https://sci.ldubgd.edu.ua/jspui/handle/123456789/1881 2026-04-07T05:23:09Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/9396 Title: Mathematical Modeling of the Earth Heat Processes for the Purposes of Eco-technology and Civil Safety Authors: Starodub, Yuriy; Karpenko, Vasyl; Karabyn, Vasyl; Shuryhin, Vladyslav Abstract: The article suggests a new model of the Earth's thermal processes, based on a new understanding and formalization of cumulative processes of heating and cooling of parts of the Earth (inner core, outer core and mantle, crust, atmosphere). The geothermal model of the Earth with heat fluxes constructed according to the laws of thermodynamics, in which from a depth near to the center of the Earth's core there is a constant power coming from a depth to the surface of the Earth. One of the consequences of the new model of the Earth's thermal processes is the justification of the existence of an internal source of heat in the center of the Earth's core, from which an energy is absorbed in a small part by its substance and, in the larger part, is emitted into the open physical space. Mathematical modeling of the Earth heat processes formulate a new understanding of the thermal processes in our planet in general and is the basis for creating tools for predicting dangerous natural processes of endogenous origin, making possible the stability analyzing of natural geosystems, developing and new eco-geotechnologies. Description: ECO-TECHNOLOGY AND CIVIL SAFETY 2020-09-23T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/8069 Title: МОДЕЛЮВАННЯ ВПЛИВУ ЕКОЛОГО-ГЕОФІЗИЧНОГО СТАНУ ҐРУНТІВ НА ІНЖЕНЕРНІ МОСТОБУДІВНІ ОБ'ЄКТИ Authors: Стародуб, Ю.; Гаврись, А.; Козіонова, О. Abstract: Розглянуто методику моделювання реакції ґрунтової товщі під інженерними об'єктами на еколого-геофізичний стан у задачах вивчення негативного впливу навантажень на напружено-деформований стан ґрунтів під інженерними об'єктами. Розглянуто проблему вивчення стійкості стану та досліджено поведінку ґрунту в околі мостоінженерних будівельних конструкцій. Для вирішення завдань попередження надзвичайних ситуацій застосовано метод моделювання реакції ґрунтового шару на навантаження під об'єктами інженерії, а також враховано тектонічні впливи при вивченні напружено-деформованого стану земної кори в околицях інженерних об'єктів. Розроблено алгоритм використання методу скінченних елементів у задачі вивчення напружено-деформованого стану основ ґрунтів під інженерними об'єктами. Здійснено фізико-математичну постановку задачі. Задача моделювання вирішується на тестових прикладах. Розроблено моделі суцільного середовища функціонування інженерних споруд, для яких моделюються напружено-деформаційні характеристики масиву ґрунтів. Проведено теоретичне визначення та моделювання критичних значень напружено-деформованого стану ґрунтового масиву під впливом навантажень. Моделювання дозволяє передбачити характер впливу механічних процесів на еколого-геофізичний стан навколишнього середовища та дослідити стійкість інженерних споруд. Досліджено напружено-деформаційні процеси гірського масиву, у результаті яких виникають надзвичайні ситуації природного та техногенного характеру. Description: MODELLING OF THE EFFECTS OF THE ENVIRONMENTAL-GEOPHYSICAL STATE OF SOILS ON ENGINEERING BUILDING OBJECTS The article deals with the method of the reaction modelling of soil strata under engineering objects to ecological and geophysical state in the problems of studying the negative influence of loads on a stress-strain state of soil under engineering objects. The problem of stability study is considered and the behaviour of soil in the vicinity of bridge-engineering structures is investigated. To solve the problems of emergency protection, a method of modelling the reaction of the soil layer under the load on the engineering objects due to tectonic influences to study the stress-strain state of the ground crust in the vicinity of engineering objects is used. An algorithm of the finite element method in the problem of studying the stress-strain state of soil base under engineering objects has been developed. The physical and mathematical formulation of the problem is carried out. The modelling problem is solved by test cases. Models of the continuous environment of functioning engineering structures for which stress-strain characteristics of the soil massif modelled are developed. The theoretical definition and modelling of critical values of the stress-strain state of the soil mass under the influence of loads are carried out. Modelling allows to predict the nature of the influence of mechanical processes on the ecological and geophysical state of the environment and to study the stability of engineering structures. Stress-deformation processes of the rock massif are investigated, as a result of which emergencies of natural and man-made characters can arise. Keywords: soil, ecological and geophysical state, loaded engineering objects. 2020-01-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/8068 Title: FLOOD RISK ASSESSMENT OF CHERVONOGRAD MINING INDUSTRIAL DISTRICT Authors: Starodub, Y.; Karabyn, V.; Havrys, A.; Shainoga, I.; Samberg, A. Abstract: At the beginning of the century, few desktop review projects were carried out in Ukraine under the Global Water Partnership. In particular, interested in transboundary water research, there are some examples: Environmental Project Water Management of Kakhovka Reservoir and Lower Dnieper River (2000-2001) and Flood Management in Ukraine and Slovakia (2000-2003), and the 16th OSCE Economic and Environmental Forum “Maritime and inland waterways” (2007). The aforementioned studies were mostly dedicated to the establishment of a dialog between the governments and stakeholders. So far, basically, there is no applied research in order to perform the risk assessment in particular transboundary areas. For instance, during the past decade, both the Chervonograd coal mining industrial district in the Western Bug river region (the border between Eastern Poland and Western Ukraine) and the mitigating environmental risks for water security have been paid a little attention. The Lviv-Volyn carboniferous basin (Western Ukraine) is one of three major coal mining regions in Ukraine). This paper describes the recent preliminary results of applying GIS technology for simulation of flood risks and associated hazards in the Lviv-Volyn coal basin. The contamination of drinking water (Be, Yb, Co, and Pb) was considered as one of the main hazards in the territory of investigation. Using satellite optical imagery, flood modeling and the prediction of contamination were conducted in the areas of West Bug River and Vistula River. The input parameters were the following: the average water flows velocity 0.45-0.65 m/s, the width of the channel in the meadows 25-70 m, and the depth 1.1-1.7 m. The river runoff is adjusted by the dams of the Dobrotrivska thermal power station and the Sokalsky chemical factory. The water field is 6250 sq. km. The issue of increased risk of wasting drinking water resources in the region with an estimated population of about 15 million inhabitants is essential. 2018-10-10T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/8067 Title: Simulation process of the heat transfer in multilayered structures Authors: Starodub, Yuriy; Veselivskyy, Roman; Vasylenko, Oleksandr Abstract: The mathematical model of heat transfer in a metal- expanded polystyrene- the metal system is considered in the paper, taking into account the stratification and specificity of heat sources that appear in the process of thermal destruction of expanded polystyrene. Specificity of heat sources is based on the transition of expanded polystyrene from solid to the gaseous state during the heating of the prototype in the furnace behind the temperature regime of a standard fire. Considered the problem of the process of nonstationary heat conduction, the simulation was performed taking into account the transition time of expanded polystyrene into the gaseous phase, and also taking into account the time of action of additional heat sources using a numerical scheme based on the finite difference method modeling. The time of the loss of the heat-insulating capacity of the three-layered wall system was determined. A comparative analysis of the results of theoretical and experimental studies to assess their fire resistance was carried out. 2018-01-01T00:00:00Z