Reference problem
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Geometry, Materials, and Boundary Conditions
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It is a structure with simple geometry, of the thin cylinder type, filled to the brim and subjected to a defined seismic excitation with stress spectra.


* geometric parameters of the cylinder:


*radius*R* = 7 m,


*height*H* = 21 m,


*thickness of the sheet*e* = 15 mm,


* material parameters:


*Young's modulus of the structure (steel)*E* = 1.95·1011 Pa,


*Poisson's ratio*ν* = 0.3,


*density of the structure*rodri* = 7850 kg/m3,


*density of liquid (water)*rodriL* = 1000 kg/m3,


*depreciation*c* = 4%,


* boundary conditions:


* base of the cylinder (lower surface) blocked according to the three degrees of freedom (DDL) of translation,


* zero pressure at the level of the free surface of the fluid.


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Seismic excitation
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The seismic load is given by a ground spectrum in the two horizontal directions (X and Y) and in the vertical direction (Z).


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