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Information × Registration Number 0219U100758, 0116U007435 , R & D reports Title Development methodology for diagnostics of integrity of technological objects of the pipeline systems is with the use of the fields of different nature popup.stage_title Head Chekurin Vasyl' F., Доктор фізико-математичних наук Registration Date 11-03-2019 Organization Instytut pryklаdnykh problem mekhаniky i mаtemаtyky im. Ya.S. Pidstryhаchа NAN Ukrаiny popup.description2 New integrated acoustoelasticity relations for cylindrical pipes have been obtained. The relations connect spatial distribution of deformation components in the pipe’s body with informative parameters that can be measured by ultrasonic methods. On this basis, new direct and inverse problems for determination the stress-strain state of pipelines with the use of empirical data are formulated. The variational methods for solving the problems have been formulated and numerical studies developed. Research results confirmed the suitability of the developed mathematical models and methods to create new non-destructive methods and technical means for determination the stress-strain state of the pipelines. The obtained results can be used to create new non-destructive methods and technical means for monitoring the residual stresses in the welds of the pipelines  Product Description popup.authors popup.nrat_date 2020-04-02 Close