A numerical and experimental study of hydroelastic shell vibrations
DOI:
https://doi.org/10.15587/1729-4061.2014.28861Keywords:
hydroelastic vibrations, finite elements method, natural vibrations, spectral analysisAbstract
The paper presents numerical and experimental research on hydroelastic and elastic shell vibrations. It suggests methods for calculating natural vibration frequencies of constructions placed in the vacuum as well as their vibration frequencies while interacting with water. Testing a cylinder reservoir and a conical shell has proved the effectiveness of the suggested approach and confirmed the reliability of the findings. Filling a liquid in a construction significantly alters its dynamic properties, thus studying the vibrations of shells containing liquids in their inner cavities poses an important scientific and technical task.
We have studied how a liquid influences vibration frequencies in a cylinder reservoir. The calculation results based on the suggested method were compared with the analytical conclusion and experimental findings. The natural frequency reduction factors obtained with the suggested method were close to the analytical conclusion and experimental findings. The research proved that their divergence fluctuates between 0.1 % and 2.8 %. Similar research was conducted for a conical shell, with numerous findings being compared to the experimental data. The divergence made up 2.0 % for vacuum vibrations and 7.0 % for vibrations of shells filled with a liquid.
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Copyright (c) 2014 Сергей Юрьевич Мисюра, Александр Николаевич Шупиков, Владимир Григорьевич Ярещенко
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