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Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep Authors: Hudramovych V. Hudramovych V. Hudramovych V. L., Hudramovych V. Vysokoproizvoditelnaia vychislitelnaia sistema dlia raschetnykh zadach GP KB “Yuzhnoye”. Degtyareva. Hudramovych V. Amsterdam, Lousanne, New York, Tokyo, 1999. Fatigue and durability of structural materials. Space technology. Space technology. Hudramovych V. Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep Автори: Hudramovych V. Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep Автори: Hudramovych V.
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5. Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep

Authors:

Hudramovych V. S.2, Sirenko V. M.1, Klimenko D. V.1, Hart Ye. L.3

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine1; The Institute of Technical Mechanics, Dnipro, Ukraine2; Oles Honchar Dnipro National University, Dnipro, Ukraine3

Page: Kosm. teh. Raket. vooruž. 2020, (1); 44-56

DOI: https://doi.org/10.33136/stma2020.01.044

Language: Russian

Annotation: The shell structures widely used in space rocket hardware feature, along with decided advantage in the form of optimal combination of mass and strength, inhomogeneities of different nature: structural (different thicknesses, availability of reinforcements, cuts-holes et al.) and technological (presence of defects arising in manufacturing process or during storage, transportation and unforseen thermomechanical effects). The above factors are concentrators of stress and strain state and can lead to early destruction of structural elements. Their different parts are deformed according to their program and are characterized by different levels of stress and strain state. Taking into consideration plasticity and creeping of material, to determine stress and strain state, the approach is effective where the calculation is divided into phases; in each phase the parameters are entered that characterize the deformations of plasticity and creeping: additional loads in the equations of equilibrium or in boundary conditions, additional deformations or variable parameters of elasticity (elasticity modulus and Poisson ratio). Then the schemes of successive approximations are constructed: in each phase, the problem of elasticity theory is solved with entering of the above parameters. The problems of determining the lifetime of space launch vehicles and launching facilities should be noted separately, as it is connected with damages that arise at alternating-sign thermomechanical loads of high intensity. The main approach in lifetime determination is one that is based on the theory of low-cycle and high-cycle fatigue. Plasticity and creeping of material are the fundamental factors in lifetime substantiation. The article deals with various aspects of solving the problem of strength and stability of space rocket objects with consideration for the impact of plasticity and creeping deformations.

Key words: shell structures, stress and strain state, structural and technological inhomogeneity, thermomechanical loads, low-cycle and high-cycle fatigue, lifetime

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5.1.2020 Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep
5.1.2020 Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep
5.1.2020 Strength and stability of inhomogeneous structures of space technology, consid-ering plasticity and creep

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]]> 6.1.2018 On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction https://journal.yuzhnoye.com/content_2018_1-en/annot_6_1_2018-en/ Tue, 05 Sep 2023 06:19:12 +0000 https://journal.yuzhnoye.com/?page_id=30454
On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction Authors: Degtyareva O. Content 2018 (1) Downloads: 20 Abstract views: 342 Dynamics of article downloads Dynamics of abstract views Downloads geography Country City Downloads USA Baltimore; Plano; Monroe; Ashburn; Seattle; Ashburn; Seattle; Portland; San Mateo; San Mateo; Boardman 11 Singapore Singapore; Singapore; Singapore; Singapore; Singapore; Singapore; Singapore; Singapore 8 Ukraine Dnipro 1 Downloads, views for all articles Articles, downloads, views by all authors Articles for all companies Geography of downloads articles Degtyareva O. Degtyareva O. On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction Автори: Degtyareva O. On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction Автори: Degtyareva O.
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6. On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction

Authors:

Degtyareva O. А., Lapko O. M., Meleshko A. O., Chucha Y. V.

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine

Page: Kosm. teh. Raket. vooruž. 2018 (1); 31-38

DOI: https://doi.org/10.33136/stma2018.01.031

Language: Russian

Annotation: The paper deals with the options of solving the task of constructing an inertial navigation system in the conditions of considerable g-load and angular velocity in identified direction by method of setting the sensitive elements at some angle to the identified direction, which allows making measurements in it without loss of measurement quality in the other directions. The paper describes the technique of calculating the angle of sensitive elements setting to the identified direction. The scheme of constructing an inertial navigation system with incomplete set of sensitive elements is considered for the cases when in entire operation leg, rotation around the identified direction is executed. The analysis is given of measurement vector error due to incompleteness of the sensitive elements set.

Key words:

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6.1.2018 On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction
6.1.2018 On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction
6.1.2018 On Building of Inertial Navigation System in the Condition of Presence of Considerable g-Load and Angular Velocity in Preferential Direction
]]> 17.1.2017 Peculiarities of Design and Development Test of Dispenser Turning Actuator System for SHM with Iridium NEXT SC https://journal.yuzhnoye.com/content_2017_1/annot_17_1_2017-en/ Wed, 28 Jun 2023 12:10:36 +0000 https://journal.yuzhnoye.com/?page_id=29518
, Degtyareva O. S., Degtyareva O. S., Degtyareva O. S., Degtyareva O. S., Degtyareva O. S., Degtyareva O. S., Degtyareva O.
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17. Peculiarities of Design and Development Test of Dispenser Turning Actuator System for SHM with Iridium NEXT SC

Authors:

Zhilenkova N. M., Kholoshnya I. S., Degtyareva O. Y., Babich I. P.

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine

Page: Kosm. teh. Raket. vooruž. 2017 (1); 107-110

Language: Russian

Annotation: The article presents briefly the peculiarities of designing and ground development testing of dispensers turn drive system, the system composition and functioning principle are described.

Key words:

Bibliography:
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3. Gontarovsky V. A., Makarenko A. A., Shevtsov E. I. Role and Place of Functional Tests in Development of Strategic Missile Systems. Space Technology. Missile Armaments: Collection of Scientific-technical articles. 2014. Issue 1. 164 p.

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17.1.2017 Peculiarities of Design and Development Test of Dispenser Turning Actuator System for SHM with Iridium NEXT SC
17.1.2017 Peculiarities of Design and Development Test of Dispenser Turning Actuator System for SHM with Iridium NEXT SC
17.1.2017 Peculiarities of Design and Development Test of Dispenser Turning Actuator System for SHM with Iridium NEXT SC
]]> 4.2.2019 Numerical simulation of behavior of elastic structures with local stiffening elementse https://journal.yuzhnoye.com/content_2019_2-en/annot_4_2_2019-en/ Mon, 15 May 2023 15:45:37 +0000 https://journal.yuzhnoye.com/?page_id=27206
Perspektivy sotrudnichestva NAN Ukrainy, NAN Belarusi i Yuzhnoye SDO dlya resheniya problemnykh voprosov kosmicheskoy otrasli. Degtyareva. N., Lobodyuk V. Amsterdam/ New York / Tokyo, 1999. Content 2019 (2) Downloads: 17 Abstract views: 274 Dynamics of article downloads Dynamics of abstract views Downloads geography Country City Downloads USA Boardman; Baltimore; North Bergen; Plano; Columbus; Los Angeles; Monroe; Ashburn; Seattle; San Mateo; Boardman; Ashburn 12 Singapore Singapore; Singapore; Singapore; Singapore 4 Ukraine Dnipro 1 Downloads, views for all articles Articles, downloads, views by all authors Articles for all companies Geography of downloads articles Hudramovych V. Space technology. Space technology.
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4. Numerical simulation of behavior of elastic structures with local stiffening elements

Authors:

Hudramovych V. S.1, Hart Ye. L.3, Strunin K. A.2

Organization:

The Institute of Technical Mechanics, Dnipro, Ukraine1; Yangel Yuzhnoye State Design Office, Dnipro, Ukraine2; Oles Honchar Dnipro National University, Dnipro, Ukraine3

Page: Kosm. teh. Raket. vooruž. 2019, (2); 25-34

DOI: https://doi.org/10.33136/stma2019.02.025

Language: Russian

Annotation: Availability of different inclusions, stiffenings, discontinuities (holes, voids and flaws) are the factors that cause structural irregularity and are typical for structural elements and buildings from various current technology areas, in particular aerospace technology. They significantly influence the deformation processes and result in stress concentration, which can cause local damages or malconformations and as a result lead to impossibility to further use the structure. Materials used are also heterogeneous in its structure. Inclusions can simulate thin stiffening elements, straps, welded or glue joints. It is necessary to detect the thin inclusions when phase transformations of materials are studied, for example, when martensite structures are formed. Study of the various bodies with inclusions is very important in the powder technology, ceramics, etc., where powder, previously compressed under high pressure, is sintered at high temperatures. Use of surface hardening that increases working efficiency of the structural elements is prospective in many engineering sectors. It is important to develop discrete hardening, implemented through manufacturing schemes of particular type. When discrete hardenings impact on the structural elements mode of deformation is simulated, they can also be considered as inclusions of specific structure. Inclusions can also simulate banding of the ferritic-pearlitic structure in the microstructure, related to the complex preloading under material plastic forming. It is advisable to use numerical methods for studies that are universal and suitable for objects of various shapes, sizes and types of loading. Main numerical methods are finite difference method, boundary element method, variation grid-based method, finite element method, method of local variations. This article features ANSYS – based computer simulation of the aerospace structural element behavior – a rectangular plate with two extended elastic inclusions of different rigidity, simulating elastic heterogeneities of structures and materials.

Key words: finite-element method, strength, inclusions, computer simulation

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4.2.2019 Numerical simulation of behavior of elastic structures with local stiffening elementse
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]]> 9.1.2023 Methodology for selecting design parameters of solid-propellant sustainer engines. Mathematical support and software https://journal.yuzhnoye.com/content_2023_1-en/annot_9_1_2023-en/ Fri, 12 May 2023 16:11:14 +0000 https://test8.yuzhnoye.com/?page_id=26993
Mathematical support and software Authors: Yenotov V. The main types of mathematical models, their areas of application have been considered as a part of the analysis. Ballisticheskoe proektirovanie raket: ucheb.-metod, posobie dlya vuzov. Nikolaev Yu. M., Solomonov Yu. S., Pustovgarova Ye. I., Pustovgarova Ye. I., Pustovgarova Ye. Degtyareva. GP «KB «Yuzhnoye». GP «KB «Yuzhnoye». Space technology. Space technology. Yenotov V. Space technology. Mathematical support and software Автори: Yenotov V. Space technology. Mathematical support and software Автори: Yenotov V. Space technology. Mathematical support and software Автори: Yenotov V. Space technology. Mathematical support and software Автори: Yenotov V. Space technology.
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9. Methodology for selecting design parameters of solid-propellant sustainer engines. Mathematical support and software

Authors:

Yenotov V. H., Kushnir B. I., Pustovharova O. V., Chubarov A. M.

Organization:

Yangel Yuzhnoye State Design Office, Dnipro, Ukraine

Page: Kosm. teh. Raket. vooruž. 2023 (1); 77-87

DOI: https://doi.org/10.33136/stma2023.01.077

Language: Ukrainian

Annotation: Substantiation of the research tools has been performed as a part of methodology development for the air and missile defense system. The problem under consideration is very complex due to the multifactorial nature of the research object, its qualitative variety and manifold structure, incomplete definition of the problem statement. Furthermore, the ability of modern technologies to produce different arms systems, which are capable of carrying out same class tasks, considerably increases the risk of making not the best decisions. Based on this, as well as taking into account the sharp increase in the cost of weaponry, the considered problem is classified as an optimization one that should be solved through the theory of operations research. In this theory, such task is viewed as a mathematical problem, and mathematical simulation is the basic method of research. The main types of mathematical models, their areas of application have been considered as a part of the analysis. The classification of mathematical models has been indicated according to the scale of reproduced operations, purpose, and goal orientation. Quantitative and qualitative correlation of forces has been accepted as the efficiency criterion, which determines a goal orientation of the model. The problems related to this have been shown. In particular, searching for the compromise between simplicity of the mathematical model and its adequacy to the research object is among these problems. Two of the basic approaches to principles of the military operation model construction and its assessment have been considered. The first is implemented through modeling of the combat operations. The second approach is based on the assumption that different armament types can be compared based on their contribution to the outcome of the operation, and on the possibility to assign «a weighting coefficient» named as a combat potential to each of these types. The modern level of problem solving related to this method has been shown. The reasonability of its application in the considered task, including the definition of forces correlation of the opposing parties, has been substantiated. The basic regulations of the construction concept of the required mathematical model and tools for its research have been formulated based on the analysis results: the assigned problem should be solved by analytical methods through the theory of operations research; the analytical model is the most acceptable conception of the analyzed level of the military operation; the synthesis of the model should be based on the idea of a combat potential. At the same time, it should be taken into account that the known approach to the definition of forces correlation, which uses the combat potential method, has a number of essential limitations, including the methodological ones. Therefore, within the bounds of further research, this approach requires the development both in terms of improving the reliability of the single assessment and in terms of giving the system qualities to the synthesized mathematical model.

Key words: multifunctional system, mathematical model, military unit, combat potential, correlation of forces, defensive sufficiency

Bibliography:

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9.1.2023 Methodology for selecting design parameters of solid-propellant sustainer engines. Mathematical support and software
9.1.2023 Methodology for selecting design parameters of solid-propellant sustainer engines. Mathematical support and software
9.1.2023 Methodology for selecting design parameters of solid-propellant sustainer engines. Mathematical support and software

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