THE FEATURES OF DEFORMATION OF SHELL-TYPE STRUCTURES UNDER CONDITIONS OF DYNAMIC LOADING
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 178, Issue 12
Abstract
The article is devoted to the large-velocity shell designs, the main supporting element of which is thin-walled cold-deformed arched metal profile, which is manufactured directly on the construction site. The peculiarities of the technology of carrying out construction works during the installation of these structures are analyzed, and features and problems of the use of these structures in the territory of Ukraine, USA and the European Union countries are considered. The object of the research is a fragment of the specified special shell system. The purpose of the research is to construct a finite-element model of the research object, as well as refine, on the basis of this model, the existing methods of calculating the considered structures. Also, the goal of the study is to determine the frequency of own and forced fluctuations of the object of research, numerically and experimentally, and verification of the finite-element model, by conducting a full-scale experiment. The algorithm of finite-element modeling of the research object is considered, and the boundary conditions of the calculation scheme are considered. The analysis of the strained-deformed state of the shell-type structure from the dynamic effect of the wind is carried out, as the core in which these cold-deformed thin-walled profiles are used. The research was carried out on the basis of a compiled finite element model that implements the properties of a special-purpose shell. On the basis of the performed calculations, the analysis of the stress-strain state and the amplitude-frequency (frequency and shape of the proper oscillations) of the characteristics of the shell structure have been carried out. The calculation model was verified on the basis of a full-scale experiment, during which a load was applied to the considered full-size fragment of the shell-type system and measurements of amplitude-frequency characteristics were made by two-channel vibration analyzer "ONIKS". The enumerated in the aggregate predetermined the introduction of the system through the design of a number of erected objects.
Authors and Affiliations
Petro Reznik, Roman Koreniev
Keywords
Related Articles
- EP ID EP396466
- DOI 10.18664/1994-7852. 178.2018.138974
- Views 72
- Downloads 0
RESEARCH OF RESISTANCE OF SPIKES AND SCREWS WHILE PULLING FROM WOODEN SLEEPER RESTORED BY POLYMER
On the railways, the main part of wooden sleepers replaced with reinforced concrete. They have longer service lives, provide a constant track width, are less exposed to atmospheric influences and require lower maintenanc...
THE EFFECT OF NANOADDITIVES ON THE HYDRATION OF GYPSUM BINDING AGENTS
The results of investigation of hydration processes of gypsum with carbon nanomodifiers are presented in the article. Gypsum modification by multilamellar carbon nanotube (CNT) results in the improvement of its compressi...
EXPERIMENTAL INVESTIGATIONS OF THE BEARING CAPACITY OF TWO-PASS’S NON-SEPARABLE REINFORCED CONCRETE BEAMS UNDER THE INFLUENCE OF LOW-CYCLIC REPETITIVE AND SIGN-LOADED LOADINGS
The results of tests of the bearing capacity of two-pass’s non-separable reinforced concrete beams under the influence of low-cyclic repetitive and sign-loaded loadings, in which features of change of reference reactions...
ADAPTIVE BAYESIAN MODELS FOR EVALUATING THE INDICATORS OF THE RELIABILITY OF FREIGHT CARS ON THE STAGES OF THE LIFE CYCLE
The article discusses the rationale for the application of the Bayesian model (BM) for calculating the reliability indicators of a freight car at the stages of its life cycle. The life cycle includes such stages as the c...
MATHEMATICAL MODELING OF 2EL5 ELECTRIC LOCOMOTIVE ELECTRIC TRACTION SYSTEM
The efficiency of the AC electric traction system is decisively influenced by the electric locomotives power factor. The power factor of electric locomotives with thyristor AC/DC converters is 0.8…0.84, when a recommende...