Nonlinear stability analysis of thin FGM annular spherical shells on elastic foundations under external pressure and thermal loads

2015 ◽  
Vol 50 ◽  
pp. 28-38 ◽  
Author(s):  
Vu Thi Thuy Anh ◽  
Dao Huy Bich ◽  
Nguyen Dinh Duc
Keyword(s):  
Stability Analysis ◽  
Nonlinear Stability ◽  
External Pressure ◽  
Thermal Loads ◽  
Nonlinear Stability Analysis ◽  
Spherical Shells ◽  
Elastic Foundations

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

2009 ◽  
Author(s):  
Baosheng Dong ◽  
Xinwei Zhao ◽  
Hongda Chen ◽  
Jinheng Luo ◽  
Zhixin Chen ◽  
...  
Keyword(s):  
Spherical Shell ◽  
Nonlinear Stability ◽  
Storage Tank ◽  
Critical Pressure ◽  
External Pressure ◽  
Shallow Spherical Shell ◽  
Nonlinear Stability Analysis ◽  
Spherical Shells ◽  
Oil Storage ◽  
Oil Storage Tank

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.

Nonlinear Stability Analysis of Pressure-Loaded imperfect Stiffened Cylinders

1979 ◽  
Vol 23 (02) ◽  
pp. 123-126
Author(s):  
G. J. Simitses ◽  
I. Sheinman ◽  
J. Giri
Keyword(s):  
Stability Analysis ◽  
Nonlinear Stability ◽  
External Pressure ◽  
Numerical Results ◽  
Elastic Behavior ◽  
Nonlinear Stability Analysis ◽  
Stiffened Shells ◽  
Submarine Hull

This paper deals with the buckling of imperfect, thin, circular, cylindrical, stiffened shells under the application of external pressure. The methodology is based on the smeared technique, the Von Karmgn-Donnellnonlinear kinematic relations, and linearly elastic behavior, and it considers both axisymmetric and symmetric imperfections. Numerical results for various configurations are presented. These include some optimal stiffened configurations which exemplify submarine hull designs for operating depths of 1000 and3000 ft (305 and 915 m).

scholarly journals Nonlinear stability analysis of rotor-bearing systems

PAMM ◽  
2009 ◽  
Vol 9 (1) ◽  
pp. 279-280 ◽  
Author(s):  
Aydin Boyaci ◽  
Wolfgang Seemann ◽  
Carsten Proppe
Keyword(s):  
Stability Analysis ◽  
Nonlinear Stability ◽  
Nonlinear Stability Analysis ◽  
Rotor Bearing
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