Industrial University of Tyumen (IUT) (before 7 April 2016 – Tyumen State Oil and Gas University and Tyumen State University of Architecture and Civil Engineering) is a higher education institution in Tyumen. One of the regional basic universities.IUT provides all levels of education: from secondary general, secondary vocational and higher education, to doctoral studies and business education programs. Studies are held in 25 large groups of areas of training and specialties and in more than 150 educational programs. The number of students is 32,530 people, including 1,500 thousand students from CIS and non-CIS states.The IUT research group includes 225 higher doctorate and professors, 787 candidates of sciences, associate professors. Among them there are 3 academicians, 4c corresponding members of the Russian Academy of Sciences and more than 100 full members and corresponding members of the academies of sciences, a Lenin Prize laureate, 3 State prize laureates, 7 Honoured master of sciences and engineering of the Russian Federation.The rector of IUT is Veronika Efremova, as of 20 September 2020.
Final reaming of the bushes in drill pump components with an inverse hardness distribution over the thickness is considered. The conditions for the stability of vibrational processes in machining are determined.
This paper presents a numerical investigation into the vortex-induced vibrations (VIV) of a smooth and a marine-fouled circular cylinder with two degrees of freedom (2DOF), subjected to a turbulent oscillatory flow. The study aims to elucidate the critical influence of the Keulegan-Carpenter (KC) number of 5, 10, and 15 on the vibration response, lock-in regime, frequency synchronization, trajectory patterns and vorticity. Simulations are performed by solving the two-dimensional unsteady Reynolds-Averaged Navier–Stokes (RANS) equations with the Shear Stress Transport (SST) k-ω turbulence model in ANSYS Fluent 2025 R1. An increase in the KC number leads to a significant broadening of the lock-in region, an increase in maximum vibration amplitudes and their emergence at higher reduced velocities. Another key finding is the consistent suppressive effect of biofouling on cross-flow vibrations. The biofouled cylinder exhibits lower cross-flow amplitudes across all KC numbers compared to the smooth cylinder, almost plateauing at around 1.0D for KC = 10 and 15, while the smooth cylinder reaches amplitudes of up to 1.8D and a maximum in-line amplitude of 4.46D. These findings have critical implications for the realistic fatigue life assessment and design of offshore marine structures, highlighting the necessity of incorporating surface roughness effects into VIV prediction models.
BACKGROUND: In drives of high-power machines with cantilever arrangement of cylindrical gears, their teeth work in conditions of inevitable crossing angle arising both due to manufacturing errors and deformations of drive elements. The presence of crossing angle leads to edge contact of straight, helical, and double helical teeth and multiple reduction of load capacity and durability of gears. Cylindrical gears with arc teeth capable of self-aligning can ensure the required operability and service life of gears under conditions of torque and crossing angle change according to the laws of random values. To evaluate the efficiency of application of these gears in the drives of modern machines, it is necessary to have data on the contact stress of arc teeth in the conditions of gear axes crossing. . AIM: Development of the mathematical model for determining the law of load distribution at the contact area in the meshing of arc teeth, taking into account the geometrical features of their meshing in the conditions of the gear axes crossing, the final dimensions of the teeth and their bending-sliding deformations, the possibility of ‘exit’ of the contact area on one or both ends of a tooth. METHODS: The built mathematical model is based on the solution in the volumetric formulation of the contact problem of interaction of a pair of arc teeth of finite dimensions taking into account their deformations and the function of gaps around the point of contact. RESULTS: Dependences for implementation of the procedure of determining the pattern of stresses distribution over the contact area in the process of iterative solution of the singular integral equation taking into account the equilibrium equation are obtained and presented. The results of calculation of the geometrical parameters of the contact area, specific load and contact stress distributed on it for in the meshing of arc teeth of the tractor’s axle drive at variation of crossing angle are considered. . CONCLUSION: The developed method of evaluation of tooth contact loading and the software implementing it allow carrying out comparative analysis of contact strength in given operating conditions of gears with arc teeth, including self-aligning ones, in comparison with gears with straight and barrel-shaped teeth, and performing the procedure of synthesis of gears geometry with arc teeth according to the contact strength criterion.
This article analyzes how religious values pass from one generation to another in contemporary Russian families. This topic is relevant because there is contradiction between a religious identity declared by youth, and low level of real churchedness. At the same time, the older generation holds a special role as a carrier of religious tradition, since it lived through a long period of state atheism. Relying on the theoretical propositions of K. Mannheim and on empirical studies by D.A. Tikhomirova, V.I. Pishchik, the authors ground the hypothesis of a “broken transmission”. According to this hypothesis, the secular Soviet past changed the order of transfer of religious values, and now they are transferred not directly from parents (the “fathers” generation), but through grandparents (from “grandparents” to “grandchildren”). Using comparative analysis of generational characteristics and empirical data, the authors found that the lack of direct continuity between parents and children leads to several outcomes: formalized religiosity, syncretic beliefs, and non-confessional spirituality. The article concludes that specific aspects of this “broken transmission” must be considered in family upbringing, school education, and social service.
This article explores approaches for optimizing the performance of the reformate stabilizer within a catalytic reforming unit. This study aims to minimize the loss of gasoline-range hydrocarbons in the distillate while ensuring the required quality of the final product, stable reformate. The authors modeled the stabilization process in Aspen HYSYS and evaluated the influence of the main parameters: reflux rate, column temperature profile, and possible design modifications on product quality. The researchers also performed a hydraulic analysis and determined the hydraulic capacity limit of the column. The study demonstrates how the key product specifications change under different operating conditions. Authors also evaluate the additional operating costs associated with higher reflux rates. The article considers an increase in the number of trays and the replacement of trays with packings. The authors analyzed several options to ensure product quality. To limit high-boiling hydrocarbons in the distillate and control the Reid Vapor Pressure of the reformate, they suggest two solutions. The first solution involves optimizing the temperature regime in the lower part of the column. The second solution requires replacing the trays with structured packed beds.
