Application of Aircraft Structural Part Conceptual Design Based on Topology Optimization Method

In order to decrease the weight of aircraft structural parts effectively,facing to the skeleton of aircrafts,the author regards the conceptual design of structural parts(such as strengthen frame,general frame and canard beam) as research contents.By analyzing the concept of 'gradient variable-threshold' and pointing out its weakness,the author proposes the concept of 'modified gradient threshold' and combines it with the strategy of 'constraint compensation' to form a new kind of topology optimization algorithms for structural layout of structural parts.The topology optimization results of multiple examples show that their layouts are very innovative and are worthy to study in detail.So we can reach three conclusions.One is that using the combination of CAD/CAE and topology optimization for aircraft structural part above mentioned conceptual design is feasible.Second is that the proposed 'modified gradient threshold' topology optimization algorithm is effective.The third is that a new design approach with a good operation that differs from conventional design method is constructed for structural part structure layout.