Parametric Study of an Equatorially Anchored Deepwater Fluid-Filled Periodic Symmetric Shell with Constraint Volume
Publication: Journal of Engineering Mechanics
Volume 141, Issue 8
Abstract
In the study, a two-dimensional closed shell containing fully incompressible fluid is modeled to investigate the behavior of an equatorially anchored deepwater shell storage container. The volume constraint conditions of the shell and contained fluid due to the several external loadings are taken into consideration. The shell, which is installed in deepwater by using anchors at its equator, is assumed to be interacting with the rigid foundation. Since the shell is subjected to periodic anchored forces, the deformed configuration is dependent on the tangential, normal, and circumferential displacements. Therefore, two-dimensional elements are used for investigating the displacements in the shell. Differential geometry is introduced to compute the shell geometry, and small displacement theory is used to calculate the initial strain. The energy functional of the shell and internal fluid are derived from the principle of virtual work in terms of displacements, and are expressed in the appropriate forms. The static deformed configuration of the shell can be obtained by using the nonlinear finite-element method, in which the numerical solutions are solved using an iterative procedure. The validity of the present model and the influence of various geometrical parameters under several external loadings on the shell equilibrium configuration are demonstrated. The results show that the tangential and normal displacements are significant and have an important role in the analysis of a deepwater periodic symmetric shell storage container.
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Acknowledgments
The first and second authors gratefully acknowledge financial support by the Thailand Research Fund (TRF) and King Mongkut’s University of Technology Thonburi (KMUTT) through the Royal Golden Jubilee Ph.D. program (Grant No. PHD/0134/2552), and by the National Research University (NRU) initiative.
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Published In
Journal of Engineering Mechanics
Volume 141 • Issue 8 • August 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Apr 2, 2014
Accepted: Dec 22, 2014
Published online: Apr 23, 2015
Published in print: Aug 1, 2015
Discussion open until: Sep 23, 2015
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