基于SLM工艺的航空铝合金支架的轻量化设计  

Lightweight design of aluminum-alloy aero support based on SLM

作　　者：王旭葆[1] 曲波[1] WANG Xu-bao;QU Bo(Institute of Laser Engineering,Beijing University of Technology,Beijing 100020)

机构地区：[1]北京工业大学激光工程研究院,北京100020

出　　处：《机械设计》2018年第10期50-53,共4页Journal of Machine Design

摘　　要：金属增材制造技术以其可以高效成型复杂结构的优势,逐渐成为一种成熟的制造手段。金属增材制造在可以成型复杂结构的零组件整体,在减少连接机构和连接工艺的同时,也可以成型出传统工艺无法成型的空前形状结构的部件,从而达到轻量化的目的。文中通过有限元分析对原始设计进行了数值计算,随后通过拓扑优化、形状优化等手段,对其进行结构上的重新设计。该设计结合了激光选区熔化(SLM)的成型优势,最终使质量减轻24.5%,工况加权刚性提升38.3%,框架体积减少12.2%,位移量最大减少32.7%。MAM （Metal Additive Manufacturing） has emerged as a mature manufacturing method, thanks to its advantage of efficient molding of complex structures. By means of MAM, various components of a complex structure can be formed, while less connection mechanism and processes are adopted. Besides, some components with unprecedented shapes, which cannot be formed by the conventional process, can be created, thereby attaining the goal of lightweight. In this paper, the original design is numerically calculated based on the finite element analysis, and then it is structurally re-designed by means of topology and shape optimization. The design, in conjunction of the molding advantages of SLM（Selective Laser Melting）, ensures the weight reduction by 24.5%, the weighted-stiffness increase by 38.3%, the frame-volume reduction by 12.2%, and the maximum-displacement reduction by 32.7%.

关 键 词：金属增材制造 轻量化 SLM 拓扑优化 

分 类 号：TN249[电子电信—物理电子学]