vestnikvniizhtВестник Научно-исследовательского института железнодорожного транспорта (ВЕСТНИК ВНИИЖТ)RUSSIAN RAILWAY SCIENCE JOURNAL2223-97312713-2560Joint Stock Company "Railway Research Institute"10.21780/2223-9731-2019-78-3-162-168vestnikvniizht-313Research ArticleДругоеMiscellaneousМетодологический подход к оценке структуры конструкционно-теплоизоляционных материалов зданий и сооружений железнодорожного транспортаMethodological approach to estimation of the structure of load bearing insulation materials of buildings and constructions of railway transportАдилходжаевА. И.AdilkhodzhaevA. I.

Адилходжаев Анвар Ишанович, д-р техн. наук, профессор, проректор по научной работе и инновациям, Ташкент, 100067, Узбекистан

Anvar I. Adilkhodzhaev, Dr. Sci. (Eng.), Professor, Vice-rector for scientific work and innovation, Tashkent, 100067, Uzbekistan

ШаумаровС. С.ShaumarovS. S.

Шаумаров Саид Санатович, канд. техн. наук, доцент, кафедра «Строительство зданий и промышленных сооружений», Ташкент, 100067, Узбекистан

Said S. Shaumarov, Cand. Sci. (Eng.), Associate Professor, Department “Construction of buildings and structures”, Tashkent, 100067, Uzbekistan

shoumarovss@gmail.comЩипачеваЕ. В.ShchipachevaE. V.

Щипачева Елена Владимировна, д-р техн. наук, профессор, кафедра «Строительство зданий и промышленных сооружений», Ташкент, 100067, Узбекистан

Elena V. Shchipacheva, Dr. Sci. (Eng.), Professor, Department “Construction of buildings and structures”, Tashkent, 100067, Uzbekistan

БегматовН. И.BegmatovN. I.

Бегматов Нодир Исмоилович, аспирант, Москва, 129626, Россия

Nodir I. Begmatov, Post-graduate, Moscow, 129626, Russia

Ташкентский институт инженеров железнодорожного транспорта (ТашИИТ)УзбекистанTashkent Institute of Railway Engineers (TashIIT)UzbekistanАкционерное общество «Научно-исследовательский институт железнодорожного транспорта» (АО «ВНИИЖТ»)РоссияJoint Stock Company “Railway Research Institute” (JSC “VNIIZhT”)Russian Federation201926072019783162168Copyright © Адилходжаев А.И., Шаумаров С.С., Щипачева Е.В., Бегматов Н.И., 20192019Адилходжаев А.И., Шаумаров С.С., Щипачева Е.В., Бегматов Н.И.Adilkhodzhaev A.I., Shaumarov S.S., Shchipacheva E.V., Begmatov N.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.journal-vniizht.ru/jour/article/view/313

Разработан новый метод исследования особенностей структуры конструкционно-теплоизоляционных материалов для наружных ограждающих конструкций зданий и сооружений железнодорожного транспорта. Выполнен численный эксперимент, в котором идеальная структура ячеистого бетона моделировалась с учетом условий, близких к реальным образцам. Полученные данные были проанализированы на основе построенных гистограмм для заданного процента пор во всем рассматриваемом диапазоне (от 10 до 90 %). Результаты модельных расчетов аппроксимированы кривыми Гаусса (нормальный закон распределения вероятностей) и Коши — Лоренца. Таким образом, новый методологический подход к оценке структуры ячеистого бетона, основанный на использовании современных информационных технологий, достаточно точен в определении и по своей практической реализации гораздо проще классических методов исследований.

The article considers the question of the development of a new methodological approach to the creation of a heat-insulating constructional building material for external enclosing structures of buildings and constructions of railway transport. As the strength of cellular concrete is directly proportional to the average density, and the thermal properties are inversely proportional, solution to the problem of optimizing macrostructure of material in order to simultaneously improve its strength and thermal properties is much more complicated. In addition, when optimizing the properties of cellular concrete, it is necessary to vary the components that form it. Thus, optimization, ultimately, is reduced to solving a multifunctional problem with variable multicomponent parameters. Solving the problem of optimizing macrostructure of cellular concrete on the basis of an experiment using the “trial and error” method is very expensive. Moreover, even an experiment based on some technological approach does not guarantee a positive result for the values of average density taken in a reasonably wide range. Given that the thermal properties of cellular concrete are closely related not only to its average density and, consequently, to average porosity, but also to the pore size distribution and structure features in general, the method of estimating pore structure of the material in a simple and accessible way is of particular interest. A numerical experiment was performed in which the structure of cellular concrete was modeled to conditions close to real samples. To do this, using a random number generator for a given range of sizes of spherical pores and a given percentage of porosity, the structure of cellular concrete was modeled. The modeling results were analyzed on the basis of the constructed histograms for a given percentage of pores in the entire considered range (from 10 to 90 %). Results of model calculations were approximated by Gauss curves (normal law of probability distribution) and Cauchy – Lorentz curves. Thus, the new methodological approach to estimating structure of cellular concrete, based on the use of the modern approach from the standpoint of information technology, is quite accurate in defining and in its practical implementation much simpler than classical research methods.

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The authors declare that there are no conflicts of interest present.