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Information × Registration Number 0219U003008, 0116U004950 , R & D reports Title The development of stochastic nonlinear models for elastic bodies vibrations and facilities of their application for the virbation diagnosis of structural elements fatigue damage popup.stage_title Head Yavorskyj Ihor, Registration Date 29-01-2019 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 The research work is aimed on creating new methods of spectral analysis for periodically non-stationary random vibrations in the case of unknown period of non-stationarity. The main task of such analysis is detection and analysis of the frequency range of vibrations, which is caused by spectrum shifting, i.e. is a result of the modulation of the rotation harmonics by a stochastic component. Using of covariance methods for the searching and analysis of the hidden periodicities allows one only to estimate the general power of modulation interaction without specification of its spectral structure. The carried out investigations shown that the analysis of the periodic non-stationarity properties in the frequency domain allows one to investigate structure of the damage in details and to improve the defects detection, define their types and to separate sources of vibration. Product Description popup.authors Варивода Микола Зенонович Василів Андрій Ярославович Дзерин Оксана Юріївна Дувіряк Андрій Аскольдович Луферчик Павло Петрович Мацько Іван Йосипович Стецько Ігор Григорович Телепко Володимир Антонович Трохим Георгій Романович Черчик Геннадій Тимофійович Юзефович Роман Михайлович popup.nrat_date 2020-04-02 Close