立式储液罐地震响应数值分析及基础隔震研究

发布时间：2018-01-15 03:11

  本文关键词：立式储液罐地震响应数值分析及基础隔震研究　出处：《华中科技大学》2013年硕士论文　论文类型：学位论文

  更多相关文章： 立式储液罐 隔震参数 地震响应 流固耦合 液体晃动 罐底提离

【摘要】：随着社会经济的发展，储液罐在石油、化工企业的运用越来越广泛。立式储液罐的破坏不仅可能造成石油、化工企业的直接损失，还会造成范围更大、强度更大的次生灾害，因此储罐的防震抗震得到了很多学者的高度重视。对于立式钢制锚固储液罐而言，很多学者都在借助一维简化的弹簧质量块Haroun-Housner模型来研究地震的线性响应。其主要有两个方面的不足：第一，此简化模型过于简单，无法真实地反应储罐局部结构的响应；第二，此模型只能从结构线性总响应角度来评价储罐的抗震性能，并不能考虑到几何及材料非线性效应和变厚度的罐壁等因素。对于立式钢制非锚固储液罐而言，，还没有一个简单有效的模型来真实地模拟流-固耦合、几何大变形、液面大幅度晃动、材料非线性和状态非线性等多种非线性因素作用下的储罐地震反应分析问题。基于此，本文借助大型通用有限元ANSYS软件，考虑流固耦合、几何大变形、液面大幅度晃动、材料非线性、状态非线性以及罐壁变厚度等因素，建立了储罐有限元分析模型，对常见的立式圆柱形钢制储液罐在水平地震作用下进行了隔震前后的数值计算与分析。主要完成的工作如下： 1．系统地探讨在Ⅲ类场地9度区下，隔震层参数对不同高径比立式钢制锚固储液罐地震响应的影响规律。 2．系统地探讨了在Ⅲ类场地9度区下1000立方米的储液罐在不同储液高度下，隔震层参数对立式钢制锚固储液罐地震响应的影响规律。 3．据前面的规律来选取最优隔震参数，来对1000立方米的立式钢制锚固储液罐在Ⅲ类场地9度区下进行隔震前后震害分析并进行对比。 4．对经典的Clough立式钢制非锚固储液罐（Clough矮罐）建立基于考虑液体晃动及罐底提离的立式储液罐非线性ANSYS有限元模型，并在水平地震作用下进行罐底提离机理探讨以及罐壁“象足”变形仿真分析，且运用基底隔震技术来分析储罐地震响应变化规律。
[Abstract]:With the development of social economy, the application of liquid storage tanks in petroleum and chemical enterprises is more and more extensive. The destruction of vertical storage tanks may not only cause direct losses of petroleum and chemical enterprises, but also cause a larger scope. Because of the higher intensity of secondary disasters, many scholars attach great importance to the earthquake resistance of storage tanks. For vertical steel Anchorage storage tanks. Many scholars are using one-dimensional simplified spring mass block Haroun-Housner model to study the linear response of earthquake. There are two main shortcomings: first, the simplified model is too simple. The response of the local structure of the tank can not be truly reflected; Secondly, the model can only evaluate the seismic performance of the storage tank from the view of the total linear response of the structure. The geometric and material nonlinearity and the variable thickness of tank wall can not be taken into account. There is no simple and effective model to simulate the fluid-solid coupling for the vertical steel non-Anchorage liquid storage tank. The seismic response analysis of the storage tank under the action of many nonlinear factors, such as large geometric deformation, large sloshing of liquid surface, material nonlinearity and state nonlinearity, is based on this. In this paper, the factors of fluid-solid coupling, geometric deformation, liquid level sloshing, material nonlinearity, state nonlinearity and tank wall thickness are considered with the aid of large scale finite element ANSYS software. The finite element analysis model of storage tank is established, and the numerical calculation and analysis of common vertical cylindrical steel storage tank before and after seismic isolation are carried out. The main work is as follows: 1. The influence of isolation layer parameters on the seismic response of vertical steel Anchorage liquid storage tanks with different height-diameter ratio is systematically discussed in the 9 degree zone of type 鈪

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