Numerical simulation of warhead transportation

Martynenko, Gennadii; Аврамов, К. В.; Martynenko, Volodymyr; Chernobryvko, Marina; Tonkonozhenko, A. M.; Kozharin, V.

doi:10.1016/j.dt.2020.03.005

Cited by 19 publications

(15 citation statements)

References 21 publications

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“…Paper [16] reports the results of modeling the operation of steel cylindrical tanks filled with liquid. Study [17] describes the procedure of numerical analysis of the composite structure under the operational loads associated with the transportation of tanks. Work [18] deals with a cylindrical tank for storing petrochemical products.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…At the same time, there is no method of calculation to be effectively used in studies of the features of the stressed-strained state of the walls of tanks with local curvature in the zones of mounting joints. In the cited works [16][17][18][19][20][21][22][23][24][25], the presence of stress concentration in the zone of the vertical welded mounting joint was directly or indirectly revealed. However, none of the procedures gives a clear definition of the presence of stress concentration, there is no list of parameters affecting the concentration of stresses.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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

Suleimenov

Zhangabay

Abshenov

et al. 2022

EEJET

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Based on the use of a multi-level mathematical model, this paper estimates the stressed-strained state of a cylindrical reservoir in the mounting joint and considers the concentration of stresses in the joint zone. The correctness of the selected mathematical model was verified to show that for an engineering assessment of the stressed-strained state of the wall of a cylindrical tank with variable thickness, it is possible to use the ratios for a cylindrical shell with a constant wall thickness. The spread of values is no more than 1 %, which indicates the proper selection of the mathematical model. A numerical assessment of the stressed-strained state in the zone of the mounting joint proved the assumption of significant stress concentrations in the zone and indicated the determining effect exerted on the concentration of stresses by its geometric dimensions. The concentration of stresses in the joint zone of the tank wall was investigated at various sizes in the ANSYS programming environment. The result of calculating the stressed-strained state of the reservoir for various values of the dent parameters f/t and is the constructed polynomials that approximate the stress concentration coefficient Kσ. As a result of the calculations, an interpolation polynomial and an approximating stress concentration coefficient were derived, which could be used to assess the strength, durability, residual life of the tank and to normalize the limiting dimensions of the imperfection of the joint. This paper reports comparative results of the calculations of the stress concentration coefficient depending on the geometric dimensions of the imperfection of the mounting joint in the ANSYS software package, as well as using an interpolation polynomial. The results could be used to assess the strength and residual life of such structures.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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

Suleimenov

Zhangabay

Abshenov

et al. 2022

EEJET

View full text Add to dashboard Cite

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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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“…It was concluded that till the 16-degree attack angle, both lift and drag coefficients rise but after this mark the lift coefficient falls while the drag coefficient dominates. Martynenko 21 , et al carried out the computational modelling of warhead transportation to estimate the maximum and most dangerous load values due to forces at land operations and transportation by natural roads, aviation and water. These loads were used for numerically simulating the warhead using ANSYS, which helped analysing the operability and fatigue strength of the cartridge warhead using the calculations of the mean stresses and the amplitude fatigue stresses.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Aerodynamic Characteristics of F16 and F22 Combat Aircraft using Computational Fluid Dynamics

Malik

Tevatia

2021

Def. Sc. J.

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This paper presents the computational investigation of air flow over an aircraft at realistic speeds while demonstrating the importance of extending the existing analysis to the complete airplane and how pivotal it is in improving its in-flight performance. The study is done for F16 and F22 aircraft using ANSYS Fluent (19.2) to obtain pressure distribution, shear stress distribution and temperature variation on the complete surface of the aircraft. Since the front section of the aircraft is prone to direct initial impact of surrounding environment, this portion is also examined. Here, as the speed is doubled from Mach 1 to Mach 2, a rise in the value of all the three variables is noticed for the F16 aircraft, whereas the pressure distribution for F22 aircraft shows strange behaviour for the highest speed (Mach 2). On comparing the results over the whole surface, it is seen that F16 experiences smaller pressure (29% lower for Mach 1 and 30% for Mach 2), temperature (9.5% lower for Mach 1 and 30% for Mach 2) and shear stress relative to F22 and the stress shows a huge change (90% lower for Mach 1 and 83% for Mach 2). Results of the present study imply that the design of the aircraft highly influences its performance as the parameters discussed touch their limits.

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Numerical simulation of warhead transportation

Cited by 19 publications

References 21 publications

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

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

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

Comparative Analysis of Aerodynamic Characteristics of F16 and F22 Combat Aircraft using Computational Fluid Dynamics

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