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Information × Registration Number 0218U001171, 0115U000022 , R & D reports Title The study wave propagation and evaluation of sustainability layered homogeneous and heterogeneous natural systems and engineering structures. popup.stage_title Head Gorodetskaya Natalya Sergeevna, Registration Date 25-01-2018 Organization The Institute of Hydromechanics of the National Academy of Sciences of Ukraine popup.description2 The numerical modeling of the set boundary problems was performed on the third stage of the work, with comparison to results of calculations with simplified models, experimental numerical methods for determining the parameters of soils; from the study of the patterns of formation of a stress-strained state under the influence of gravitational and filtration forces. The object of the study is porous fluid-saturated soil media and dynamics of foundations on water-saturated soils. The purpose of the work is to study the mechanical properties of water-saturated soils, to conduct a theoretical analysis of the stress-strain state of their structures, by means of numerical analysis; The attention was also paid to the study of the vibration of the stamp on a porous-elastic fluid-filled layer and half-space. Research methods аre analitical, numerical and instrumental experiments on the de-termination of soil massives mechanical characteristics, the solution of systems of differential equations with initial and boundary conditions, and the solution of dynamic contact problems. In the first part of the report a system of equations for solving problems of deformation of soil-saturated water of soil structures based on the model of viscous flow of porous medium is developed and the numerical algorithm and programs for solution of test tasks and visualization of results for the subsequent analysis of processes preceding the violation of the stability of ground slopes and slopes structures are created. The hydromechanical approach to determining the stability and failure of slant and slopes is substantiated, which is that the soil structures have properties of viscous media which have passed the yield strength due to previous loads. The result of the close coincidence of potential (possible) displacement surfaces with the lines of the current of the viscous material and the pore fluid of the considered structures, which indicates the great influence of these factors on the stability of slopes and slopes. If we consider that the current lines are significantly different from the circular cylindrical forms of the displacement surfaces, then it follows from the conclusion that the application of approximate methods is limited. By means of model calculations it is determined that the OpenFoam system can be successfully applied for numerical simulation of problems of deformation of complex soil structures within the framework of the viscous flow theory and have powerful means for analyzing and visualizing numerical results. The importance of conducting physical modeling and on-site monitoring of soil slopes and analysis of their results for the design of soil structures and assessment of the stability of slopes, especially in zones of a rough topography, are shown. The dynamic interaction of the foundations of structures with a water-saturated ground base is modeled in the second section through impedance functions which are located for a certain frequency range and for given contact form when solving integral equations of dynamic contact problems using the orthogonal polynomial method. Examples of calculating the dependence of impedance on the basis parameters on the Biot model, the geometry of the ground area and the contact area are considered. Product Description popup.authors Городецька Наталія Сергіївна Литвиненко Олена Романівна Островерх Борис Миколайович Рева Тамара Леонідівна Савицький Олег Анатолійович popup.nrat_date 2020-04-02 Close