基于拓扑优化的铝合金桁架新结构  

A new topology optimization structure of aluminum alloy truss

作　　者：晏致涛[1,2] 曹俊阳 朱朝晖 翟运琼 YAN Zhitao;CAO Junyang;ZHU Chaohui;ZHAI Yunqiong(College of Civil Engineering,Chongqing University,Chongqing 400045,China;School of Architectural Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Nanning Architectural Design Institute,Nanning 830011,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆科技学院建筑工程学院,重庆401331 [3]南宁市建筑设计院,广西南宁830011

出　　处：《四川建筑科学研究》2020年第5期43-49,共7页Sichuan Building Science

基　　金：广西重点研发计划(桂科AB16380308)。

摘　　要：铝合金材料由于自重轻而在屋架结构上具有较大的优势。首先,本文通过Hyper Mesh软件对铝合金桁架结构进行了拓扑优化,根据拓扑结果设计出了符合铝合金材料的最优桁架形式。然后,运用ANSYS软件对跨度12 m、18 m、27 m、36 m、45 m的桁架形式进行了进一步的形状与截面尺寸优化,提出了一种新的铝合金桁架结构形式。结果表明,随着体积分数不断增大,拓扑图里的受力杆件更加清晰,桁架可以采用不加竖杆,腹杆采用三角形或者交叉的新形式。按新设计的桁架形式进行截面优化设计后,耗铝量明显优于常规桁架结构形式,尤其是对跨度超过27 m的,按拓扑优化后的新桁架形式能够节约更多的材料。Aluminum alloy material has great advantage in roof truss structure because of its light weight.According to the topology results of aluminum alloy truss structure optimized through the Hyper Mesh software,the optimal truss form is designed according to the aluminum alloy material.For the spans of 12 m,18 m,27 m,36 m and 45 m,the shape and size of the truss are further optimized by ANSYS software,and a new type of aluminum alloy truss structure is proposed.The results show that with the increase of the volume fraction,the stressed members in the topological diagram are more clear,and the new type of triangle or cross without vertical members or web members can be adopted for the truss structure.After the sectional optimization design according to the new design truss,the aluminum consumption is obviously better than the conventional truss structure,especially for the span of more than 27 m,the new truss structure optimized according to new topology shape can save more materials.

关 键 词：铝合金桁架 拓扑优化 形状尺寸优化 耗材量 

分 类 号：TU395[建筑科学—结构工程]