Estimating the stressed-strained state of the vertical mounting joint of the cylindrical tank wall taking into consideration imperfections

Suleimenov, Ulanbator; Zhangabay, Nurlan; Abshenov, Khassen; Utelbayeva, Akmaral; Imanaliyev, Kuanysh; Mussayeva, Saule; Moldagaliyev, Arman; Raikhanova, Gulnura

doi:10.15587/1729-4061.2022.258118

Cited by 13 publications

(12 citation statements)

References 17 publications

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“…The geometric parameters of the tank wall are as follows: inner diameter, 18.38 m; height, 11.92 m. In height, the tank wall consists of four belts: the lower -with a thickness of 8 mm and a height of 1.49 m; the second -6 mm thick and 1.49 m high; the third -with a thickness of 5 mm and a height of 2.98 m; top -with a thickness of 4 mm and a height of 5.96 m. The maximum height of liquid filling in seismically hazardous areas is 11.08 m. At the place of attachment of the tank wall with the bottom, the boundary conditions of rigid fastening are set. This model of fastening is widely used in the numerical analysis of the strength and vibrations of the tank wall [6].…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…Thus, the service life of finished tanks can be significantly increased. This increases the likelihood of structural failure of the tank in the areas of bolted joints, dents, welds, and other places of stress concentration [4][5][6]. To enable longterm and trouble-free operation of tanks of large volumes, technical solutions are implemented aimed at strengthening the durability of structures.…”

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confidence: 99%

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Influence of the parameters of the pre-stressed winding on the oscillations of vertical cylindrical steel oil tanks

Tursunkululy

Zhangabay

Аврамов

et al. 2022

EEJET

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This paper reports an analysis of the frequencies and shapes of oscillations of the tank with a volume of 3000 m3 with a winding of high-strength steel wire with a diameter of 3 mm, 4 mm, and 5 mm, applied in increments of 1:3. In addition, for the tension force of the turn in the range from 0.2 to 0.8 of the yield strength of the wire material. The study was carried out on the basis of a finite-element method in the ANSYS software package for a three-dimensional geometric model of the structure. At the same time, the software took into consideration the height-uneven width of the cylindrical wall taking into account the height of the filling to the maximum height and the tension forces of the winding. It has been established that a change in the diameter of the winding wire does not lead to a significant change in the spectrum for the first ten significant frequencies. And an increase in the tension force of the wire in the winding leads to a decrease in the magnitude of oscillation frequencies. The exception is the sixth frequency. Its values are equal to one-tenth of a Hz for all estimated cases of the force of tension of the turn in the range from 0.2 to 0.8 of the yield strength of the wire material. The oscillation shapes of the tank reinforced by the winding have been determined. The change in the tension force of the wire in the winding does not change the number of waves at the circumferential coordinate at the free edge of the structure. We studied the loss of stability of the tank wall under distributed internal pressure. A comparative analysis of the sixth oscillation shape and the shape of stability loss reveals that they have the same number of waves at the circumferential coordinate. The results reported here could make it possible to effectively use the pre-stress in order to detune the tank from the resonant frequency when operating in seismically hazardous areas

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Section: The Study Materials and Methodsmentioning

confidence: 99%

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confidence: 99%

Influence of the parameters of the pre-stressed winding on the oscillations of vertical cylindrical steel oil tanks

Tursunkululy

Zhangabay

Аврамов

et al. 2022

EEJET

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“…At the same time, the solution of the problem of energy conservation will indirectly lead to energy savings, the cost of reconstruction, the construction of facilities for the storage and transportation of raw materials. These include industrial pipelines [8], tanks [9][10][11][12][13], and other shell structures [14 -16].…”

Section: Introductionmentioning

confidence: 99%

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Tagybayev,

Zhangabay,

Suleimenov

et al. 2023

EEJET

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This study reports the design of new models of energy-saving enclosing structures with air channels. To calculate the thermophysical parameters of external fences, the Maple computer algebra system was used; the value of thermal resistance of structures was determined on the basis of a finite-element method in ANSYS. The result of the structure analysis showed that the value of thermal inertia of the traditional design and the average value of the thermal inertia of the developed structures were equal. However, the vibration amplitude of the designed enclosing structures was up to 20.72 % more efficient than the traditional one. At the same time, it was revealed that the air gaps did not affect the thermal inertia of the strucure, and its parameters depended only on the total thickness of the material. The analysis showed that the vapor permeability of the inner wall of the designed structures was equal to the traditional one. However, the value of resistance to vapor permeation of the fence of the developed structures was 3.21 % more effective. At the same time, the use of a closed air layer with a heat-reflecting screen makes it possible to shift the possible condensation zone towards the outer surface of the fence. An analysis of the check for the non-condensation of condensate in the ventilated air gap showed that condensate did not fall out in the ventilated air gap in all the considered schemes, and the results of the analysis by the air permeability value showed that all fencing schemes met the requirements for air permeability. Solving the problems of energy saving in construction through the development of new energy-efficient designs of enclosing structures help reduce the cost of thermal energy of buildings, which is an urgent task all over the world today

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“…The need to operate such structures for oil storage and transportation does not exclude the occurrence of accidents or unforeseen technical shutdowns as a result of problems caused by malfunctions during operation, aging of the structure and various deformations, which demonstrated the need for additional studies of the strength of steel shells and the implementation of new engineering solutions. The works [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ] present the results of studies, including the modeling of shell structures under various static and dynamic loads, where studies were also carried out taking into account the deformations of the shell body (pipelines, reservoirs, cisterns, etc.). In the studies [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], work was carried out to study the effect of damage and defects in steel wrappings on the stiffness and natural frequencies of prestressed pipes as well as the characteristics of metals.…”

Section: Introductionmentioning

confidence: 99%

“…The results of the above works [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ] show the general issues of construction and design of steel structures with and without prestressing shells.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Stress State of a Prestressed Cylindrical Shell with Various Structural Parameters

et al. 2022

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The paper presents the results of experimental studies of the features of the operation of prestressed shells, taking into account the various structural parameters of the prestress. It is established that when the winding angle changes from perpendicular to the shell axis to 75° and 65°, the circumferential stresses decrease 1.4 times and 1.2 times, respectively, and the axial stresses increase five and three times, which are two and four times lower than the circumferential, from which it can be concluded that the reduction in the winding angle to the longitudinal the axis of the shell has a positive effect on the stress state of the structure. The study also found that with an increase in the diameter of the winding wire from 1 to 2 mm and a change in the winding angle, the same nature of the stress distribution is observed, but the values of the stress state parameter change, so the efficiency increases up to 25% due to an increase in the winding thickness, depending on the pitch, angle and thickness of the winding, which favorably affects the strength and the bearing capacity of the structure as a whole by increasing the value of the stress state parameter. Thus, the results of the analysis will allow us to use in more detail the possibility of controlling the stress–strain state of the prestressed shell by changing the design parameters, and the results obtained can be used in design or construction, as well as when increasing the strength characteristics of the structure, which allows us to create a high-tech design optimal for these operating conditions, which can positively complement the studies conducted earlier in this direction.

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Estimating the stressed-strained state of the vertical mounting joint of the cylindrical tank wall taking into consideration imperfections

Cited by 13 publications

References 17 publications

Influence of the parameters of the pre-stressed winding on the oscillations of vertical cylindrical steel oil tanks

Influence of the parameters of the pre-stressed winding on the oscillations of vertical cylindrical steel oil tanks

Revealing patterns of thermophysical parameters in the designed energy-saving structures for external fencing with air channels

Experimental Analysis of the Stress State of a Prestressed Cylindrical Shell with Various Structural Parameters

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