考虑液固耦合立式储液罐地震反应数值分析

发布时间：2018-03-05 03:30

本文选题：储罐　切入点：有限元　出处：《大连海事大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着全球经济的迅猛发展,世界各国对石油与天然气等能源的需求程度日益加深。立式储液罐作为石油、石化及相关企业必备的工业储液设施,其需求量日益增长。立式储罐多用于存储危险品,一旦发生破坏,不仅会造成火灾、经济损失等直接灾害；还会造成环境污染等次生灾害。因此大型立式储液罐抗震的研究显得尤其重要。本文利用大型有限元分析软件ADINA,在结构模态分析的基础上,考虑三维地震激励的影响,对立式储液罐有限元模型及其简化模型进行地震动响应分析,并对立式储液罐进行参数敏感性分析,了解各参数对结构响应的影响程度。为结构抗震设计及工程实践提供理论依据。1.立式储液罐模态分析采用ADINA有限元软件,建立了大型立式储液罐的有限元数值模型。建立不同体积立式储液罐的有限元模型,分别进行模态分析,得到储罐的前十阶振型,并将其频率与规范算法进行对比,验证模型的正确性。分析各种参数对立式储液罐固有特性的影响,为立式储液罐系统的振动特性分析提供依据。2.立式储液罐地震响应及参数敏感性分析选取两条实际地震波和一条人工波,利用时程分析法获得模型在三种地震波作用下的响应。得到立式储液罐沿罐壁高度方向的加速度、位移、应力和速度的极值曲线,并对典型节点的时程响应进行分析。然后进行参数敏感性分析,了解各参数对结构响应的影响程度。3.立式储液罐罐液简化及地基简化模型地震动响应分析建立立式储液罐的罐液简化模型及地基简化模型,并对简化模型进行固有特性分析,验证模型的正确性,然后对简化模型进行地震动响应分析。
[Abstract]:With the rapid development of the global economy, the demand for oil and natural gas and other energy resources in the world is deepening day by day.Vertical liquid storage tanks are essential industrial liquid storage facilities for oil, petrochemical and related enterprises. Its demand is increasing day by day. Vertical storage tanks are mostly used to store dangerous goods, once damaged, it will not only cause fire, economic losses and other direct disasters; It will also cause secondary disasters such as environmental pollution. Therefore, it is particularly important to study the earthquake resistance of large vertical storage tanks. In this paper, based on structural modal analysis, the effect of three-dimensional earthquake excitation is considered by using the large-scale finite element analysis software Adina. The finite element model and simplified model of opposite-type liquid storage tank are used to analyze the ground motion response, and the parameter sensitivity of the opposite tank is analyzed. To understand the influence of each parameter on the structural response, to provide theoretical basis for seismic design and engineering practice of the structure. 1. The modal analysis of vertical liquid storage tank is carried out with ADINA finite element software. The finite element model of large vertical liquid storage tank is established, the finite element model of different volume vertical liquid storage tank is established, the modal analysis is carried out, the first ten vibration modes of the tank are obtained, and the frequency of the model is compared with the standard algorithm. To verify the correctness of the model. The influence of various parameters on the inherent characteristics of liquid storage tanks is analyzed. Provide the basis for the vibration characteristic analysis of the vertical liquid storage tank system. 2. Two actual seismic waves and one artificial wave are selected for the seismic response and parameter sensitivity analysis of the vertical liquid storage tank. The response of the model under three kinds of seismic waves was obtained by time-history analysis. The acceleration, displacement, stress and velocity of the vertical storage tank along the height of the tank wall were obtained, and the extreme value curves of the acceleration, displacement, stress and velocity were obtained. The time-history response of typical nodes is analyzed, and then the sensitivity of parameters is analyzed. To understand the influence of the parameters on the structural response .3.The analysis of the ground motion response of the simplified model of the vertical tank and the simplified foundation of the liquid tank, the simplified model of the vertical tank and the simplified model of the foundation are established, and the natural characteristics of the simplified model are analyzed. The correctness of the model is verified, and then the seismic response of the simplified model is analyzed.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE972

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