scholarly journals Effect of temperature fields and bottom sediments of oil products on the stress-strain state of the design of a vertical steel tank

2020 ◽  
Vol 1431 ◽  
pp. 012055
Author(s):  
R R Sultanbekov ◽  
R D Terekhin ◽  
M N Nazarova
Keyword(s):  
Bottom Sediments ◽  
Strain State ◽  
Oil Products ◽  
Temperature Fields ◽  
Effect Of Temperature ◽  
Stress Strain ◽  
Stress Strain State ◽  
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.

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 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.

Prediction of the kinetics of temperature fields and stress-strain state of dissimilar products, manufactured by layer-by-layer forming

2021 ◽  
Vol 2021 (1) ◽  
pp. 2-6
Author(s):  
O.V. Makhnenko ◽  
◽  
O.S. Milenin ◽  
O.A. Velykoivanenko ◽  
G.P. Rozynka ◽  
...  
Keyword(s):  
Strain State ◽  
Temperature Fields ◽  
Layer By Layer ◽  
Stress Strain ◽  
Stress Strain State ◽  
Kinetics Of

scholarly journals Modelling of temperature fields and stress-strain state of small 3D sample in its layer-by-layer forming

2017 ◽  
Vol 2017 (3) ◽  
pp. 11-19 ◽  
Author(s):  
O.V. Makhnenko ◽  
◽  
A.S. Milenin ◽  
E.A. Velikoivanenko ◽  
N.I. Pivtorak ◽  
...  
Keyword(s):  
Strain State ◽  
Temperature Fields ◽  
Layer By Layer ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals The influence of pressure changes on the integrity of tanks for storage of petroleum products and toxic substances

2021 ◽  
pp. 31-36
Author(s):  
Taras Hlova ◽  
Mykhailo Semerak ◽  
Bogdanna Hlova ◽  
Mykola Mykhailyshyn
Keyword(s):  
Cylindrical Surface ◽  
Strain State ◽  
Petroleum Products ◽  
Theory Of Elasticity ◽  
Oil Products ◽  
Thin Plates ◽  
Toxic Substances ◽  
Stress Strain ◽  
Stress Strain State ◽  
Analytical Expressions

Tanks for the storage of oil products and toxic substances in warehouses are the main ones. They can be in the form of separate tanks or a group of tanks. The most widespread are vertical steel tanks with a stationary roof that a placed in open areas. The tanks heat up, and the intensity of evaporation of the oil product increases in case of fire. If there is a permanent roof, the pressure in the tank will increase. If the capacity of the breathing valves is less than the intensity of evaporation then there is a risk of explosion. Explosions in the tank often lead to the separation of the bottom, and the side cylindrical surface and the roof fly away instantly, spilling oil on neighboring tanks and the territory of the tank’s park. Then the combustion area increases intensively. The destruction of the integrity of the tank, due to the separation of the bottom, contributes to temperature and power stresses, the value of which increases with increasing temperature of their heating and increasing pressure, respectively. The values of temperature stresses are added to the power stresses caused by pressure, and when the critical value is reached, destruction occurs. We investigated the stress-strain state of a steel vertical tank for the storage of oil products and toxic substances. The analysis of the reasons for the occurrence of admissible pressure in the tank, which is the reason for the loss of its integrity, is carried out. Using the differential equation of a closed cylindrical shell, which is under the action of internal pressure, analytical expressions are obtained to find deformations and stresses in the side cylindrical surface and bottom. Were calculated axial and annular stresses for the tank of RVS-900. Based on the basic relations of the theory of elasticity of thin plates and shells analytical expressions of the stress-strain state of the cylindrical tanks are obtained for conditions for changing of pressure on their structural elements. It is shown that the greatest values of axial stresses are obtained on the surface of the connection of the cylindrical surface with the bottom. The researches results are presented graphically.

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