Evolutionary Structural Optimisation Incorporating Tension and Compression Materials
Evolutionary Structural Optimisation Incorporating Tension and Compression Materials
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DOI：
10.1177/136943329900200403
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发表时间：
1999-08
影响因子：
2.6
通讯作者：
H. Guan;G. Steven;Y. Xie
中科院分区：
文献类型：
--
作者：
H. Guan;G. Steven;Y. Xie
渐进结构优化（ESO）方法基于一个简单的概念，即通过缓慢地从过度设计的结构中去除低效使用的材料，结构的剩余形状朝着最佳方向发展。传统的ESO方法已被证明是成功的，在生成最佳的拓扑结构，形状和尺寸的各种结构。然而，它主要涉及各向同性和均匀材料。在工程结构的优化设计中，为了有效地利用现有的材料，同时考虑材料的拉压性能，本文提出了将传统的ESO方法扩展到拉压材料。本文提出了基于主应力准则的二维连续体结构优化算法。此外，两个性能指标的拉伸和压缩为主的设计也开发。它们可以有效地用于评估各种设计的结构效率，并确定最佳的设计拓扑结构。实际的设计问题，包括斜拉桥和拱桥模型，使用所提出的算法解决。数值结果表明，纳入拉/压材料是非常有效的，在实现拉伸和压缩为主的设计。最佳设计产生了结构形状，使可用材料得到最佳利用。
The Evolutionary Structural Optimisation (ESO) method is based on the simple concept that by slowly removing inefficiently used material from an over-designed structure, the residual shape of the structure evolves towards an optimum. The conventional ESO method has proven to be successful in generating optimum topologies, shapes and sizes for all kinds of structures. However, it mainly deals with isotropic and homogeneous materials. In optimum design of engineering structures, to efficiently use the available materials taking into account their behaviour in tension and compression, an extension of the conventional ESO method to the incorporation of tension/compression material has been proposed. The algorithms based on the principal stress criteria for optimisation of two-dimensional continuum structures are presented in this paper. In addition, two performance indices for tension- and compression-dominated designs are also developed. They can be used effectively to evaluate the structural efficiency of the various designs and to determine the optimum design topology. Practical design problems are solved using the proposed algorithms, including cable-stayed and arch bridge models. Numerical results indicate that the incorporation of tension/compression material is very effective in achieving tension- and compression-dominated designs. The optimum design has produced the structural shapes that make the best utilisation of the available materials.