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Moscow University Mechanics Bulletin最新文献

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On the Possibility of Dissipative Stabilization of a Periodic Motion of a System with One Degree of Freedom 一自由度系统周期运动耗散稳定的可能性
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-07-24 DOI: 10.3103/S0027133025700153
V. A. Zubenko, E. I. Kugushev, T. V. Shakhova
{"title":"On the Possibility of Dissipative Stabilization of a Periodic Motion of a System with One Degree of Freedom","authors":"V. A. Zubenko,&nbsp;E. I. Kugushev,&nbsp;T. V. Shakhova","doi":"10.3103/S0027133025700153","DOIUrl":"10.3103/S0027133025700153","url":null,"abstract":"<p>A conservative system with one degree of freedom admitting a periodic motion is considered. The system is located on a translationally moving base. Linear viscous friction forces are added to the forces acting on the points of the system. We determine the law of motion of the base that allows preserving the periodic motion of the initial system relative to this base. The conditions when the periodic motion becomes Lyapunov asymptotically stable are obtained by using the Vazhevsky inequality.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 2","pages":"89 - 93"},"PeriodicalIF":0.7,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vector Properties of Elastoplastic Processes of Deformation along Plane Paths of Moderate Curvature 中等曲率平面变形弹塑性过程的矢量性质
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-07-24 DOI: 10.3103/S0027133025700141
A. V. Muravlev, M. A. Stepina
{"title":"Vector Properties of Elastoplastic Processes of Deformation along Plane Paths of Moderate Curvature","authors":"A. V. Muravlev,&nbsp;M. A. Stepina","doi":"10.3103/S0027133025700141","DOIUrl":"10.3103/S0027133025700141","url":null,"abstract":"<p>Various hypotheses proposed with the Il’yushin plasticity theory framework and expressed in terms of ODEs and multiple integrals are studied. One of the key aspects of this approach is a classification of constitutive equations by the complexity of loading for which a certain relation is suitable. Some relations of markedly different forms are proposed for a group of strain paths with moderate curvatures; this group is the most general kind of stress-strain relations in this classification. In the present paper the connections between those relations are discussed.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 2","pages":"81 - 88"},"PeriodicalIF":0.7,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Il’yushin’s Particular Postulate and Nonlinear Relations for Anisotropic Bodies 各向异性体的伊留申特殊公设与非线性关系
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-06-04 DOI: 10.3103/S0027133025700086
A. A. Markin, M. Yu. Sokolova, D. V. Khristich
{"title":"Il’yushin’s Particular Postulate and Nonlinear Relations for Anisotropic Bodies","authors":"A. A. Markin,&nbsp;M. Yu. Sokolova,&nbsp;D. V. Khristich","doi":"10.3103/S0027133025700086","DOIUrl":"10.3103/S0027133025700086","url":null,"abstract":"<p>A review of the works devoted to the theoretical study and experimental verification of one of the fundamental hypotheses of the theory of processes by A.A. Il’yushin, the particular postulate of isotropy, as well as the possibility of its generalization to initially anisotropic materials is fulfilled. A formulation of such a generalization is proposed using the concept of invariant subspaces of the symmetry group of an anisotropic material. As an example, within the framework of the proposed generalization, nonlinear constitutive relations for an elastic orthotropic material are constructed.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 1","pages":"23 - 32"},"PeriodicalIF":0.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Results of Experimental Studies of Creep and Long-Term Strength 蠕变与长期强度试验研究结果
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-06-04 DOI: 10.3103/S0027133025700062
V. V. Nazarov
{"title":"Results of Experimental Studies of Creep and Long-Term Strength","authors":"V. V. Nazarov","doi":"10.3103/S0027133025700062","DOIUrl":"10.3103/S0027133025700062","url":null,"abstract":"<p>The paper presents the current results of experimental studies of the creep properties of metallic materials and related processes. Uniaxial tension, the effect of aging and temperature on the strength of a welded joint, complex stress, and the effect of factors of chemical interaction of the environment on creep and creep rupture strength are considered. An equivalent stress is given that allows describing the difference in creep lifetimes under uniaxial tension and under equal multiaxial tension for the same value of the principal stress.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 1","pages":"1 - 10"},"PeriodicalIF":0.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Durability of Structural Materials under Variable Loading 结构材料在变载荷作用下的耐久性
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-06-04 DOI: 10.3103/S0027133025700074
E. B. Zavoichinskaya
{"title":"Durability of Structural Materials under Variable Loading","authors":"E. B. Zavoichinskaya","doi":"10.3103/S0027133025700074","DOIUrl":"10.3103/S0027133025700074","url":null,"abstract":"<p>The known physical and phenomenological approaches and failure criteria for structural materials at long-term and variable loading are systematized and their classification are proposed. The modern state of the durability problem is associated with the formulation of multilevel probabilistic models at complex loading, based on the physical laws of processes of brittle and viscous failure.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 1","pages":"11 - 22"},"PeriodicalIF":0.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wind Power Plants of Oscillatory Type 振荡型风力发电厂
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-06-04 DOI: 10.3103/S0027133025700098
Yu. D. Selyutskiy
{"title":"Wind Power Plants of Oscillatory Type","authors":"Yu. D. Selyutskiy","doi":"10.3103/S0027133025700098","DOIUrl":"10.3103/S0027133025700098","url":null,"abstract":"<p>Wind power generators of oscillatory type use the energy of flow induced vibrations of bodies to generate electricity. Numerous scientific publications are dedicated to development and analysis of various schemes and designs of such devices. The present paper contains a brief review of the literature on this issue.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 1","pages":"33 - 46"},"PeriodicalIF":0.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Main Research Directions of the Chair of Applied Mechanics and Control 应用力学与控制系主任主要研究方向
IF 0.7
Moscow University Mechanics Bulletin Pub Date : 2025-06-04 DOI: 10.3103/S0027133025700104
Yu. V. Bolotin, P. A. Kruchinin, S. S. Lemak
{"title":"Main Research Directions of the Chair of Applied Mechanics and Control","authors":"Yu. V. Bolotin,&nbsp;P. A. Kruchinin,&nbsp;S. S. Lemak","doi":"10.3103/S0027133025700104","DOIUrl":"10.3103/S0027133025700104","url":null,"abstract":"<p>The article is devoted to the review of scientific achievements of the staff of the Chair of Applied Mechanics and Control, the Laboratories of Control and Navigation and Mathematical Support of Simulation Dynamic Systems in the 21st century.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"80 1","pages":"47 - 52"},"PeriodicalIF":0.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flows of Thin Perfectly Rigid-Plastic Bodies: Dynamic Modes and Necking 薄型完全刚塑性体的流动：动力模式和颈缩
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2025-03-25 DOI: 10.3103/S0027133025700025
D. V. Georgievskii, I. M. Tsvetkov
{"title":"Flows of Thin Perfectly Rigid-Plastic Bodies: Dynamic Modes and Necking","authors":"D. V. Georgievskii,&nbsp;I. M. Tsvetkov","doi":"10.3103/S0027133025700025","DOIUrl":"10.3103/S0027133025700025","url":null,"abstract":"<p>The presented review consists of two parts. The first one is devoted to research generalizing the classical Prandtl problem in the case of taking into account the inertia of the convergence of rigid plates and dynamic effects occurring in a thin perfect rigid plastic layer. The second part examines the work related to the formation and development of the neck in plastic materials under quasi-static and dynamic loading. In particular, attention is paid to thin solids with a perturbed boundary shape, which have technological significance. The presence of a small geometric parameter allows using the asymptotic methods.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 6","pages":"190 - 199"},"PeriodicalIF":0.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Safety of Space Flights 太空飞行的安全
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2025-03-25 DOI: 10.3103/S0027133025700050
A. A. Shamina, A. V. Zvyagin, N. N. Smirnov, V. V. Tyurenkova, E. I. Skryleva
{"title":"Safety of Space Flights","authors":"A. A. Shamina,&nbsp;A. V. Zvyagin,&nbsp;N. N. Smirnov,&nbsp;V. V. Tyurenkova,&nbsp;E. I. Skryleva","doi":"10.3103/S0027133025700050","DOIUrl":"10.3103/S0027133025700050","url":null,"abstract":"<p>The safety of space flights is one of the topical issues. It combines a large number of different tasks. The Chair of Gas and Wave Dynamics presents several areas of work in this field. A study of cracks is proposed, because their appearance in the spacecraft skin can lead to an accident. A large number of experiments are being conducted on the ISS to refine mathematical models of media and processes, as well as the physical constants included in them. So, in emergency situations, fires may occur on the ISS. For their modeling, the cases of the presence of both one and several independent gross reactions describing the chemical interaction of an oxidizer with a fuel are considered. The results were compared with FLEX experiments on the combustion of single droplets in zero gravity. In order to refine the filtration models, experiments conducted under microgravity conditions have been studied.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 6","pages":"224 - 231"},"PeriodicalIF":0.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of Studies of the School of L.I. Sedov at the Chair of Hydromechanics 列-伊-塞多夫学校水力学教研室的发展情况
IF 0.3
Moscow University Mechanics Bulletin Pub Date : 2025-03-25 DOI: 10.3103/S0027133025700013
A. V. Aksenov, A. N. Golubyatnikov
{"title":"Development of Studies of the School of L.I. Sedov at the Chair of Hydromechanics","authors":"A. V. Aksenov,&nbsp;A. N. Golubyatnikov","doi":"10.3103/S0027133025700013","DOIUrl":"10.3103/S0027133025700013","url":null,"abstract":"<p>An overview of recent works in the field of gas dynamics and plasma dynamics, which were initiated by Academician L.I. Sedov and his descendants, is given. An analytical study of the equations was carried out, exact solutions were constructed, and the problem of energy-momentum concentration was solved. Higher invariants of characteristics for a system of equations of one-dimensional gas dynamics in Eulerian and Lagrangian variables for special adiabatic exponents are found. Based on the use of higher invariants of characteristics, the solution of the Cauchy problem is reduced to a system of ordinary differential equations. Two Cauchy problems are presented, the solutions of which exist indefinitely without a gradient catastrophe.</p>","PeriodicalId":710,"journal":{"name":"Moscow University Mechanics Bulletin","volume":"79 6","pages":"183 - 189"},"PeriodicalIF":0.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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