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Information × Registration Number 0212U007069, 0111U004075 , R & D reports Title "Transient dynamics of shell structures on deformation foundation@ - second year of realization of project popup.stage_title Head Lugovoy Petro Zakharovich, Registration Date 27-04-2012 Organization S.P.Timoshenko Institute of Mechanics popup.description2 Numerical techniques are developed to solve the problems of interact the cylindrical and spherical shells and ground medium The ground medium is modeled with axisymmetric differential equations of one-dimentional flows and its state is determined in according to non-linear model of three-component medium.A techique of theoretical determination of Winkler's coefficient of elastic foundation is developed.The influence of reiforcement and elastic foundation coefficient on the values of eigenfrequencies and changing of eigenmodes of shallow ribbed shells with rectangular planform is studied.The appearence of multiple eigefrequencies leads to change of eigenmodes. Gain -frequency characteristics of forced vibration of cylindrical shell with flowing liquid in resonance area are determined. А technique of determination of stress state of elastic halfplane on the surface of which appliвd instantly non-stationary loading is developed. The solution of the problem is realized with use the Laplace's integral transformation and expansion of Fourier's series.The exact expressions of normal stress and displacement are obtained. . Product Description popup.authors Гузь Олександр Миколайович Ковальчук Петро Савич Кубенко Веніамін Дмитрович Луговий Петро Захарович Мейш Володимир Федорович Подчасов Микола Павлович Прокопенко Ніна Яківна popup.nrat_date 2020-04-02 Close