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Information × Registration Number 0225U001157, (0122U001336) , R & D reports Title Development of the theory and methods of analysis of vibration processes in complex deformable systems under operational loads of periodic, stochastic and shock character popup.stage_title Апробація розроблених методів і алгоритмів прогнозування перебігу вібраційних процесів у пружних деформівних системах при дії експлуатаційних навантажень періодичного, стохастичного та ударного характеру Head Lizunov Petro P., Доктор технічних наук Registration Date 26-01-2025 Organization Kyiv National University of Construction and Architecture popup.description1 Development of new theoretical foundations, methods and algorithms of research and analysis: dynamic reaction of elastic systems undergoing extraordinary transient loads; predicting the behavior of vibratory impact nonlinear energy absorbers; dynamic behavior of thin shells with shape imperfections under intense loads, including stochastic; thermoelastic coupled oscillations of of massive structural elements, which occur due to explosive temperature and force loading popup.description2 New theoretical foundations, methods and algorithms for investigation and analysis of efficiency and dynamic behavior of vibro-impact nonlinear energy sinks; dynamic behavior of thin shells with shape imperfections under intensive loading; termoelastic connected oscillations of the massive constructions have been developed. Object of study: efficiency and dynamic behavior of vibro-impact nonlinear energy sinks, which together with the primary structure constitute strongly nonlinear discontinuous systems; dynamic behavior of thin elastic shells with shape imperfections; system response when its parameters and loading characteristics change. Description of research methodology: analysis and verification of created calculation schemes; creation of the differential motion equations; selection of numerical methods and software for their integration; development and analysis of optimization procedures; performing numerical experiments for testing obtained variants of optimal design with using nonlinear dynamics methods; using the finite elements method; using wavelet analysis; using the method of boundary integral equations. Theoretical and practical results: performed analysis of efficiency and dynamic behavior of vibro-impact nonlinear energy sinks depending on their parameters, parameters of the system and exciting force; recommendations for vibro-impact dampers are given; analysis of the influence of real and simulated shape defects on the dynamic behavior of thin elastic shells is presented. Novelty: new knowledge gained; new theoretical basis, new methodology and algorithms for the application of passive vibration control and protection of heavy structure for defense and civilian use were obtained; the results obtained have both scientific and economical and social effects. Product Description popup.authors Ivanchenko Hryhorii M. Vorona Yurii V. Kryvenko Olha P. Lizunov Petro P. Lukianchenko Olha O. Pohorielova Olha S. Postnikova Tetiana H. Fesan Oleksandr M. popup.nrat_date 2025-01-26 Close