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Information × Registration Number 0219U102178, 0117U004447 , R & D reports Title Development of methods and means to monitor stress-strain state of hydraulic turbines, taking into account conditions popup.stage_title Head Kharchenko Yevghen V., Доктор технічних наук Registration Date 20-12-2019 Organization Lviv Polytechnic National University popup.description2 The energy approach to the estimation of material damage and growth of defects in the material under the operational loads has been formulated. A technique for determining the mechanical characteristics of materials and establishing the local strains in the vicinities of stress concentrators was developed using the method of of digital correlation of images. Mathematical, software and methodological means for estimating the workability of the components of hydropower turbine equipment taking into account the action of static and dynamic loads and hydrogen absorption have been developed based on the application of the energy criterion of fracture. The finite element model of the rotor shaft of a rotary-bladed hydropower turbine for the Kyiv pumped hydroelectric energy storage was developed taking into account the effect of operational loads, as well as the process of damage accumulation. The analysis of the stress-strain state of the structural components under the conditions of transverse shear was carried out, on the basis of which the conditions of crack initiation and growth were established and the analytical dependence for calculating the stress intensity factor was substantiated using shear stresses. The mathematical and software means for the calculations of the non-stationary oscillations and stress-strain state of long-dimensional structures have been improved, taking into account the close interaction of electromagnetic phenomena in electric machines and mechanical oscillation and wave phenomena. Product Description popup.authors Ivanytskyi Yaroslav L. Blikharskyi Zinovii Z. Vikovych Ihor A. Vira Volodymyr V. Haiduk Volodymyr H. Hembara Oksana V. Hopchak Bohdan I. Hutyi Andriy V. Kulyk Volodymyr V. Kunta Olha Ye. Lanets Olena V. Lenkovskiy Taras M. Palyukh Volodymyr M. Polishchuk Leonid K. Stasyuk Bohdan M. Filimonov Oleksiy S. Chepil Olga Ya. Chumalo Halyna V. Shyshkovskyy Roman O. popup.nrat_date 2020-04-02 Close