Numerical Calculation of the Heat Sink Parameters of the Shell Turbine Vanes at the Modeling of the Heat-Protective Coating with a Different Number of Layers

Andrianov, Ivan K.; Grinkrug, M. S.; Vakuluk, Alla A.

doi:10.1007/978-3-030-69421-0_5

Cited by 8 publications

(7 citation statements)

References 5 publications

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“…As a result, the structure is facilitated, metal is saved, the technology is simplified and the cost of structures is reduced. The results of the research confirm the possibility of using prestress taking into account the parameters for different cases in a cylindrical shell [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ].…”

Section: Resultssupporting

confidence: 62%

“…In any case, the pitch, according to the recommendations of [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], should be less than the half-wave length—

, and it should be selected according to the conditions of the tasks solved by prestressing and a technical and economic comparison of options.…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of experimental studies of a prestressed cylindrical shell is presented below for Stage-I and Sub-stage I-A, according to Tables 1 and 2. In any case, the pitch, according to the recommendations of [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], should be less than the half-wave length-2. 5 √ rδ, and it should be selected according to the conditions of the tasks solved by prestressing and a technical and economic comparison of options.…”

Section: Resultsmentioning

confidence: 99%

“…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. Nonlinear analysis of prestressed round cylindrical shells’ free vibrations was studied, and the simultaneous influence of the prestressed state and the elastic foundation on the eigenfrequencies of shells under various boundary conditions was considered in detail.…”

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%

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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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Section: Resultssupporting

confidence: 62%

, and it should be selected according to the conditions of the tasks solved by prestressing and a technical and economic comparison of options.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2022

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Topological Optimization of a Complex Shape Forming Stamp

Andrianov

2021

J. Phys.: Conf. Ser.

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The scientific research is devoted to the mathematical modeling of the optimal topology of stamps with a complex forming surface. Topological optimization is based on the SIMP method by creating a field of pseudo-densities and minimizing the pliability of the structure under the influence of load. When setting the problem, it is proposed to take into account the fatigue strength of polymers, taking into account the restrictions on the stress state. According to the results of the calculation in the ANSYS software package, an optimal redistribution of the stamp material and a reduction in volume due to the removal of elements that have little effect on the rigidity of the structure is obtained. The results of the study can be further applied in the field of hot and cold stamping by creating stamping tools of minimal volume.

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Development of the Sequential Voids Creation Approach in Axisymmetric Forming Dies

Andrianov

2021

J. Phys.: Conf. Ser.

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The study deals with the problem of topological optimization of forming dies with a limitation on fatigue strength. As a model of a stamp, a typical geometric configuration of stamps for the manufacture of parts of the " cup " type is considered. The algorithm for finding the optimal topology is proposed to be built separately in the internal areas under the stamp flanges and under the bottom of the "cup" of forming. Mathematical regularities are presented, according to which elements that fall into the area of predicted removal have a very small elastic modulus, which is widely used in topological optimization methods, then the stress state level is analyzed according to the fatigue strength curve. In the area of the flanges, there is a "build-up" of the mass according to the quadratic law with a variation in the depth of removal of the material. In the area of the bottom of the " cup " of forming, a step-by-step addition of rod elements is proposed until the level of the stress state meets the specified restrictions. Thus, this study is a modification of the topological optimization method. The novelty of the research lies in the construction of a new geometric scheme for determining the area of stored and deleted elements. The results of the study can be further developed in the development of methods for effective redistribution of material, as well as significantly reduce the material costs for the production of metal forming dies.

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Numerical Calculation of the Heat Sink Parameters of the Shell Turbine Vanes at the Modeling of the Heat-Protective Coating with a Different Number of Layers

Cited by 8 publications

References 5 publications

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

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

Topological Optimization of a Complex Shape Forming Stamp

Development of the Sequential Voids Creation Approach in Axisymmetric Forming Dies

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