The processes of structure formation and features of polymer composites with special properties are investigated, the main kinetic processes that have a decisive influence on the structure formation and properties of polymer composites are identified. The expediency of considering kinetic (transient) processes as a necessary and sufficient sign of the structure formation of a thermosetting is substantiated. A mathematical method for the synthesis of polymer composite materials of increased density using the quality functionals of kinetic (transient) processes is proposed. The proposed mathematical methods and models allow to effectively solve the problem of plasticization and modification of high-viscosity polymers, as well as to carry out multi-criteria synthesis of composite materials with strictly specified parameters of structure and properties using the quality functionals of kinetic (transient) processes.
Kinetic processes of unfilled polymers structure formation are explored and mathematical method of polymer composites modelling using kinetic (transient) processes quality functionals is proposed. Advisability of kinetic (transient) processes consideration as necessary and sufficient sign of thermosetting binder structure formation is justified. The processes occurring during the formation of the modified polymer and appearance of qualitatively new properties while maintaining chemical individuality of each component are considered. Approbation of mathematical method is carried out in the construction of mathematical model and study of unfilled epoxy resin ED-16 viscosity.
An oil refinery and the surrounding natural environment are pre-sented as complex technical systems, as objects of research and modeling. The principles and methods of systems analysis, the theory of mathematical modeling and mathematical statistics, and correlation-regression analysis were used for this. Methodological principles of modeling the interaction of petrochemical production waste with the environment are proposed. On the basis of the proposed principles, a hierarchy of criteria and a systematic analysis of the system “petrochemical production - natural environment” are carried out. As the coordinates of modeling and control, it is proposed to take a set of indicators of the ecological state of an object in the vector space of ecological perfection, which sets all of its ecological, technical and economic properties in a single range of values. The system «petrochemical production - natural environment» is presented as a structural and logical model of a waste management system, showing the properties of synergy and emergence. Proposed methodological approaches and mathematical models of the system «petrochemical production - wastes from oil refineries - natural environment» allow to correctly assess technological risks, the ef-fectiveness of the waste management system at petrochemical enterprises, the impact of unforeseen situations and accidents, the impact on the envi-ronment of waste from petrochemical enterprises, as well as the environ-mental and economic effect of the introduction of new technologies for oil refining and disposal of production waste.
, Санкт-Петеpбуpгский Балтийский госудаpственный технический унивеpситет им. Д. Ф. Устинова "Военмех" Модульная синхpонная индуктоpная машина в системе электpопpивода 1. Констpукция модульной синхpонной индуктоpной машины
The paper presents the results of research and model tests a modular switched reluctance machine (MSRM) and shows the construction implemented in a prototype and tested in static mode, with a detailed explanation of the construction of an electromagnetic modules. It emphasized a number of positive aspects of the practical implementation of this construction, in particular the princi ple of increasing the overall capacity and distinctive features of its mathematical descri ption. An algorithm for calculating the parameters of the electromagnetic module of the machine in the FEA software package Ansys Maxwell is shown too. On the basis of the calculation results presented in the analytical and graphical form, developed a mathematical descri ption MSRM and created a computer model of the MSRM and a computer model of an electric drive on its basis in the software package MATLAB-Simulink, which confirmed the limit characteristics of the machine specified in the design. Electric drive with the considered machine built by princi ple of subordination control with the internal current loop, which use the relay s in each phase, i.e. sliding mode, and the outer loop speed, which use the PI regulator.
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