DETERMINING THE DYNAMIC CHARACTERISTICS OF ELASTIC SHELL STRUCTURES

Polyakova I. Imambayeva R. Aubakirova B.
2021 Technology Center

Eastern-European Journal of Enterprise Technologies
2021 #6 Issue 7(114)43 - 51 pp.

Building structures are very often operated under the action of dynamicloads, both natural and man-made. The calculation of structures underthe influence of static loads has been quite widely studied in detail. Whenstructures are exposed to dynamic loads, additional tests are carried out,where measuring instruments are installed on the structures to registerstresses and deformations that occur during dynamic influences. Elasticelements are the responsible functional unit of many measuring instruments.Therefore, the quality of elastic elements ensures the operationalstability of the entire structure. This determines the increased attentionthat is paid to technology and construction to elastic elements. Previously,the work of elastic elements made of homogeneous mono materials with thesame physical and geometric properties in all directions and over the entiresurface of the element was studied.The elastic element was considered as a shell of rotation with a complexshape of the meridian and various physical and mechanical propertiesat various points caused by uneven reinforcement. Two types of reinforcementwere implied ‒ radial and circular. Elastic shell elements (ESE)operate under conditions of dynamic loading. The equation was derivedfor determining the dynamic characteristics of inhomogeneous elastic elements.The dependences of the first three natural frequencies of oscillationson the thickness of the shell and the depth of the corrugation and the firsttwo natural frequencies of oscillations on the thickness of the shell havebeen analyzed. The amplitude-frequency characteristics (AFC) and thephase-frequency characteristics (PFC) of the shell depending on the geometricparameters have been calculated. All these results could significantlyimprove the quality of the readings of the instruments, which depend onthe sensitivity of the shell elastic elements. And it, in turn, depends on thegeometric and physical properties of the shell elastic elements

Amplitude-frequency characteristics (afc) , Boundary conditions , Geometric parameters , Phase-frequency characteristics (pfc) , Shell elastic elements (see)

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