基于应力约束的翼肋拓扑优化和软件二次开发

翼肋主要作用是维持机翼外形，对于机翼的总弯曲刚度贡献较小，但是翼肋的重量却在翼盒的结构重量中占有相当大的比例（一般为8％～12％），因此有必要通过一定的结构优化方法减轻翼肋的结构重量。在MSC．PATRAN平台上二次开发了应力约束全局化的拓扑优化方法，并首次将该方法应用于翼肋的拓扑优化；采用了一套工程估算方法，可用于翼肋的初步设计和快速重量估算。结果表明：在满足稳定性要求的情况下，经过拓扑优化的翼肋结构减重效果明显。

Topology Optimization of the Wing Rib Based on Stress Constraints and Software Secondary Development

The ribs are used to keep the shap of the wing and only carry little of the global bend loads acting on the wing. However, the weight of ribs makes up significant fractions of the total weight of the wing box, about 8% to 12%. So it is very necessary to use some optimization method to reduce the weight of the ribs. An topology optimization method named globalization of stress constraints, which is developed on the MSC. PATRAN, is used to optimize the ribs of the wing for the first time. An engineering prediction method is applied for the primary design of the rib and fast calculation of the mass of the rib. The studies indicate that the rib weight based on the optimal topology configuration that is satisfied with the stability requirements can be reduced apparently.