应用模糊、混沌、神经网络等理论，以结构质量为优化目标函数，在构造一个新型的布局优化模型的基础上，对桁架结构布局优化这一结构优化领域的难点问题进行了研究。构造了一个完整的桁架结构智能布局优化系统，该系统由5 个模块组成，具有智能、自适应的特点，在确定了结构选型情况下，可以自动完成从基结构的智能自动建立到结构布局寻优的全过程。经实例验证，系统性能稳定，可以得到满足要求的结构布局优化解。

Intelligent layout optimization system of truss structures, based on fuzzy, neural network, and chaos, is made of five modules. A new layout optimization model is formed. This system takes on intelligent and adaptive. It can complete the whole optimization programming including automatically creating of ground structure of trusses and layout optimization. It is showed by an example that this system is stable and the final layout optimization result is reliable.