SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This paper examines how commutating and eddy currents affect the magnetomotive force of the control winding in cross-field electric-machine amplifiers. Using an experimental method that accounts for magnetic asymmetry, brush displacement, and equality of transverse fluxes, the authors test three amp…
This paper examines impact generators as electromechanical energy stores for pulsed power applications, comparing their specific energy with capacitor, inductive, and flywheel storage. Using machine constants, reactance parameters, and rotor geometry, it derives expressions for the electromagnetic e…
This paper examines the calculation of direct- and quadrature-axis reactances in synchronous reluctance motors and argues that some published methods incorrectly substitute armature-reaction coefficients for field-form coefficients. Treating the reluctance motor as a special case of a salient-pole s…
This paper investigates self-excited speed, current, and voltage oscillations in a synchronous reluctance motor supplied by a regulated generator, a problem observed in practical low-power drive systems. The generator and motor are reduced to an equivalent circuit with constant supply voltage and ad…
This paper critiques published comparisons of synchronous reluctance motors with induction and synchronous motors, arguing that earlier analyses used parameter assumptions that lead to unrealistic current and power estimates. Using equivalent circuit relations and simplified power expressions, it re…
This paper studies the space of continuous curves in a metric space, understood as equivalence classes of continuous mappings of the unit interval under nondecreasing reparametrizations. It proves a synchronization theorem for such reparametrizations and uses it to define and analyze a metric on the…
This note studies an operation on continuous curves in Euclidean space that replaces selected open subintervals of a parametrization by the corresponding straight line segments between their endpoint values. Using the characteristic of a continuous function, expressed through maximal delta partition…
This paper studies sequences in the class of continuous nondecreasing functions on the unit interval normalized by the endpoint values 0 and 1. After proving auxiliary results on pointwise limits at continuity points and on uniform convergence under composition, it establishes a subsequence selectio…
This paper studies extremal estimates for the number of triangles covering a point in a finite planar point system, expressed as a function of the point’s depth. By introducing an ordering of points on the two sides of a directed line through the point, the covering count is reduced to an optimizati…
The paper studies finite point systems through counts of convex and nonconvex quadruples and introduces the filling coefficient, defined as the proportion of nonconvex quadruples among all quadruples. It proves a parity result for the number of convex quadruples when the number of points is odd, and…
This paper examines finite point systems through matrices of sections and properties of the associated order function. It proves that the section matrix uniquely determines a point system up to equivalence, and extends this uniqueness result to systems whose points have unknown positive weights. The…
The paper introduces the depth of a point in a finite planar point system, defined by the minimum number of system points on either side of a line through that point and another system point. It proves several structural properties of depth, including inequalities for points lying in one section, be…
This paper proposes an axiomatic treatment of finite point systems abstracted from finite point sets in the Euclidean plane with no three collinear points. It introduces a binary cyclic function and the associated order function that determines left and right divisions by pairs of points, then studi…
This paper develops general methods for solving fundamental geodetic computation problems on the terrestrial spheroid in geodetic coordinates. It reformulates geodesic curves as “leveled” surface threads, sets out notation for latitudes, longitudes, azimuths, vertices, equator crossings, and coordin…
The paper develops continued fraction methods for approximating integrals of the form \(\int_x^\infty t^{\gamma-1}e^{-ct}\,dt\), where \(c=a+bi\), \(a>0\), \(b>0\), and \(0\leq\gamma<1\). Starting from repeated integration by parts, it converts the resulting asymptotic series into a continued fracti…
This paper develops a method for evaluating integrals of binomial differentials by using continued fraction approximations to the hypergeometric function. Starting from Markov’s continued fraction for \(F(\alpha,1;\gamma;-z)\), it derives explicit formulas for the numerator and denominator polynomia…
This paper studies the extraction of algebraic parts from integrals of binomial differentials by expressing them through the hypergeometric function F(alpha, 1; gamma; z). It derives and proves several recurrence and expansion relations for this function, then applies them to obtain reduction formul…
This paper analyzes diurnal and seasonal variations in hourly meteor counts using radar observations from Tomsk and comparative data from stations in New Zealand, Canada, and Antarctica. Through harmonic analysis of annual mean diurnal curves and a formal definition of a meteor activity index based …
This paper investigates why pneumatic drilling hammers mounted on the KTsM-4 screw feeder show lower drilling speeds than the same hammers with piston feeders, despite the screw feeder’s simpler and more convenient design. The study directly measured the traction characteristics of the KTsM-4 feeder…
The paper examines three schemes for producing reciprocating striker motion in electromagnetic impact machines, including spring return, two electromagnets, and a single electromagnet with free striker runout. Using simplifying assumptions about losses and impact behavior, it derives conditions for …
The paper addresses the calculation of lateral magnetic reluctance in electromagnetic hammers with free striker travel, where large variations in the working air gap cause significant redistribution of magnetic flux. It argues that lateral leakage flux through the outer pole surface forms a substant…
The paper examines how to determine the dynamic tractive force of an operating electromagnet when eddy currents and unknown resistance forces make direct calculation uncertain. It analyzes the relation between static and dynamic inductance, argues that static inductance can represent transient elect…
This paper examines how the number of coil turns affects the operating mode of a UE-1 electromagnetic impact unit. Starting from the electrical equilibrium equation, the authors relate coil turns to current, magnetic permeance, striker velocity, transformation emf, and motion emf, and argue that an …
This paper examines how striker material and design affect losses and efficiency in electromagnetic solenoid hammers with free striker travel. Using experimental measurements of consumed power, copper losses, and striker steel losses under pulsating current, the authors compare several steels, cast …
This paper examines the development of electric rotary-percussive drilling machines for mining applications where pneumatic equipment is impractical. It compares electromechanical and electromagnetic percussion units, then reports experimental work on a single-coil electromagnetic impact unit with f…
This paper reports experimental studies of representative electromagnetic hammers, focusing on AEG, Sintron, and MS-15 designs as examples of different methods for producing reciprocating striker motion. Using oscillograms and comparative technical data, the authors analyze power-supply circuits, co…
The paper analyzes energy conversion in electromagnets intended for reciprocating mechanisms, especially solenoid hammers, where mechanical output is significant enough to require fuller treatment than in relays or contactors. Under simplifying assumptions of an unsaturated magnetic circuit and negl…
This paper examines disputed methods for calculating the traction force of electromagnets, especially the conditions under which force may be obtained by differentiating magnetic energy with respect to armature displacement. Using energy balance arguments and graphical magnetic characteristics, the …
This paper generalizes experimental findings on rotary drilling of blastholes in rocks of varying strength, with the aim of selecting rational drilling regimes and estimating drilling performance. Using published data and the authors’ experimental work, it relates drilling rate to feed force, bit ro…
This paper reports laboratory testing of the BU-1 rotary percussion drilling machine to determine actual operating parameters, compare them with specifications, and identify improvements. Separate stand tests of the feed mechanism, rotary unit, and percussion assembly measured feed force and speed, …
This paper evaluates the vibration characteristics of Tomsk Electromechanical Plant chipping and riveting pneumatic hammers in relation to contemporary sanitary standards. Using experimental amplitude, frequency, pressing force, air pressure, and work-material data, the authors distinguish several o…
This paper examines how the pressing force applied to hand-held pneumatic hammers affects stable operation, energy transfer to the tool, and vibration evaluation. Using force diagrams, impulse relations, and experimental pressure data for riveting, chipping, breaker, and drilling hammers, it decompo…
The article presents a graphical calculation method for selecting the main parameters of pneumatic chipping and riveting hammers. Using established relationships for impact energy, blow frequency, and impact power, the authors construct a four-quadrant nomogram based on design stroke, striker mass, …
This paper examines the fragmented design and production of pneumatic chipping and riveting hammers used in Soviet metallurgical and machine-building enterprises. Drawing on a survey of more than 5,000 hammers at 26 enterprises, the authors identify widespread local manufacture, poor interchangeabil…
This paper reports experimental studies of serial KE-type riveting hammers that were increasingly being used as chipping hammers despite design features unsuited to that role. Using test-stand measurements of chamber pressures, spool-valve motion, striker displacement, and operating parameters, it a…
The paper addresses the insufficient experimental study of pneumatic chipping and riveting hammers, especially under conditions reflecting actual work rather than standardized laboratory testing. It describes a test stand that permits controlled variation of air pressure, pressing force, hammer orie…
This paper applies similarity theory and dimensional analysis to the selection of basic motor vehicle parameters, a domain in which the authors argue such methods had not been widely used. It derives scaling relations for length, mass, velocity, rotational speed, power, work, and load, then compares…
This paper considers the design prospects of large-wheeled amphibious all-terrain vehicles for transporting heavy and oversized loads in remote regions with little or no prepared infrastructure. It argues that very large wheels, despite increasing vehicle mass, could reduce ground pressure, improve …
The article presents the design rationale and main characteristics of the 2BTDT two-bar earth-cutting machine, developed to reduce maneuvering operations when preparing frozen ground for excavation. Drawing on operating experience and calculations for the URMG-60 single-bar installation, it estimate…
The paper reviews methods and equipment for loosening and excavating frozen ground using wedge-shaped drop hammers, ball hammers, and tractor-mounted impact frost rippers. Drawing on reported designs, operating practices, and productivity data from construction organizations, it compares hammer geom…
This paper discusses the problem of constructing drainage ditches in extensive bogged areas of Tomsk Oblast, where summer access is difficult and manual preparation for explosive ditching is labor intensive. The authors describe winter experiments in which bar-type earth-cutting machines, including …
This paper examines wear of chain cutting tools used by bar-type earth-cutting machines for frozen soils, addressing the rapid consumption of teeth and chains that limits their practical use. Based on field observations with BETU, Moroz, and BETN machines and comparisons of several tooth designs, th…
This paper reports field experiments on operating modes for bar-type machines cutting frozen soils, using the experimental “Moroz” installation near Tomsk in winter conditions. The study varies cutting-chain speed and feed rate over wide ranges and analyzes their effects on chip depth, cutter pullin…
This paper presents a methodology for experimentally studying soil cutting regimes of bar type earth cutting machines, with emphasis on frozen soils and on the comparability of productivity and power data. It describes the “Moroz” experimental installation based on an ETV-353 trench excavator, its v…
The article examines the conversion of trench excavators into bar-type earth-cutting machines for winter construction, especially for cutting and loosening frozen soils where conventional trench excavators otherwise stand idle. Drawing on practical design and operating experience at Tomsk Polytechni…
This paper argues against the view that the Pacific Ocean is extraordinarily ancient and proposes that at least its southern part replaced a Mesozoic continent that persisted into the Late Cretaceous. Drawing on sediment thickness, paleobiogeographic evidence, shallow-water faunas, ocean-floor struc…
The paper addresses determination of aquifer physical parameters from transient well recovery data after pumping cessation, emphasizing the value of unsteady-regime observations over core-based estimates. It applies E. B. Chekalyuk’s integral method to water-bearing formations and proposes a related…
This article addresses methodological errors in calculating cost savings from organizational and technical measures in geological exploration operations. It argues that cost reduction plans should be based on specific measures with separately calculated economic effects, rather than on past reportin…
This paper describes the PBU-15, a lightweight portable drilling rig developed for shallow geological, engineering-geological, mapping, and emanation-survey boreholes in difficult terrain. It addresses the need for equipment capable of drilling to about 15 m in varied materials while obtaining accep…
This paper examines methods for identifying the moment when exploratory drilling encounters coal seams in Kuzbass deposits, where weak and complex coals make core recovery and seam-boundary determination unreliable. Drawing on field observations from several geological exploration parties and labora…
