scholarly journals Analysis of the stress-strain state of a tank in case of irregular subsidence along the periphery

2018 ◽  
Vol 239 ◽  
pp. 06005
Author(s):  
Petr Chepur ◽  
Aleksandr Tarasenko ◽  
Alesya Gruchenkova ◽  
Youhai Guan
Keyword(s):  
Influencing Factors ◽  
Strain State ◽  
Geometric Model ◽  
Calculation Model ◽  
Geometric Parameters ◽  
Stress Strain ◽  
Dimensionless Coefficient ◽  
Steel Tank ◽  
Horizontal Displacements ◽  
Bottom Contour

In the article, the authors proposed a calculation model for determining the SSS of a vertical steel tank in case of irregular subsidence of the external bottom contour in accordance with the geometric parameters of a real RVS-20000 m3 tank. An experiment is planned and presented including a scheme with two influencing factors: the geometric model of the tank and the value of the dimensionless coefficient m. The influencing factors have 3 and 5 combinations respectively, which is represented in the experiment matrix. The article shows diagrams of displacements, stresses of the tank structures, and graphically depicts the dependences of the displacements of shells on the values of subsidence zones. The presence of a stiffening ring and a stationary roof provides the least values for vertical and horizontal displacements. Conclusions about the influence of the factors considered on the SSS of a tank in case of irregular subsidence of the external bottom contour are presented.

Study of the Influence of Annular Plate Size on the Stress-Strain State of a Vertical Steel Tank

2021 ◽  
Author(s):  
A. E. Lebedev ◽  
A. B. Kapranova ◽  
I. S. Gudanov ◽  
D. S. Dolgin ◽  
A. A. Vatagin
Keyword(s):  
Strain State ◽  
Annular Plate ◽  
Stress Strain ◽  
Stress Strain State ◽  
Plate Size ◽  
Steel Tank

scholarly journals Influence of Residual Fuel Sediment on Stress-Strain State of a Vertical Steel Tank

2021 ◽  
Vol 134 (3) ◽  
pp. 60-64
Author(s):  
R. R. Sultanbekov ◽  
◽  
A. M. Schipachev ◽  
I. S. Leonov ◽  
◽  
...  
Keyword(s):  
Strain State ◽  
Branch Pipe ◽  
Oil Products ◽  
Temperature Fields ◽  
Stress Strain ◽  
Ambient Temperatures ◽  
Stress Strain State ◽  
Steel Tank ◽  
Total Sediment ◽  
Maximum Stresses

The article studies the formation of the total sediment by the incompatibility of residual fuels and oil products, analyzes and calculates the stress-strain state of the tank taking into account oil products and sediment. The studies examined the influence of temperature fields on the sedimentation of a mixture of residual fuels caused by the incompatibility of these components. Temperatures of a stored product, namely residual fuel RMK-700, and ambient temperatures are taken into account when modelling in ANSYS product. Effects that oil product has separately and oil product with bottom sediments have on a stress-stain state are compared. Laboratory tests were performed to accurately measure density depending on various temperatures. By means of finite element method a stress-stain state of a vertical steel tank RVS-20000 is examined, the calculations showed that the maximum stresses are located in zones of the weld seam and in the places of installation of the receiving-distributing branch pipe and manhole. In these areas bottom sediment and temperature difference influence the stress-stain state greatly, with the stresses becoming even higher as the wall gets thinner.

scholarly journals CONTROL OF ACTIONS OF STEEL TANK IN WORKING

2018 ◽  
Vol 22 (4) ◽  
pp. 66-74 ◽  
Author(s):  
A. A. Vasilkin
Keyword(s):  
Strain State ◽  
Low Cycle Fatigue ◽  
Operating Conditions ◽  
Maximum Effect ◽  
Safe Operation ◽  
Stress Strain ◽  
Load Bearing ◽  
Stress Strain State ◽  
Steel Tank ◽  
Steel Tanks

In steel tanks made by the method of rolling, defects of a geometric shape often occur in the area of the welded welded joint of the wall. Subsequently, in these areas, as a result of low cycle fatigue, an unacceptable defect appears in the form of a crack, which makes it necessary to remove the reservoir from operation and carry out a set of measures for its repair. To determine the terms of safe operation of vertical steel tanks with geometric defects, it is proposed to use the methodology control of the actions of structures of load-bearing structures, one of the directions of which is the regulation of the stress-strain state of steel structures. To implement the possibility of regulating construction, it is necessary to identify such parameters, the change of which will give the maximum effect in achieving the set goals. As the indicated parameters, the design characteristics (material properties, design scheme, geometric characteristics) and factors of external influences (load, operating conditions) can act. To regulate the stress-strain state design of vertical steel tanks, the following regulators are proposed: product loading height, wall deflection arrow and permissible number of tank loading cycles. By numerical calculation of the VAT of the vertical steel tank design with geometric defects, the necessary values and values of the stress state are determined. Further, using known analytical dependencies from the field of fracture mechanics, it is possible to determine the permissible number of loading cycles of the reservoir before the appearance of a crack-like defect. The application of the methodology control of the actions of structures load-bearing structures, by means of a certain change in the established control parameters, allows increasing the number of loading cycles of the reservoir, thereby increasing the period of safe operation of the defective reservoir and thereby increasing the economic efficiency of the tank farm.

Effect of geometric parameters of parts on stress-strain state in contact zones during their welding

2021 ◽  
pp. 392-395
Author(s):  
M.V. Semenozhenkov ◽  
V.S. Semenozhenkov
Keyword(s):  
Strain State ◽  
Geometric Parameters ◽  
Stress Strain ◽  
Contact Zones ◽  
Contact Areas ◽  
Stress Strain State

The conditions for the effect of geometric parameters of parts on the formation of the stress-strain state in contact areas during welding are established. The justifications in the need to use technological sheet for transferring of process load and recommendations for selecting of the ratio of the parts dimensions in which there is no possibility of joints opening when they are compressed are presented.

scholarly journals On the question of determining the deformed state of an anisotropic nonlinear inhomogeneous pipe

2020 ◽  
pp. 97-107
Author(s):  
Борис Гурьевич Миронов ◽  
Андрей Витальевич Никитин
Keyword(s):  
Radiation Exposure ◽  
Yield Stress ◽  
Influencing Factors ◽  
Strain State ◽  
Modern World ◽  
Stress Strain ◽  
Material Inhomogeneity ◽  
Material Heterogeneity ◽  
Deformed State ◽  
Temperature Radiation

Рассматривается деформированное состояние анизотропной нелинейно-неоднородной трубы. Примем неоднородность материала как зависимость предела текучести от координат. На неоднородность материала способны влиять различные факторы, такие как: ударные воздействия, температура, радиационное облучение и другие. Вдоль эллиптических кривых предел текучести считается неизменным. Результаты, учитывающие влияние анизотропии на напряженно-деформированное состояние различных конструкций и тел являются востребованными в современном мире. The deformed state of an anisotropic nonlinear inhomogeneous pipe is considered. Let us take the material inhomogeneity as the dependence of the yield stress on coordinates. For material heterogeneity are capable of influencing factors such as: shock effects, temperature, radiation exposure and others. Along the elliptical curves, the yield stress is assumed to be constant. Results taking into account the effect of anisotropy on stress-strain state of various structures and physicality in demand in the modern world.

scholarly journals ENGINEERING METHOD FOR SELECTION OF RATIONAL GEOMETRIC PARAMETERS OF MEMBRANE DRIVE OF THE MECHATRONIC SYSTEMS BASED ON STRESS-STRAIN STATE RESEARCH

2018 ◽  
Vol 0 (3(80)) ◽  
Author(s):  
Юрій Олексадрович Цибрій ◽  
Георгій Геннадійович Грабовський ◽  
Павло Леонідович Носко ◽  
Олександр Васильович Башта ◽  
Світлана Володимирівна Федорчук ◽  
...  
Keyword(s):  
Strain State ◽  
Geometric Parameters ◽  
Engineering Method ◽  
Mechatronic Systems ◽  
Stress Strain ◽  
Stress Strain State ◽  
State Research ◽  
Selection Of

Assessment of the Stress-Strain State of a Tube Sheet of the Heat Exchanger at Rotary Friction Welding Application

2020 ◽  
Vol 991 ◽  
pp. 70-76
Author(s):  
Andrey Sergeevich Tokarev ◽  
Denis Vladimirovich Karetnikov ◽  
Rif Garifovich Rizvanov ◽  
Ayrat Minnulovich Fayrushin ◽  
Mars Zul'fatovich Zaripov
Keyword(s):  
Friction Welding ◽  
Strain State ◽  
Geometric Model ◽  
Tube Sheet ◽  
Special Equipment ◽  
Stress Strain ◽  
Element Analysis ◽  
Stress Strain State ◽  
Rotary Friction Welding ◽  
State Models

The aim of the study described in this paper is to assess the effect of forces acting on the tube sheet during friction welding on the stress-strain state of the tube sheet.For this, we calculated the stresses and displacements arising in the tube sheet during friction welding. The calculations were carried out in the ANSYS (finite element analysis software package). To carry out the calculations, solid-state models of tube sheets with diameters of 400, 600, 800, 1000, 1200, 1400 mm and thicknesses of 30, 40, 50, 60, 70 mm were created. The diameter of the holes for the heat exchange tubes was chosen equal to 25 mm, the holes are placed on the vertices of an equilateral triangle with a step equal to 32 mm. Then, based on geometric models, grids of 8-node finite elements were created. The calculation model takes into account the symmetry of the geometric model and the character of loading relative to the YZ and XZ planes. The material used was steel with a Poisson's ratio of 0.3 and an elastic modulus of 2,11·105 MPa.As a result of the calculations, it was found that as a result of the action of force factors during friction welding, significant stresses and deformations arise in the tube sheet. The greatest values of deflection and stresses occur in the central sector of the tube sheet in the area of application of force. In this case, the zone of maximum stresses is significantly localized: they are concentrated around the central hole, and movements smoothly increase from the periphery to the center of the tube sheet.The value of this study is that it allowed to determine the need to use special equipment that increases the local stiffness of the tube sheet sector subjected to friction welding.

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