增材制造损坏替换件拓扑优化设计方法  

Topology optimization method for designing replacement of the damaged part

作　　者：尤熙雯 高彤[1] 张卫红[1] YOU Xiwen;GAO Tong;ZHANG Weihong(State IJR Center of Aerospace Design and Additive Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学航宇材料一体化设计与增材制造装备技术国际联合研究中心,西安710072

出　　处：《航空工程进展》2024年第1期23-29,50,共8页Advances in Aeronautical Science and Engineering

基　　金：国家自然科学基金(12172294)。

摘　　要：应急保障和战时抢修是增材制造技术发展的重要方向之一,也给面向增材制造的结构优化设计提出了新的挑战。为了实现异种材料原位替换件的构型设计,提出增材制造损坏替换件拓扑优化设计方法,并以机用散热风扇为例开展应用研究。通过分析散热风扇服役环境和战时抢修需求,在变密度方法框架下建立结构总质量和转动惯量控制在原件数据附近小范围以内、以结构整体柔顺度最小化为目标的拓扑优化问题列式,并完成灵敏度分析公式推导。从拓扑优化结果及其重构模型的仿真数据可知:散热风扇替换件拓扑优化结果收敛性好、满足所有设计要求,重构方案满足增材制造工艺性要求,验证了本文设计方法的有效性。Emergency support and wartime repair are one of the important directions for the development of additive manufacturing technology,and also pose new challenges to the structural optimization design for additive manufacturing.In order to realize the configuration design for replacement parts of dissimilar materials,a method of topology optimization for designing replacement of damaged part manufactured by additive manufacturing was proposed.The cooling fan of an airplane is investigated as an example.Based on the analysis of the service environment and rush-repair requirement,a topology optimization problem is established under the framework of the variable density method.Meanwhile,the weight and the moment of inertia of the replacement part should be kept as equal as possible to those of the original part.Accordingly,the topology optimization formulation is established to minimize the overall structural compliance under the interval constraints of the weight and the moment of inertia of the whole structure.Sensitivity analysis is carried out consider the design-dependent effects of the centrifugal forces.According to the topology optimization result and the analysis data of the re-modelled structure,it can be seen that the topology optimization results of the cooling fan replacement parts have good convergence and meet all the design requirements.The reconstruction scheme meets the process requirements of additive manufacturing,which verifies the effectiveness of the design method in this paper.

关 键 词：拓扑优化 增材制造 损坏结构 替换件 应急保障 

分 类 号：V260.5[航空宇航科学与技术—航空宇航制造工程] TH122[机械工程—机械设计及理论]