Technical Physics最新文献

Numerical Study of Optimal Material Distribution in Elastic Bodies by Topological Optimization Method 弹性体中材料最优分布的拓扑优化数值研究

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225700288

A. E. Ushakov

{"title":"Numerical Study of Optimal Material Distribution in Elastic Bodies by Topological Optimization Method","authors":"A. E. Ushakov","doi":"10.1134/S1063784225700288","DOIUrl":"10.1134/S1063784225700288","url":null,"abstract":"The study is aimed at developing a universal topological optimization algorithm based on fundamental principles of elasticity theory and continuum mechanics. The objective of the study is to minimize the mass of a structure subjected to dynamic loads while maintaining its strength characteristics, which can be achieved by optimal distribution of material in the volume of the workpiece. An element of a tillage tool—a plate weighing 1.925 kg with maximum stresses of 176.8 MPa operating under variable mechanical stresses—was taken as a basic model Application of parametric modeling and systems approach implemented in the SysML language made it possible not only to select the best element for optimization, but also to develop a new geometry of the structural element (plate). The theory of elasticity, finite element method (FEM), and von Mises stress analysis were used as the physical foundations of the study. This algorithm was found to reduce the mass of the structural element to 1.585 kg, which corresponds to mass reduction by 17.67% while meeting the established requirements for the factor of safety (1.5 to 2.0). The presented method can be used both in aerospace engineering, materials science, machine tool engineering and automotive industry, where similar optimization principles can help to increase the efficiency of design solutions while reducing material consumption.","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 6","pages":"203 - 211"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of the Plasma Flow in Coaxial Channels of Different Diameters 不同直径同轴通道中等离子体流动的建模

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600328

V. M. Skornyakov, S. A. Ladygin, V. D. Telekh

引用次数: 0

Nonequilibrium Model of k-Distribution for Diatomic Atoms 双原子k分布的非平衡模型

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600146

A. M. Molchanov, A. S. Kovalenko, Yu. V. Frolova

引用次数: 0

Features of Functioning of Modern Communication Systems in the Presence of Thunderstorm Activity 雷暴活动下现代通信系统的功能特征

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600274

O. S. Belova, D. V. Bolotov, S. Yu. Kazantsev, T. K. Kivshar, A.V. Orlov, A. G. Temnikov

引用次数: 0

Ultrasonically Assisted Mechanical Technique for Creation of Metal Protecting Coatings 超声辅助制造金属保护涂层的机械技术

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600432

O. A. Butusova, V. A. Mamonov, N. A. Bulychev

{"title":"Ultrasonically Assisted Mechanical Technique for Creation of Metal Protecting Coatings","authors":"O. A. Butusova, V. A. Mamonov, N. A. Bulychev","doi":"10.1134/S1063784225600432","DOIUrl":"10.1134/S1063784225600432","url":null,"abstract":"This research introduces an innovative ultrasonic-driven mechanochemical technique for creating protecting coatings, either metallic or ceramic, on metallic surfaces with the purpose of corrosion inhibition. Two variations of the method have been explored. In the first variation, hard balls and powdered metal or ceramics are placed inside a bowl-shaped resonant chamber that is secured beneath the surface to be coated. In the second variation, only the balls are contained in the chamber while the surface has been pre-treated with a mixture of a liquid and powder was applied as a suspension. An ultrasonic transducer affixed to the bottom of the chamber induces high-frequency vibrations, resulting in chaotic movement and collisions between the balls and powder particles, effectively hammering them into the metallic surface. Experimental investigations utilized substrates made of aluminum and stainless steel, along with powders such as titanium, silicon carbide, and alumina, as well as various liquids for the pre-coating process. The findings indicated that the technique facilitates the creation of diverse coatings and protective layers on metal surfaces at ambient temperatures, irrespective of the differences in the properties of the materials employed.","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 5","pages":"146 - 150"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of the Possibility of Detecting Failures in Active Modules of a Digital Antenna Array 数字天线阵列有源模块故障检测可能性评估

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600389

A. D. Bogomolova, T. M. Kozlov, A. A. Karpenko

引用次数: 0

Investigation of Changes in the Allotropic Structure of Graphite Surface under Plasma Exposure in the EAST Tokamak and PLM 等离子体辐照下石墨表面同素异形体结构变化的研究

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S106378422560033X

L. G. Lobanova, V. P. Afanas’ev, L. Zhang, A. V. Dedov, M. A. Semenov-Shefov, S. Wang, J. Chen, S. D. Fedorovich, H. Liu

{"title":"Investigation of Changes in the Allotropic Structure of Graphite Surface under Plasma Exposure in the EAST Tokamak and PLM","authors":"L. G. Lobanova, V. P. Afanas’ev, L. Zhang, A. V. Dedov, M. A. Semenov-Shefov, S. Wang, J. Chen, S. D. Fedorovich, H. Liu","doi":"10.1134/S106378422560033X","DOIUrl":"10.1134/S106378422560033X","url":null,"abstract":"This study presents a method of X-ray photoelectron spectroscopy that facilitates the analysis of both photoelectron peaks excited in vacuum without inelastic energy losses, as well as the adjacent energy loss regions. Using this method, the changes in the allotropic modifications of carbon materials subjected to helium plasma exposure, simulating conditions at the plasma-wall interface in nuclear fusion reactors, as well as deuterium plasma exposure in the EAST tokamak, were comprehensively investigated. Additionally, the effects of helium plasma on the fine-grained dense graphite grade FDG-8 were examined. The results indicate that the surface of the FDG-8 graphite sample exposed to plasma transitions to a structure resembling pyrolytic graphite. Furthermore, the graphite utilized as first-wall material in the EAST tokamak was analyzed. Findings demonstrated that operating graphite materials in the EAST tokamak leads to a transformation of the near-surface layers of graphite into amorphous diamond-like structures, which in turn results in the formation of diamond crystals on the surface of the graphite. Consequently, the carbon coating on the EAST tokamak acquires dielectric properties, rendering such coatings unsuitable for use as plasma-facing materials. The study also discusses the potential for developing graphite-based coatings with properties essential for effective first-wall materials.","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 6","pages":"180 - 187"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature Dependence of the Manganese Emissivity 锰发射率的温度依赖性

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600493

D. V. Kosenkov, V. V. Sagadeev

引用次数: 0

On Peculiarities of Heat Exchange in Channels of a Small-Sized Baseboard Heating System 小型底板采暖系统通道内换热特性研究

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600225

Yu. M. Grishin, N. A. Khandramay

{"title":"On Peculiarities of Heat Exchange in Channels of a Small-Sized Baseboard Heating System","authors":"Yu. M. Grishin, N. A. Khandramay","doi":"10.1134/S1063784225600225","DOIUrl":"10.1134/S1063784225600225","url":null,"abstract":"The results of numerical 3D modeling of free-convective heat-transfer processes in a small-sized “warm baseboard”-type heating systems are reported. The thermal and hydrodynamic parameters of the heated air flow are calculated for the vertical channel of the baseboard system, which is formed by two horizontal hot tubes with transverse ribs. The criterion dependences of the effective coefficient of heat transfer from the main structural and mode parameters of the system to air being heated are obtained. It is shown that due to the presence of tubes in the channel between the ribs, the heat-transfer coefficient that can be calculated using the found correcting factor decreases. The optimal values of the gap between the ribs and heating tube diameter, which ensure the maximal specific (per unit length) heat flux from the surrounding medium, are determined. Comparison of the calculated data with experimental results shows their satisfactory coincidence. The obtained results can serve as the basis for developing the methods for designing such heat-exchange heating systems. It is shown that the proposed optimal geometrical parameters of the baseboard system ensure a considerable increase in the heat power as regards the maximal values (by 30–40%) and in the possible range of variation of the specific heat power of baseboard system as compared to the known variants of such systems.","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 5","pages":"151 - 157"},"PeriodicalIF":0.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Electric Arc Metallization Parameters on the Coating Strength 电弧金属化参数对镀层强度的影响

IF 0.7 4区物理与天体物理

Technical Physics Pub Date : 2025-07-30 DOI: 10.1134/S1063784225600535

I. N. Kravchenko, S. N. Kuznetsov, S. A. Velichko, Yu. A. Kuznetsov, E. I. Cherkasova

引用次数: 0