有限元单元网格剖分对结构抗震反应分析的影响
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摘要
有限元模型的单元网格剖分是影响分析精度的一个基本因素,是有限元分析前处理的主要工作。模型的不同形式单元网格剖分得到的计算结果也有所不同,理论上单元尺寸越小得到的计算结果精度越高。但针对具体结构,单元格的加密并不能带来理想的结果。该文由GID个人前/后处理软件7.0版对某水库大坝进行有限元动力分析,对大坝不同的单元网格剖分的地震反应结果进行了分析比较,这将对土石坝的有限元分析的单元格剖分类型的选择提供参考。
The finite element model of the unit mesh accuracy of impact analysis are an essential element,it is the finite element analysis of the main tasks before the treatment.Model of different forms of unit mesh of the calculation results ob-tained are also different,in theory,the smaller the cell size obtained higher accuracy of calculation results.However,spe-cific structure,the cell is encrypted and can not bring about the desired results.This article from personal GID pre / post-processing software version 7.0 of a dam for finite element dynamic analysis of dam different unit mesh of the seismic re-sponse results were analyzed and compared,and this will of the finite element analysis of embankment dams dividing cell types of choice to provide some reference.
The finite element model of the unit mesh accuracy of impact analysis are an essential element,it is the finite element analysis of the main tasks before the treatment.Model of different forms of unit mesh of the calculation results ob-tained are also different,in theory,the smaller the cell size obtained higher accuracy of calculation results.However,spe-cific structure,the cell is encrypted and can not bring about the desired results.This article from personal GID pre / post-processing software version 7.0 of a dam for finite element dynamic analysis of dam different unit mesh of the seismic re-sponse results were analyzed and compared,and this will of the finite element analysis of embankment dams dividing cell types of choice to provide some reference.
引文
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[8]胡聿贤.地震工程学[M].北京:地震出版社,1988.
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[10]罗文斌,钱稼茹.钢筋混凝土框架结构基于位移的抗震设计[J].土木工程学报,2003.
[2]刘晓青,李同春.复杂区域二维有限元网格自动生成团[J].河海大学学报,1998.
[3]曹新红,陈尚法,陈胜宏.三维复杂域四面体有限元网格行波法生成团[J].武汉水利水电大学学报,1998,(1).
[4]Kausel E.Local transmitting boundaries[J].Engng.Mesh,1988,114.
[5]Wolf P J.A comparison of tine-domain transmitting boundaries[J].Earthq.Engng.Struct.Dyn,1986,14,655-673.
[6]朱伯芳.有限单元法原理及应用[M].北京:中国水利水电出版社,1998.
[7]高学奎.近场地震动输入问题的研究[J].华东科技学院学报,2005,2.
[8]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[9]王亚勇.结构抗震时程分析法输入地震记录的选择方法及其应用[J].建筑结构,1992.
[10]罗文斌,钱稼茹.钢筋混凝土框架结构基于位移的抗震设计[J].土木工程学报,2003.
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