SEISMIC DESIGN EVALUATION OF LIQUID-FILLED STIFFENED STEEL CYLINDRICAL TANKS

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Wiriyachai Roopkumdee ◽  
Iraj Mamaghani
Keyword(s):  
Dynamic Analysis ◽  
Seismic Design ◽  
Dynamic Buckling ◽  
Transient Dynamic Analysis ◽  
Element Analysis ◽  
Buckling Loads ◽  
Transient Dynamic ◽  
Liquid Storage ◽  
Cylindrical Tanks ◽  
Stiffened Steel

This paper aims to estimate dynamic buckling loads of cylindrical liquid storage tanks. Finite element analysis is performed using ANSYS computer program. Twelve different geometries of the cylindrical tanks are analyzed with height to diameter (H/D) ratios of 0.5, 1.0, 1.5, and 2.0 and the diameter to thickness (D/t) ratios of 1000, 1500, and 2000 to cover tall and short cylindrical tanks. The dynamic buckling capacities of cylindrical tanks filled with water up to 90% of their height are investigated in this study. The transient dynamic analysis is performed to find the dynamic buckling loads. Applied dynamic loads in this study are horizontal earthquake excitations in terms of acceleration (g) due to gravity. The transient dynamic analysis results indicate that the dynamic buckling loads decrease when the H/D ratios increase, and the dynamic buckling loads decrease when the D/t ratios increase. Design curves for the cylindrical tanks of various geometries subjected to earthquake accelerations are generated.

Dynamic Analysis of Liquid Storage Cylindrical Tanks due to Earthquake

2014 ◽  
Vol 969 ◽  
pp. 119-124 ◽  
Author(s):  
Kamila Kotrasova ◽  
Ivan Grajciar
Keyword(s):  
Dynamic Analysis ◽  
Seismic Response ◽  
Seismic Design ◽  
Response Spectrum ◽  
Theoretical Background ◽  
Earthquake Activity ◽  
Liquid Storage ◽  
Cylindrical Tanks

Ground-supported tanks are used to store a variety of liquids. This paper provides theoretical background of seismic design of liquid storage ground-supported circular tanks. During earthquake activity the liquid exerts impulsive and convective (sloshing) actions on the walls and bottom of the circular tank. Seismic response was calculated by using the seismic response spectrum. Knowledge of these inner forces is important for design of reservoirs.

Transient Dynamic Analysis of Maglev Linear Feed Unit

2011 ◽  
Vol 317-319 ◽  
pp. 405-409
Author(s):  
An Dong Jiang ◽  
Jiang Jin ◽  
Su Yang Ma ◽  
Zheng Peng Xia ◽  
Ping Liao
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Magnetic Levitation ◽  
Element Model ◽  
Design Stage ◽  
Transient Dynamic Analysis ◽  
Element Analysis ◽  
Forecast Performance ◽  
Transient Dynamic ◽  
Feed Unit

Abstract. The magnetic levitation linear feed unit is a new type of machine features. In machining, the tool and workpiece interaction force will be delivered to the table and make the deformation, resulting in processing errors of machine tools, machining of precision and surface quality. In this paper we established three-dimensional finite element model of the table of feed unit, use the finite element analysis software ANSYS to analysis of the transient dynamic analysis of the pre-designed table and improve the structure of the table at the design stage and forecast performance of the table and provide a theoretical basis for structure optimization.

scholarly journals Dynamic Analysis of Gear and Rack Transmission System

2014 ◽  
Vol 8 (1) ◽  
pp. 662-667
Author(s):  
Xiao Yanjun ◽  
He Lihu ◽  
Zhu Jiayu ◽  
Xiao Yanchun
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Bending Strength ◽  
Natural Frequencies ◽  
Equivalent Stress ◽  
Element Model ◽  
Transmission System ◽  
Transient Dynamic Analysis ◽  
Element Analysis ◽  
Transient Dynamic

This paper firstly established a three-dimensional modal of gear and rack transmission system. By using finite element analysis software the model is analyzed and the first six natural frequencies of the gear and rack transmission system are acquired. According to the natural frequencies, actual working speed can be adjusted to avoid resonance. In light of the modal analysis, the transient dynamic finite element model of the gear and rack transmission system is established for the transient dynamic analysis. According to the equivalent stress contour of the gear and rack in contact progress at various times and based on transient dynamic analysis, contact strength and bending strength of the gear are verified and the maximum equivalent stress position is found, providing a theoretical basis for the optimization of the gear and rack.

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