Spatial natural vibrations of viscoelastic axisymmetric structures

Mirsaidov, Mirziyod; Khudainazarov, Sherzod

doi:10.18720/mce.96.10

Cited by 8 publications

(2 citation statements)

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“…In articles [12][13][14][15], mathematical models with dynamic effects have been developed based on experimental and theoretical studies. Dynamic characteristics are determined, considering the thickness variability according to the shell's viscoelastic theory.…”

Section: Introductionmentioning

confidence: 99%

Simulation of dynamic processes of shell structures with viscoelastic elements

et al. 2023

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The paper presents the choice and method of calculating thin-walled structures that adequately reflect deformation in the compensator example. When choosing a design model, the influence of structural elements and their mechanical characteristics on its behavior in various operating conditions is taken into account since sometimes small changes in the design model can significantly impact the design analysis results. The complete design scheme of most designs, particularly the compensator, leads to statically indeterminate systems. Taking into account the energy dissipation in the shell material; the boundary value problems are reduced to a system of ordinary differential equations of the 12th order. The forms of natural oscillations for the first four natural frequencies are given. It is established that the inertia forces acting in the axial direction do not significantly affect the stress-strain state of shell structures.

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Section: Introductionmentioning

confidence: 99%

Simulation of dynamic processes of shell structures with viscoelastic elements

et al. 2023

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“…In the articles [17][18][19], the spatial natural vibrations of high-rise smoke stacks of various thermal power plants and the ventilation stack of nuclear power plants according to the theory of shells in the elastic statement and viscoelastic statement using the developed methods and PC-IBM calculation programs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the dynamic characteristics of complex multiply connected, structurally inhomogeneous systems

et al. 2023

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In this work, its application's theoretical and methodological foundations are developed for calculating the dynamic characteristics of shell structures that function independently or are parts of a complex mechanical system as a substructure. An important stage in the study of the dynamic behavior of the complex multiply connected shell structure under consideration is the determination of the dynamic characteristics of the structure, which include natural frequencies and modes of vibration, amplitude-phase frequency characteristics, dynamic coefficients of influence, dynamic stiffness and the coefficient of dynamicity. A solution method, an algorithm, and a program for calculating dynamic problems of structurally inhomogeneous shell systems have been developed. The developed method makes it possible to determine the dynamic characteristics of structurally inhomogeneous shell systems, numerical results are obtained, and graphs of the change in vibration frequencies depending on the inhomogeneity parameter are plotted.

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