考虑气动-结构耦合的机翼三维 结构拓扑优化方法

针对机翼三维结构拓扑优化方法在工程实际应用中的气动-结构耦合问题,开发了一种在机翼翼型表面直接加载气动载荷的三维拓扑优化方法。用更接近真实工程的约束和载荷条件进行结构拓扑优化,便于考虑不同翼型之间气动载荷的差异,并兼顾拓扑优化方法的载荷敏感性;利用MATLAB编写自动网格划分、施加约束和载荷、求解优化的结构分析程序,实现气动-结构分析统一模型;最后通过实例验证了方法的可行性及有效性。结果表明该方法为载荷敏感的拓扑优化方法更精确得到符合实际工况的优化结果提供了一种实用的方案;并对于气动-结构耦合三维拓扑优化方法进行了原理性的探索研究。

Research on Topology Optimization of Three-Dimensional Structure for Aerodynamic-structure Coupling Problem of Wing

In order to solve the problem of aerodynamic-structure coupling in the practical application of wing, a three-dimensional topology optimization method is developed to directly loading aerodynamic loads on the airfoil surface. It is convenient to consider the difference of aerodynamic loads between different airfoils by using the constraints and load conditions which are closer to the real engineering, and the load sensitivity of the topological optimization method is also taken into account. This paper wrote the structural analysis program of automatic grid division, imposing constraints and loads, and solving optimization, and realizes the unified model of aerodynamic and structural analysis with MATLAB software. Finally, the feasibility and effectiveness of the method is verified by an example. The conclusion shows that the method provides a valid scheme for the load-sensitive topology optimization method to get more accurate optimization results in accordance with the actual working conditions, and makes a theoretical study on the aerodynamic-structure coupling three-dimensional topology optimization method.