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Study on Static Strength and Dynamic Response of the Large Oil Storage Tank

Author: ShenJianMin
Tutor: ChenZhiPing
School: Zhejiang University
Course: Chemical Process Equipment
Keywords: Large oil tanks Combination of cylindrical shell Finite Element Stress Test Solid-liquid coupling Earthquake Hydrodynamic pressure
CLC: TE972
Type: Master's thesis
Year: 2006
Downloads: 447
Quote: 15
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Abstract


With large tanks, the potential risk is also increasing, once such a large tank rupture, it will cause a significant loss. To ensure the safety of the large oil tanks, the need for further research on the the tank static strength and seismic response. In this paper, the \The major work: (1) to consider the impact of the tank bottom plate of the second lap siding stress, a large tank stress analysis method based on the combination of cylindrical shell theory. The method first lap siding as short cylindrical shells, other lap siding is regarded as a long cylindrical shell, the bottom plate is rigid - elastic foundation beam coupling model, the base of the first lap siding and second lap siding joint modeling solution tank siding with the backplane stress formula. (2) using the axisymmetric finite element method to calculate the overall stress of the tank, the introduction of the foundation and the base plate of the contact element method simulation of the interaction. Contact element method to simulate the interaction of siding with the base plate in the bottom fillet welds incomplete penetration area, draw incomplete penetration area affect the range of 60 mm. The tank opening parts of the stress can no longer axisymmetric finite element method to calculate the accurate and efficient calculation of the stress of the opening portion of the tank, and the introduction of a sub-model. (3) in the 15 × 10 ~ 4m ~ 3 tank test water during the stress test, to obtain a large number of measured data. Test value, the theoretical calculations and finite element calculation values ??coincide well, which test the theoretical calculation and finite element analysis is reliable. (4) using a three-dimensional finite element method to calculate the dynamic characteristics of the solid-liquid coupling system of large oil tanks. The different liquid storage density, different liquid level depth of the impact on the natural frequency of the system, the following conclusions: the denser the liquid storage tank solid-liquid coupling vibration of the lower natural frequency, the higher the tank liquid level solid-liquid coupling vibration inherent The lower the frequency. (5) using the finite element method to simulate the 15 × 10 ~ 4m ~ 3 tanks earthquake time history response. Study the distribution of the hydrodynamic pressure tank under seismic excitation, conducted a preliminary analysis of the free surface of the shaking. During an earthquake the tank wall portion there will be a large negative pressure, which may be the tank wall portion prone to \

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CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Oil and gas storage and transportation machinery and equipment > Oil and gas database, oil and gas tank
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