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Co-continuous Composite Material design Using the Volumetric Distance Field Based on Analytic Shape Functions

Journal of Harbin institute of Technology(New Series) 2019年第1期26卷 88-96页

作者： Huimin Han Dong-Jin Yoo Yan Liang Department of Computer Aided Mechanical Design Engineering Daejin University Department of Mechanical and Electrical Engineering Hainan Institute of Science and Technology

An effective and simple design method for co-continuous composite material construction is proposed by using a hybrid methodology with triply periodic minimal surface( TPMS) cellular topology and the volumetric distance field( VDF). After generating a set of VDF-based features for the given exterior shape and desired internal core structure,a series of simple modifications in distance fields enabled us to obtain an arbitrarily-shaped complex co-continuous composite material computational model. design results and manufactured prototypes through 3 D printing technology show that the proposed methodology has the potential to open a new paradigm for producing multifunctional next generation co-continuous composite materials which are impossible to design and manufacture using traditional CAD and CAM.

关键词： triply periodic minimal surface (TPMS) cellular topology volumetric distance field (VDF) co-continuous composite material model basic feature 3D printing technology

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designing Robotic Groups Under Incomplete Information About the Dominance of Many Goals

Designing Robotic Groups Under Incomplete Information About ...

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作者： Misyurin, S. Yu. Nelyubin, A.P. Potapov, M.A. National Research Nuclear University MEPhI 31 Kashirskoe shosse Moscow Russia Mechanical Engineering Research Institute RAS 4 Malyi Kharitonievski pereulok Moscow Russia Institute of Computer Aided Design RAS 18/19 2nd Brestskaya Moscow Russia

The article presents an approach to solving the problems of choosing the best designs of robots and their combinations in the presence of incomplete information on potential goals. Such information is modeled using binary relations of preference (dominance) on the set of robots and goals. An analytical review of various definitions of optimality and dominance of robots is given. Based on the proposed models, a number of typical problems of designing groups of robots are formulated and recommendations are given for their solution. The advantage of our approach is that it allows you to find the best solutions for maximizing the achievement of many goals with limited resources. This is achieved through the use of all available information about potential goals and preferences when choosing robots designs, building them into a group that covers as many goals as possible, and choosing an appropriate strategy. The ideas of the methods are illustrated by examples. © 2020, Springer Nature Switzerland AG.

关键词： Decision making

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Multicriteria Approach to Control a Population of Robots to Find the Best Solutions 10th

Multicriteria Approach to Control a Population of Robots to ...

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10th Annual International Conference on Biologically Inspired Cognitive Architectures, BICA 2019

作者： Misyurin, Sergey Yu. Nelyubin, Andrey P. Potapov, Mikhail A. National Research Nuclear University MEPhI 31 Kashirskoe Shosse Moscow Russia Mechanical Engineering Research Institute RAS 4 Malyi Kharitonievski Pereulok Moscow Russia Institute of Computer Aided Design RAS 18/19 2nd Brestskaya Moscow Russia

A bio-inspired and multicriteria approach to the design of promising robotic systems consisting of groups of robots and able to rebuild and adapt to changing goals and operating conditions is proposed. © 2020, Sp... 详细信息

ISBN: (纸本)9783030257187

关键词： Multiobjective optimization

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On vortices in the tube flow of ideal media 15

On vortices in the tube flow of ideal media

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15th Russian Conference on Thermophysical Properties of Substances, RCTP 2018

作者： Denisenko, V.V. Fortova, S.V. Shepelev, V.V. Troshkin, O.V. Institute for Computer-Aided Design Russian Academy of Sciences Vtoraya Brestskaya 19/18 Moscow123056 Russia

Numerical simulation is presented, which models the evolution of the initial perturbation in axisymmetric subsonic flow of an ideal gas. The undisturbed flow is an axial flow perturbed by an azimuthal velocity, or a twist of the flow around the axis of symmetry. The twist leads to the establishment in the flow of an annular or ball vortex with increasing or decreasing radial axial velocity of the undisturbed flow, respectively. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Vortex flow

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Analysis of Some Parameters of Synthesized Anodized Aluminum Oxide Matrices

Analysis of Some Parameters of Synthesized Anodized Aluminum...

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International Conference on Modern Problems of Radio Engineering, Telecommunications and computer Science

作者： Roxoliana Bukliv Volodymyr Adamiv Ihor Bordun Nazariy Andrushchak Ihor Teslyuk Anatoliy Andrushchak Department of Chemistry and Technology of Inorganic Substances Institute of Chemistry and Chemical Technologies Lviv Polytechnic National University Lviv Ukraine O. G. Vlokh Institute of Physical Opics Ivan Franko National University of Lviv Lviv Ukraine Department of Electrical Power Engineering Czestochowa University of Technology Czestochowa Poland Department of Ecology and Sustainable Environmental Management Lviv Polytechnic National University Lviv Ukraine Computer-Aided Design Systems Lviv Politechnic National University Lviv Ukraine Department of Applied Physics and Nanomaterials Science Lviv Polytechnic National University Lviv Ukraine

ISBN: (数字)9798331520564

ISBN: (纸本)9798331520571

Studies have been conducted on anodized aluminum oxide (AAO) nanomatrices manufactured by SmartMembranes (SM) (Germany) and InRedox (USA). An X-ray fluorescence analyzer determined the quantitative and qualitative composition of AAO matrices. It is shown that the AAO matrices have a large transparency window (250 - 2750 nm) and the dependence of the second harmonic generation (SHG) signal on the pore size. The parameters of the porous structure of the samples were estimated by isothermal processes of nitrogen adsorption/desorption at its boiling point (T = 77 K).

关键词： Micrometers Sensitivity Fluorescence Market research Harmonic analysis Frequency conversion Telecommunications Nitrogen Isothermal processes Aluminum oxide

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Simulation of Cycling Damage under High-Frequency Loading with Grid-Characteristic Method on Overlapping Meshes

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Mathematical Models and computer Simulations 2024年第SUPPL 1期16卷 S66-S75页

作者： Khalid, Waleed Golubev, Vasily Nikitin, Ilia Stratula, Boris Moscow Institute of Physics and Technology (National Research University) Moscow oblast Dolgoprudny Russian Federation Institute of Computer Aided Design Russian Academy of Sciences Moscow Russian Federation Institute for System Analysis Russian Academy of Sciences Moscow Russian Federation

Abstract: An approach to address the cycling damage under the high-frequency loading problem using the grid-characteristic method with an overlapping meshes technique and first obtained results are presented. Fatigue fracturing is an important problem in different applied areas, for example, aircraft manufacturing. Even tiny amplitude loading of turbine blades leads to their damage and destruction after multiple cycles. Simulation of this process should allow to develop new materials and constructions with significantly higher durability. However, the consideration of the full-wave physical problem in spatial domains with complex geometries can be quite expensive in computational time. Therefore, a detailed mathematical model and robust numerical method are presented in this work. The solver is validated on the commercial software Ansys, applied for the simulation of two-dimensional static problem. The special scale procedure for the three-dimensional problems is discussed. © Pleiades Publishing, Ltd. 2024.

关键词： cycling damage grid-characteristic method high-frequency loading overlapping meshes

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On spots chain dynamics in stratified fluid

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AIP Conference Proceedings 2022年第1期2522卷

作者： V. A. Gushchin I. A. Smirnova Institute for Computer Aided Design RAS 19/18 2nd Brestskaya str. Moscow Russia

The task of dynamics of the chain of spots of mixed liquid in stratified environment is considered. Initially, the chain of spots is located on a horizontal level with periodic boundary conditions along the horizontal axis. The task is described by the Navier-Stokes equations in the Boussinesq approximation. Under the influence of hydrodynamic forces, this chain turns into a streak of the width of π/2, if radius of spot is 1. Salinity is chosen as a stratifying component, just as it can be implemented in the laboratory. To solve the problem, the SMIF method is used. The finite-different scheme of which has such properties as the second order of approximation on spatial variables, minimal scheme dissipation and dispersion. The results of the formation of a streak depending on the Reynolds and Froude numbers values are presented.

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On the Cabaret Scheme for Incompressible Fluid Flow Problems with a Free Surface

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Mathematical Models and computer Simulations 2019年第4期11卷 499-508页

作者： Gushchin, V.A. Kondakov, V.G. Institute for Computer Aided Design Russian Academy of Sciences Moscow Russian Federation Nuclear Safety Institute Russian Academy of Sciences Moscow Russian Federation

Abstract: This paper proposes a new approach for solving problems of vortex structures’ interaction with a free surface. The second-order accuracy finite-difference scheme based on the well-known CABARET scheme is suggested for incompressible viscous fluid with a free surface. The CABARET method in the case of an incompressible medium additionally solves the problem of the velocity field’s solenoidation. Solving such a problem implies solving a system of linear equations with respect to the pressure variable and then taking the pressure gradient into account when calculating equations of motion. Solving the system of linear equations is a separate related problem that is not included in the description of the CABARET method, and this paper presents only the problem statement without specifying a specific method for solving the system. © 2019, Pleiades Publishing, Ltd.

关键词： direct numerical simulation (DNS) free surface vortex pair motion

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Cosmic voids and the kinetic analysis. III. Hubble tension and structure formation in the late Universe

arXiv

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arXiv 2023年

作者： Gurzadyan, V.G. Fimin, N.N. Chechetkin, V.M. Center for Cosmology and Astrophysics Alikhanian National Laboratory Alikhanian Brothers str.2 0036 Armenia Yerevan State University Manukian str.1 Yerevan0025 Armenia SIA Sapienza Universita di Roma Via Salaria 851/881 Rome00191 Italy Keldysh Institute of Applied Mathematics of RAS Miusskaya Sq. 4 Moscow125047 Russia Institute of Computer Aided Design of RAS 2nd Brestskaya st. Moscow123056 Russia

We study structure formation in the late Universe within the Vlasov kinetic self-consistent field approach. Our work is principally focused on the use of the modified gravitational potential with a repulsive term of the cosmological constant, which is directly linked to observations that enable characterizations of the Hubble tension as the result of local and global flows. We formulate the criteria for the formation of the semi-periodic gravitating structures, along with the predictions of their quantitative scales associated with observable parameters. Our principal conclusion is that filament formation in the Local (late) Universe can proceed as a deterministic process that is distinct from the structures at larger scales that result from the essentially stochastic dynamics of density perturbations. Copyright © 2023, The Authors. All rights reserved.

关键词： Stochastic systems

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Godunov-Type Method and Shafranov’s Task for Multi-Temperature Plasma

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Mathematical Models and computer Simulations 2019年第3期11卷 360-373页

作者： Aksenov, A.G. Tishkin, V.F. Chechetkin, V.M. Institute for Computer Aided Design Russian Academy of Sciences Moscow Russian Federation Keldysh Institute of Applied Mathematics Russian Academy of Sciences Moscow Russian Federation

Abstract: A new multi-temperature code for a multi-component gas-dynamic is tested. The velocities of all components with nonzero mass are assumed to be identical to each other. The method operates with the tabular equation of state. The method may take into account the electron heat conduction, the radiation transfer, the exchange of energy between components, and the chemical reactions. The gas-dynamic part is based on the Godunov approach with the efficient approximate solution of the Riemann problem solver and the application of the local equation of state. The goal of the investigation is to verify the code and obtain an exact solution of Shafranov’s task for a shock wave in hydrogen plasma. © 2019, Pleiades Publishing, Ltd.

关键词： equation of state Godunov-type scheme multi-temperature plasma

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