Aeroelastic Topology Optimization of Wing Structure Based on Moving Boundary Meshfree Method

Symmetry

Xiaozhe Wang¹  Zhiqiang Wan²  Shanshan Zhang²  Zhi Wang³ 

[1] Institute of Unmanned System, Beihang University, Beijing 100191, China;School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;Zhejiang Key Laboratory of General Aviation Operation Technology, General Aviation Research Institute of Zhejiang Jiande, Jiande 311612, China;

关键词: meshfree method;    topology optimization;    NURBS;    aeroelasticity;    large aircraft;   

DOI  :  10.3390/sym14061154

来源: DOAJ

【 摘 要 】

The increasing structural flexibility of large aircraft leads to significant aeroelastic effects. More efficient topology optimization techniques are required for the design to further take advantage of aeroelasticity and obtain lightweight structures. This paper proposes a moving boundary meshfree topology optimization that combines the Galerkin method of weighted residuals and non-uniform rational B-splines (NURBS). The solution domain is described by the control points of NURBS and its property is calculated adaptively with an integration subtraction technique. The minimal compliance is searched for using the globally convergent method of moving asymptotes (GCMMA) by designing the locations of control points as subject to volume and flux constraints. The method is first applied to a typical two-dimensional design example with symmetric boundary conditions. The results show that the shape constraints can be conveniently applied, and smoother boundaries are obtained with fewer parameters. Then, a three-dimensional wing structure with asymmetric boundary conditions is optimized. A three-dimensional flight load that combines the high-order-panel and meshfree methods is employed to calculate the elastic loads and update asymmetric external loads during the optimization process. The designed wing satisfies engineering requirements and the presented method can solve the practical topology optimization problems of three-dimensional structures.

【 授权许可】

Unknown