拓扑优化中不同空间单元的计算效率分析
王能,孙丽萍,王玉艳,范小秦,李冰
(大连交通大学,辽宁 大连 116028)
摘要:通过具体计算实例分析比较了在拓扑优化中线性单元和二次单元的计算精度和效率。计算结果表明:二次单元模型的计算精度高,但其计算时间是线性单元的近百倍,优化效率低。线性六面体单元和线性五面体单元相对二次单元模型的精度偏差分别为4.57%14.62%,基本上能保证计算精度。因此有必要采用线性单元组合或二次和线性组合单元对复杂模型进行拓扑优化,以减小计算规模,提高计算效率。
关键词:二次单元;线性单元;拓扑优化;计算效率
中图分类号:TB21          文献标识码:A          文章编号:10060316 (2012) 01001505
Computing efficiency analysis based on topology optimization of different space elements
WANG Neng,SUN Li-ping,WANG Yu-yan,FAN Xiao-qin,LI Bing
(Dalian Jiaotong University,Dalian 116028,China)
Abstract:Topology optimization of the specific instance is discussed in this paper, the computing efficiency and accuracy of topology results built on linear elements and quadratic elements are compared.Results show that the quadratic element model has higher accuracy,however,it’s calculate time is nearly a hundred times than linear element model,which causes thedecreasing problem of efficiency.The linear hexahedral and pentahedron element model relative to quadratic one for the bias are 4.57% and 14.62%,the accuracy satisfies the requirements. Therefore,in the topology optimization of complex models,it’s necessary to adopt the combination of linear elements or quadratic combine with linear elements,to reduce the size and improve the efficiency.
Key words:quadratic element;linear element;topology optimization;computing efficiency

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收稿日期:20110603

作者简介:王能(1987-),女,浙江金华人,硕士研究生,主要研究方向为结构优化。

 

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