A simple approach to find optimal topology of a continuum with tension-only or compression-only material

A simple approach to find optimal topology of a continuum with tension-only or compression-only material
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寻找仅拉伸或仅压缩材料的连续体的最佳拓扑的简单方法

DOI:
10.1007/s00158-010-0614-7
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发表时间:
2011-06
影响因子:
3.9
通讯作者:
Cai, Kun
Cai, Kun
中科院分区:
工程技术2区
文献类型:
--
作者:
Cai, Kun

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为了提高纯拉伸或纯压缩连续介质结构拓扑优化的效率,提出了材料替换法。传统的有限元分析将纯拉或纯压材料结构视为非线性结构,需要多次重新分析才能获得准确的物理场,以便优化时更新设计变量。为了提高结构优化的效率,提出了一种材料替代方法,即用具有相同有效弹性的各向同性材料替代原有的只拉伸/压缩材料。该方法包含两个主要思想。一是将材料非线性的结构再分析纳入优化的全局迭代中。二是根据局部应力状态逐步修正局部刚度。数值结果表明了该方法的有效性。
The material-replacement method is presented to improve the efficiency of topology optimization of a continuum structure with tension-only or compression-only material. Traditionally, a structure with tension-only or compression-only material should be considered as nonlinear in finite element analysis and many times of reanalysis are required to obtain the accurate physical fields for the update of the design variables in optimization. To improve the efficiency of structural optimization, the material-replacement method is proposed, in which the original tension/compression only material is replaced with an isotropic material with the same effective elasticity. The method contents two major ideas. One is the structural reanalysis for nonlinearity of material is put into the global iteration of optimization. The other is that the local stiffness will be modified step by step according to the local stress state. Numerical results show the validity of the method.
DOI: 10.1007/bf01279647
发表时间: 1996
期刊: Structural optimization
影响因子: --
作者:
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