Influence of the Rotational Flexibility of Supports on the Dynamic Parameters of the Arch Structure
[ 1 ] Instytut Analizy Konstrukcji, Wydział Inżynierii Lądowej i Transportu, Politechnika Poznańska | [ P ] pracownik
2022
rozdział w monografii naukowej / referat
angielski
- flexible connections
- arched structures
- dynamic characteristics
- semi-rigid nodes
- finite element
EN The article examines bar structures modelled by finite elements, in which nodes are flexibly connected to the supports. Two-node elements with three degrees of freedom at each node and non-curved axis were used. Polynomial shape functions were adopted to derive the stiffness and mass matrices, but they were modified by introducing rotational flexibility in the boundary supports. The determined finite element matrices were used for the numerical analysis of the circular arch to determine its dynamic parameters. Changes in the frequency of free vibrations of arches of different heights with changing rotational elasticity of supports were determined.
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