NDLI: Nonlinear Stability Analysis of the Vaulted Roofs With Corrosion Defects of Oil Storage Tank

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Dong, Baosheng Zhao, Xinwei Chen, Hongda Luo, Jinheng Chen, Zhixin Zhang, Hua Zhang, Guangli Ji, Lingkang Zhang, Yi
Copyright Year	2009
Abstract	The vaulted roofs of oil storage tank are usually designed as the shallow spherical shells subjecting to a uniform external pressure, which have been widely observed that these shallow spherical shells undergo various levels of corrosion in their employing conditions. It is important to assess the stability of these local weaken shallow spherical roofs due to corrosion for preventing them from occurring unexpected buckling failure. In this paper, the uniform eroded part of a shallow spherical oil tank vaulted roof is simplified as a shallow spherical shell with elastic supports. Based on the simplification, a general pathway to calculate the critical pressure of eroded shallow spherical shell is proposed. The modified iteration method considering large deflection of the shell is applied to solve the problem of nonlinear stability of the shallow spherical shells, and then the second-order approximate analytical solution is obtained. The critical pressure calculated by this method is consistent with the classical numerical results and nonlinear finite element method, and the calculation errors are less than 10%. It shows that it is feasible to apply the method proposed here.
Sponsorship	Pressure Vessels and Piping
Starting Page	763
Ending Page	767
Page Count	5
File Format	PDF
ISBN	9780791843666
DOI	10.1115/PVP2009-77527
e-ISBN	9780791838549
Volume Number	Volume 3: Design and Analysis
Conference Proceedings	ASME 2009 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2009-07-26
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Shallow spherical shell Elastic support Vaulted roofs Stability Modified iteration method Roofs Shallow spherical shells Storage tanks Corrosion
Content Type	Text
Resource Type	Article

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