面向集中力扩散的回转曲面加筋拓扑优化方法

In order to improve the concentrated force diffusion efficiency of the stiffened connection structure of the revolving curved surface of a spacecraft, it is necessary to carry out the design of the concentrated force diffusion structure of the revolving curved surface with stiffeners. The traditional design methods of radial ribs generally rely on design experience and are difficult to meet the requirements for efficient diffusion of concentrated force. Therefore, a topology optimization method for the revolving curved surface with stiffeners oriented to concentrated force diffusion is proposed. In the first step, a topology optimization method for concentrated force diffusion based on anisotropic filtering technology is established to ensure that the topology optimization results meet the manufacturing process requirements of the revolving curved surface with stiffeners. In the second step, an intelligent reconstruction method for topology optimization results based on mesh deformation technology is proposed, which can efficiently and accurately perform automatic model reconstruction on the topology optimization results of the revolving curved surface with stiffeners. Based on the proposed method, a case study is carried out with the docking ring of a satellite platform, a typical revolving curved surface stiffened shell, as the object, and the optimization results are compared with those of the traditional radial rib design. The results show that the proposed optimization method can obtain optimization results with clear stiffener configurations that meet the manufacturing process requirements of the revolving curved surface with stiffeners, and has the advantages of high concentrated force diffusion efficiency, low dependence on mesh quality, and efficient reconstruction of topological features.

为了提高航天器回转曲面加筋型连接结构的集中力扩散效率,需要开展回转曲面加筋集中力扩散结构设计。传统放射肋设计方法普遍依赖设计经验、难以满足集中力高效扩散需求。因此,提出一种面向集中力扩散的回转曲面加筋拓扑优化方法。第1步,建立了一种基于各向异性过滤技术的集中力扩散拓扑优化方法,保证拓扑优化结果满足回转曲面加筋制造工艺要求;第2步,提出了一种基于网格变形技术的拓扑优化结果智能重构方法,可高效准确地对回转曲面加筋拓扑优化结果进行模型自动重构。基于所提出方法,以卫星平台对接环这种典型的回转曲面加筋壳为对象开展算例研究,并将优化结果与传统放射肋设计结果进行对比。结果表明,所提出的优化方法可得到加筋构型清晰、满足回转曲面加筋制造工艺要求的优化结果,且具有集中力扩散效率高、网格质量依赖性低、拓扑特征重构高效等优点。