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Mathematical modeling and energy conservation for rolling in passes
Metallurgist. 2010. Vol. 54. No. 7-8. P. 498-504.
Energy conservation during hot shape rolling can be achieved by reducing of working temperature, optimization of rolling speed and calibration schedules, including a reduction of the passes number. For this, at the design stage of technology, it is necessary to produce a targeted search of the optimum characteristics associated with the large number of preliminary estimations and calculations. The speed of algorithms and techniques witch used in the process of the search plays a key role and directly determines its effectiveness. The paper describes the method of finite element simulation of shape rolling process based on «2,5 D» techniques, which is due to the number of simplifications, allows to increase the speed of calculation considerably (by comparison with 3D modeling). To verify this technique the comparison of model results with data obtained at a metallurgical plant «Třinecké železarny» in the special industrial experiment was performed. The comparison confirmed the adequacy and effectiveness of the proposed models and computer system developed on their basis.
Keywords: математическое моделированиеMathematical simulationFast algorithmsComputer systemExperimental testingIndustrial testingБыстрые алгоритмыКомпьютерная системаПрокатка в калибрахЭкспериментальная проверкаПромышленное опробованиеЭффективность производства прокатаrolling in gruvesproduction efficiency
Chumachenko E. N., Aksenov S. A., Logashina I. V., Металлург 2010 № 8 С. 34-37
The paper describes the method of finite element simulation of shape rolling process based on 2,5D techniques which is due to the number of simplifications, allows to increase the rate of calculation considerably (by comparison with 3D modeling). To verify this technique the comparison of model results with data obtained at the metallurgical plant Trinecke ...
Added: April 12, 2012
Sergei Valentinovich Fedorenko, / Preprint. Series Preprint "Preprint". 2016.
In this preprint, we present an example illustrating the novel method for the discrete Fourier transform (DFT) computation based on the Goertzel-Blahut algorithm introduced in the paper "Improving the Goertzel-Blahut algorithm" (IEEE Signal Processing Letters, vol. 23, no. 6, pp. 824-827, 2016). ...
Added: February 3, 2018
Zakhariev I., Aksenov S. A., Logashina I. V., Металлург 2016
The paper is oriented toward the problem of superplastic materials characterization using free bulging testing. This experimental technique allows one to study the material flow behavior in conditions of biaxial tension which is very close to the ones occurring during hot gas forming. The interpretation of the results is proposed to perform by inverse analysis ...
Added: June 19, 2016
Fedorenko S., СПб. : ГУАП, 2008
Fast algorithms for decoding of linear block codes. ...
Added: February 3, 2018
Presnova A., Качество. Инновации. Образование 2016 № 2 С. 31-40
In this paper, using the theory of differential games developed the algorithm of constructing guaranteed control for nonlinear systems. Through the transition from the nonlinear model to model the linear form with parameters that depend on the state, will move from finding solutions to equations of Hamilton-Jacobi-Bellman equation to the Riccati equation. Moreover, the appointment ...
Added: May 3, 2016
Chumachenko E. N., Logashina I. V., Zakhariev I., Металлург 2016 № 4 С. 102-105
The paper is devoted to simulation, analysis and optimization of a forging technology for manufacturing of titanium sections of high-pressure apparatuses. Computer simulation of material forming during the forging was performed using finite element method. The punching force evolution was study as well as deformation uniformity of the product walls, fillability of the dies and ...
Added: May 17, 2016
Ростов н/Д : ООО "ДГТУ-Принт", 2017
В сборник включены... ...
Added: September 24, 2018
Podinovskiy V. V., Информационные технологии моделирования и управления 2010 № 5(64) С. 599-607
Предложена и обоснована математическая модель решения многокритериальных задач, в которой основное значение придаётся фактору объективной важности критерия. Развита теория и методы анализа многокритериальных задач на основе такой модели. ...
Added: October 21, 2012
М. : Институт прикладной математики им. М.В. Келдыша РАН, 2014
Содержит материалы, представленные к рассмотрению на научно-практический семинар “Новые информационные технологии в автоматизированных системах”.
Представляет интерес для научных сотрудников, преподавателей, аспирантов и студентов, работающих по указанным научным направлениям. ...
Added: April 12, 2014
[б.и.], 2018
Научное электронное издание подготовлено Институтом проблем управления РАН и Московским государственным университетом имени М.В. Ломоносова с целью развития и пропаганды достижений современной теории управления. В сборнике трудов научной конференции доклады представлены в виде статей по следующим направлениям:
•Математика и компьютерные науки в междисциплинарных исследованиях,
•Методы экспериментальной и теоретической физики в междисциплинарных исследованиях,
•Математическое моделирование глобальных процессов,
•Количественные модели и ...
Added: September 19, 2018
Подиновская О. В., Информационные технологии моделирования и управления 2010 № 1(60) С. 71-80
Статья рассказывает о принятии многокритериальных решений с использованием метода анализа иерархий. Метод Анализа Иерархий (МАИ) — математический инструмент системного подхода к сложным проблемам принятия решений. МАИ не предписывает лицу, принимающему решение (ЛПР), какого-либо «правильного» решения, а позволяет ему в интерактивном режиме найти такой вариант (альтернативу), который наилучшим образом согласуется с его пониманием сути проблемы и требованиями ...
Added: October 21, 2012
Podinovskiy V. V., Информационные технологии моделирования и управления 2010 № 1(60) С. 29-37
Работа выполнена в рамках Индивидуального исследовательского проекта № 09-01-0005 «Развитие теории и разработка методов использования интервальной информации об относительных замещениях критериев для анализа многокритериальных задач при помощи компьютерных систем поддержки принятии решений», выполняемого при поддержке Программы «Научный фонд ГУ-ВШЭ». Предложена и обоснована математическая модель многокритериальных предпочтений, в которой отношение предпочтения формируется с использованием интервальных оценок относительных замещений ...
Added: October 20, 2012
Novikov P., Ларионов В. И., Сущев С. П. et al., Вестник кибернетики 2017 № 2 (26) С. 44-50
The effects of some natural and artificial factors on the thermal interaction between a pipeline and permafrost soil has been studied. A mathematical model describing the soil temperature profile, thawed soil subsidence and pipeline elevation has been proposed. A temperature profile of the soil around the pipeline has been determined through solving the heat conductivity ...
Added: December 10, 2017
Aksenov S. A., Chumachenko E. N., Logashina I. V. et al., Hutnické listy 2010 No. 4 P. 110-113
The technological process considered in the paper is a rolling of a round bar in roughing mill group, which consist of four passes. The computer simulation of the process shows that the local plastic deformations occurring in the material are extremely large, which may lead to the appearing of defects. The investigations performed, led to ...
Added: April 12, 2012
Chumachenko E. N., Nazirov R., Logashina I. V. et al., Космические исследования 2011 Т. 49 № 4 С. 392-397
We discuss the materials associated with the formation of chaotic bands on the ice surface on Europe, a satellite of Jupiter. There are suggestions as to their origin. ...
Added: April 12, 2012
Soloviova (Solovieva) T. I., Belov A. V., Системотехника: Системные проблемы надежности, качества и информационных технологий 2012 № 10
The aim and the features of master program “Smart laser navigation systems” in MIEM of NRU HSE are described. Participation of research and development institute “Polyus” named by M.F.Stelmakh in creation and fulfillment of the master program is considered as an approval of actuality of the suggested applied education concept for Russian renewed technologies. ...
Added: January 18, 2013
Puzino Y. A., Вестник Чувашского государственного педагогического университета им. И.Я. Яковлева. Серия: Механика предельного состояния 2014 № 22 С. 46-52
The increasing of the efficiency of technological modes of steel products manufacturing requires simulation of metal forming during hot deformation. To obtain correct results, one should set the correct initial and boundary conditions, including the mechanical properties of materials, which represent the dependence of the stress-strain and strain rate at maintained temperature.
In the experiments one ...
Added: January 19, 2015
Ростов н/Д : Ростовский государственный экономический университет "РИНХ", 2018
The conference proceedings present the results of research of young scientists of the leading scientific organizations of Russia on a wide range of topical problems of Informatics, management and system analysis. Interdisciplinary research and intensive use of data are key features of modern science. The IMSA-2018 conference (Informatics, Management and Systems Analysis) aims to establish ...
Added: September 3, 2019
Kham T., Социальные и гуманитарные науки: теория и практика 2019 № 1(3) С. 167-183
The article examines the problems of defining the term computer simulations of scientific experiments. The first part analyzes the original method for classifying variations of terms proposed by Duran as the most successful for demonstrating significant existing contradictions among philosophers regarding the place and role of computer simulations in the philosophy of science. In the ...
Added: December 11, 2019
Bakanov V. M., М. : Издательство Московского государственного университета приборостроения и информатики, 2014
The manual sets out the requirements of science and industry, leading to use of multicomputer systems and multiprocessor systems, which inevitably use the principle of parallel computing, background and state of the art, describes the main approaches to the organization of multiprocessor computer systems, development of parallel algorithms for the numerical solution of problems and ...
Added: February 3, 2015
Romanov I., Вестник Московского университета. Серия 1: Математика. Механика 2011 № 4 С. 49-53
Рассматривается задача точного граничного управления колебаниями прямоугольной пластины. Доказывается, что колебания прямоугольной пластины (длины сторон которой рационально соизмеримы) можно привести в состояние покоя за конечное время. Причем, управляющее воздействие ограничено по абсолютной величине. ...
Added: October 2, 2012
Gromov V., Obodan N., Thin-Walled Structures 2016 Vol. 107 P. 612-619
The present paper presents the complete bifurcation structure of nonlinear boundary problem of thin-walled systems for cylindrical panel subjected to uniform external pressure. We examine various boundary conditions on straight edges (free, simply supported, rigidly clamped edges, edges with prescribed fixed joint conditions); curvilinear edges are simply supported. To construct solutions of the boundary problem ...
Added: October 5, 2018