Technical Physics最新文献

{"title":"Simulation of Aeroelastic Oscillations of Structural Elements Using the Vortex Particle Method in the VM2D Code","authors":"A. Kolganova","doi":"10.1134/S106378422670026X","DOIUrl":"10.1134/S106378422670026X","url":null,"abstract":"<p>This paper presents the application of vortex particle methods for simulating external flows around engineering structures using the VM2D code, which has been enhanced with a hybrid fast algorithm that combines the Barnes–Hut method and the Fast Multipole Method. This approach reduces computational costs preserving physical accuracy, thereby enabling long-duration simulations of problems that were previously prohibitive with direct algorithm. The capability of the fast algorithm is demonstrated through three test cases, confirming its suitability for practical engineering applications.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 of","pages":"273 - 281"},"PeriodicalIF":0.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009203","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}

{"title":"Development of Solvers for Systems of Linear Algebraic Equations for Cell-Centered Methods with a 7-Point Discretization Stencil","authors":"V. V. Puzikova","doi":"10.1134/S1063784226700313","DOIUrl":"10.1134/S1063784226700313","url":null,"abstract":"<p>Solvers of systems of linear algebraic equations based on domain decomposition and multigrid methods demonstrate high efficiency in solving two-dimensional problems using cell-centered methods with a 5-point discretization stencil. In the 3D case, such methods utilize a 7-point stencil, requiring modification of the solvers. The aim of this work is to develop similar solvers for systems arising from the solution of three-dimensional problems using cell-centered methods with a 7-point discretization stencil. Formulas for computing the elements of the system matrices in three-dimensional subdomains and on interface planes, considering the 7-point stencil, are derived. It is shown that the structure of the interface system matrix coincides with the two-dimensional case. Therefore, the same direct solver used for 2D can be applied. Solving systems within subdomains is performed using the FGMRES method with preconditioning. When using the multigrid method as a preconditioner, certain parts of the algorithm require modifications for the transition from 2D to 3D. An algorithm for 3D ADLJ-smoother is presented. Since the considered system is derived from cell-centered grid methods where unknowns are located at cell centers rather than grid nodes, non-standard projection and prolongation operators are required for transferring between grid levels. The general principle for their constructing is demonstrated for 1D. Based on these formulas, three-dimensional operators are constructed for all possible cases. The developed solvers were verified on systems formed when solving three-dimensional hydrodynamics problems using the LS-STAG-3D immersed boundary cell-centered method with a 7-point stencil. For comparison, similar solvers for the two-dimensional case were also considered, applied to systems of the same dimension but formed from solving two-dimensional hydrodynamics problems using the LS-STAG method. Computational experiments show that the required accuracy is achieved in a comparable number of iterations for 2D and 3D problems of the same system dimension.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 of","pages":"313 - 326"},"PeriodicalIF":0.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009352","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}

{"title":"A New Upper Bound Solution for a Cylinder Compression Considering a Generalized Yield Criterion and Coulomb Friction","authors":"E. Lyamina,&nbsp;O. Novozhilova","doi":"10.1134/S1063784226700234","DOIUrl":"10.1134/S1063784226700234","url":null,"abstract":"<p>The upper bound theorem provides one of the major methods for analyzing metal-forming processes. However, most solutions assume the friction law that postulates that the friction stress equals a fraction of the shear yield stress. Meanwhile, Coulomb’s friction law is often required in applications. The finite element method is usually used in this case. The present paper develops a procedure for applying the upper bound theorem in conjunction with Coulomb’s friction law to evaluate the compression force in a cylinder compression. Moreover, the derivation is based on the concept of the work function, rather than the conventional approach based on the yield criterion and its associated flow rule. The two adopted work functions ensure that any physically reasonable ratios of the shear yield stress to the tensile yield stress are satisfied for materials with no strength-differential effect by choosing the parameters in these functions. Numerical results illustrate the general derivation.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 of","pages":"246 - 253"},"PeriodicalIF":0.7,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009643","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}

{"title":"Modeling of a High-Speed Bird Strike against Metal and Composite Panels","authors":"A. V. Babaytsev,&nbsp;A. A. Bolshikh,&nbsp;T. M. Kudelya,&nbsp;D. D. Gribtsov","doi":"10.1134/S1063784226700118","DOIUrl":"10.1134/S1063784226700118","url":null,"abstract":"<p>In this article, comparative analysis is performed for the bird strike resistance of an aluminum panel of thickness 2 mm and a composite lamella of thickness 11.2 mm (quasi-isotropic package [45/0/90/–45/–45/90/0/45]) under a strike of a bird of mass 1.78 kg at a speed of 142 m/s. It has been established experimentally that the metal panel withstands the strike without punching, demonstrating plastic deformation, while the composite lamellar has been punched completely in spite of the fact that its thickness is more than five times larger. The rated stiffness equivalent was 3.2 mm; however, even the increase of thickness to 11.2 mm, the composite did not ensure a comparable impact resistance. The developed VUMAT user procedure for describing the progressive destruction of the woven composite demonstrated the high validation precision: the average error as compared to ASTM D3039/D3410 tests was 5% on the average. Analysis of the energy absorption revealed that composite lamellas absorbed a much smaller fraction of the impact kinetic energy as compared to metal analogs of the same thickness. The results of the tests demonstrate the impossibility of the direct replacement of aluminum flaps by composite lamellas with equivalent stiffness without a revision of designing criteria for dynamic loads.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 4","pages":"131 - 139"},"PeriodicalIF":0.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721050","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}

{"title":"Mathematical Modeling of Long Wave Propagation in the Bosphorus Strait","authors":"A. Yu. Belokon,&nbsp;D. I. Lazorenko,&nbsp;V. V. Fomin","doi":"10.1134/S1063784225601565","DOIUrl":"10.1134/S1063784225601565","url":null,"abstract":"<p>The Bosphorus Strait, connecting the Black Sea with the Sea of Marmara, is one of the narrowest straits. At the same time, the strait is a place of intensive international shipping, which requires a comprehensive study of the water dynamics in this area, in particular, the possible greatest wave heights that can penetrate into the strait from the Black and Marmara Seas. In this paper, we studied the propagation of long waves in the Bosphorus Strait using the ADCIRC numerical hydrodynamic model. Spatial distributions of sea level during the propagation of long waves in the Bosphorus Strait were analyzed for different scenarios of their generation. Three cases of wave generation were considered: propagation of a single wave in the Bosphorus Strait from the Black and Marmara seas; propagation of a tsunami in the strait; and sea level disturbance caused by bottom movement inside the strait. It has been established that when single long waves penetrate the strait, the height along the strait axis does not exceed the initial wave height, while level fluctuations near the coast could increase by more than 1.5 times compared to the height of the initial disturbance. The maximum level increases in the Bosphorus Strait when tsunami waves penetrate from the Black Sea could reach over 1.6 m. When a tsunami from the Sea of Marmara spread in the strait, the level increase was about 2.7 m. The generation of disturbance as a result of bottom movement inside the strait did not lead to significant amplification of sea level fluctuations.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 4","pages":"140 - 151"},"PeriodicalIF":0.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721051","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}

{"title":"Physical Principles for the Models of Cognitive Chain Reactions and Activity Manipulation Scenarios in Communication Networks","authors":"A. Yu. Perevaryukha","doi":"10.1134/S1063784226700143","DOIUrl":"10.1134/S1063784226700143","url":null,"abstract":"&lt;p&gt;In this article, the modeling technique is developed using the principles of a controllable chain of particle decays for the scenario of propagation of an aggressive information effect causing a pulsed activity of network users. Present peculiarities of interpersonal information communication medium are considered as a special “digital world” with the formation of formal collective behavior rules. The effects of spontaneous pulsed phenomena of mass activity of digital communication participants and the sharp increase in the interest indicators, which is induced by an aggressive content have become regular events. The features that make it possible to employ the principles of physical analogies to analyze the transmission if emotional contagion and psychological excitation between different network sites, where processes are analogous to media with different abilities of neutron slowing down and absorption in a reactor. The groups that have experienced influence become unstable and emit pulses themselves in the network of their contacts like the radioactive isotope nuclei, albeit not at random, but via the created contacts. The wave of influence dissipates and changes the topological structure of stable social communications and produces new but not random communications. The conception of modeling of the explosive growth of tension in a network and emotional contagion effects is substantiated using the concepts of network chain reactions, in which the method for analyzing the traffic based on artificial intelligence are characterized by a regular function. In a virtual medium with a global transmission of a content that has induced a mass response, the terms like “network storm,” “information tsunami,” and “hype waves” are used since new wave effects have appeared in the network. The phenomena of short surges of mutual aggression in a network are studied in the context of emotional contagion. The spreading of this effect in the epoch of algorithms of formation of news feeds can be made controlled and targeted. In the specially induced processes of an extremely intense propagation of an information content causing a response in the communication network, the conditions for manipulation over the offline behavior of a group of susceptible users, which play the role of nuclei decaying in a neutron flow, are maintained. The technologies of network traffic monitoring and tracing make it possible to determine the form of a sharp intensification in the network activity. Examples of the artificially created agitative interest because of information leak technology are investigated. For a targeted promotion of the content and for raising its popularity indicators, coordinated chains of fake accounts are used, which changes the type of oscillations of network traffic. The scenarios of organization of information waves during fake leaks and the dynamics of spontaneous formation of naturally attenuating waves are considered. It is confirmed that the induce","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 4","pages":"167 - 180"},"PeriodicalIF":0.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721049","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}

{"title":"Analysis of the Effect of Pulsed Currents Flowing from the Lightning Grounding Electrode on the Underground Optical Communication Lines","authors":"O. S. Belova,&nbsp;D. V. Bolotov,&nbsp;S. Yu. Kazantsev,&nbsp;T. K. Kivshar,&nbsp;N. Yu. Lysov,&nbsp;A. G. Temnikov","doi":"10.1134/S1063784226600177","DOIUrl":"10.1134/S1063784226600177","url":null,"abstract":"<p>We present the results of physical modeling of action of the lightning current flowing through the grounder in a high-resistance soil to nearby located fiber-optic communication lines. The action of the electromagnetic field induced by the leaking pulsed lightning current on a fully dielectric fiber-optic cable located in the soil is considered. As the path of pulsed current, we consider two electrode systems partially located in the soil near the optical cable. In the course of experimental investigation, rapid changes in the State of Polarization of the signal transmitted through a fiber with a rate exceeding the current pulse growth rate have been observed. The amplitude of such changes circumscribed a full circle on the Poincare sphere.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 4","pages":"152 - 158"},"PeriodicalIF":0.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721003","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}

{"title":"Bandpass Filters Based on Multimode Microstrip Resonators with a Hairpin Conductor","authors":"B. A. Belyaev,&nbsp;S. A. Khodenkov,&nbsp;A. M. Serzhantov,&nbsp;I. V. Govorun","doi":"10.1134/S1063784226700155","DOIUrl":"10.1134/S1063784226700155","url":null,"abstract":"<p>Half-wave and quarter-wave microstrip resonators (MRs) with a rectangular stripline conductor split at one of its ends by a slot have been studied. Capacitive and inductive equivalent circuits have been constructed for the lower three oscillation modes of resonators and a third-order filter on their basis. It has been shown that the frequency responses of three-mode MR filters and their equivalent circuits, both tuned to the same bandwidth, are in good agreement with each other. It has been found that one can use a single MR to create devices with a passband arising from resonances between two, three, or even four lower oscillation modes by varying the width and length of the gap in the hairpin stripline conductor. The boundaries of feasible passband relative widths for second-, third-, and fourth-order filters have been determined.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 4","pages":"159 - 166"},"PeriodicalIF":0.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147721004","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}

{"title":"Calculation of the Angular Distribution of Backscattered Ions in Diffusional Approximation","authors":"L. Forlano,&nbsp;A. I. Tolmachev","doi":"10.1134/S1063784225600845","DOIUrl":"10.1134/S1063784225600845","url":null,"abstract":"<p>We calculated the angular distribution of ions backscattered from a solid target. The results of previous theories are generalized for the case of arbitrary angles of ion incidence. Approximate analytical theory is developed also.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 2","pages":"60 - 63"},"PeriodicalIF":0.7,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631779","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}

{"title":"Analysis of Operation Parameters of a Fire-Tube Boiler Using Hydrogen-Containing Gas Mixtures","authors":"V. R. Zhikhareva,&nbsp;S. N. Petin,&nbsp;M. A. Kislitsyn,&nbsp;N. M. Bonadykov","doi":"10.1134/S1063784225601589","DOIUrl":"10.1134/S1063784225601589","url":null,"abstract":"<p>The article is devoted to the passage of the boiler equipment to hydrogen-containing fuel in the context of modern requirements of decarbonization of power engineering. The topicality of this investigation is due to the growing demand in hydrogen technologies and the requirements of reduction of the carbon trace in heat-and-power engineering. Potential sources of hydrogen-containing fuel (including the possibility of recycling waste gases from various systems of oil-processing plants) are considered. This study is aimed at analysis of peculiarities of heat and technical parameters in the transition to the combustion of methane–hydrogen mixtures (MHM) with different hydrogen contents using a fire-tube three-pass water-heating boiler with a power of 8 MW. In the course of investigation, a complex thermal design of a boiler has been considered for different operation modes and hydrogen contents in the fuel mixture. A special software in the Python language has been developed for the automated designing of MHM combustion processes and for heat-exchange surfaces of the boiler. The results of investigations demonstrate that an increase in the fraction of hydrogen in the fuel to 20% makes it possible to increase the boiler efficiency by 0.1%, while the complete transition to hydrogen increases the efficiency from 0.4 to 1.3% depending of the load of a boiler aggregate. In this case, a substantial decrease in the discharge of CO₂ to the atmosphere is observed, while after the complete transition to hydrogen, carbon dioxide outbursts are absent. However, a transition to hydrogen fuel requires analysis of a number of technical limitations (reduction of the caloric power, increase of volume flow rate of the fuel, and changes in combustion type and heat transfer). The practical importance of this study is the assessment of operation parameters of the actual energy equipment of a power system. Our investigations have revealed the effectiveness of a gradual increase of the hydrogen fraction in the fuel mixture as a compromising decision between environmental requirements and technical and economic indices.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 3","pages":"111 - 118"},"PeriodicalIF":0.7,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631825","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}