储罐等效力学简化模型的研究

发布时间：2018-05-13 01:02

本文选题：储罐 + 模态分析　；参考：《核动力工程》2017年03期

【摘要】：为保证储罐抗震设计的合理性,对基于刚性壁理论和柔性壁理论的Housner和Haroun-Housner两种等效液动效应力学简化模型进行比较。使用ANSYS有限元软件建立2种不同尺寸储罐的液固耦合模型,进行模态分析和地震反应谱分析,将2种简化模型理论计算结果与有限元模型计算结果进行比较。分析结果表明:2种简化模型理论中储液一阶晃动频率与有限元模型数值解相符;Haroun-Housner模型理论中一阶耦联频率的公式解具有比较高的精确度;对于刚性储罐,2种简化模型与液固耦合有限元模型计算结果都比较接近;对于柔性储罐,Haroun-Housner模型与液固耦合有限元模型计算结果比较接近。通过对比发现,对柔性储罐采用Housner模型进行设计是不保守的,应采用基于容器弹性变形假设的Haroun-Housner模型。
[Abstract]:In order to ensure the rationality of seismic design of storage tanks, two simplified models of equivalent hydrodynamic effects, Housner and Haroun-Housner, based on rigid wall theory and flexible wall theory, are compared. Two kinds of liquid-solid coupling models of different size tanks were established by using ANSYS finite element software. Modal analysis and seismic response spectrum analysis were carried out. The theoretical results of the two simplified models were compared with those of the finite element model. The results show that the first order sloshing frequency in the two simplified models is consistent with the numerical solution of the finite element model. The formula of the first order coupling frequency in the Haroun-Housner model theory has a high accuracy. For rigid storage tanks, the two simplified models are similar to the liquid-solid coupling finite element model, and for the flexible storage tank, the results of Haroun-Housner model and liquid-solid coupling finite element model are close to each other. It is found that the Housner model is not conservative in the design of the flexible storage tank, and the Haroun-Housner model based on the elastic deformation hypothesis of the container should be adopted.
【作者单位】：中国核电工程有限公司系统与布置设计所;中国核工业集团公司核动力事业部;
【分类号】：TB12

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