information model of the building, in the shortest possible time to prepare a highly optimized 3D model, ready for interactive visualization Value: the developed algorithm can be applied to a BIM-model of any complexity. High level of model optimization allows performing realistic visualization with various interactive components thereby increasing overall realism of interactive visualization

В статье описаны децентрализованные автономные организации, как субъект экономических отношений, рассмотрены варианты их использования в период санкционного давления, раскрыты недостатки этой технологии на текущем этапе. The article describes decentralized autonomous organizations as a subject of economic relations, considers options for their use during the period of sanctions pressure, reveals the shortcomings of this technology at the current stage.

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