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Numerical analysis of cylindrical shell stability interacting with inhomogeneous soil
- Authors: Kosytsyn S.B.1, Akulich V.Y.1
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Affiliations:
- Russian University of Transport
- Issue: Vol 17, No 6 (2021): Prospects for the application of shell structures and thin shells in the first half of the 21st century
- Pages: 608-616
- Section: Numerical methods of shell analysis
- URL: https://journals.rudn.ru/structural-mechanics/article/view/30916
- DOI: https://doi.org/10.22363/1815-5235-2021-17-6-608-616
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Abstract
The research is aimed at determining the critical buckling load of the spatial model “shell - soil” system in the case of inhomogeneous physical and mechanical soil properties along the longitudinal axis of the cylindrical shell in a nonlinear formulations of the task. Methods. The task is solved by a numerical method using a finite element complex ANSYS. Two calculated cases of the spatial model “shell - soil” system are compiled. The soil is divided into two equal parts with different physical and mechanical properties. The problem was solved in geometrically, physically and constructively nonlinear statement. Nonlinearity is due to the need to find the contact zone through an iterative process and determine the time-varying position of the shell. The soil is modeled by volumetric elements, each consisting of twenty nodes. The shell is modeled by flat elements, each consisting of four nodes. Contact elements of one-side action are used. Critical buckling load are determined relative to the actual load of its own weight. Results. Critical loads are obtained from two calculated cases of the spatial model “shell - soil” system. There is a comparative analysis of the results. An assessment of the stability margin of the shell relative to the actual load is given.
About the authors
Sergey B. Kosytsyn
Russian University of Transport
Email: kositsyn-s@yandex.ru
ORCID iD: 0000-0002-3241-0683
adviser of the Russian Academy of Architecture and Construction Sciences, D.Sc. in Engineering, Professor of the Department of Theoretical Mechanics
9 Obraztsova St, bldg 9, Moscow, 127994, Russian FederationVladimir Yu. Akulich
Russian University of Transport
Author for correspondence.
Email: vladimir.akulich@gmail.com
ORCID iD: 0000-0002-9467-5791
PhD student, Department of Theoretical Mechanics
9 Obraztsova St, bldg 9, Moscow, 127994, Russian FederationReferences
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