柔性变弯度后缘机翼的风洞试验模型优化设计

doi:10.7527/S1000-6893.2021.26071

Abstract

Abstract: In this paper, optimal size parameters are explored for a compliant morphing trailing edge device with high deformation accuracy. This device transmits force and movement through elastic deformation, and includes an actuator, and an integral skin-beams structural. A systematical design framework is proposed in order to find the optimal actuating and structural size parameters for a morphing trailing edge under a given structural topology. This framework consists of a shape parameterization for morphing trailing edge wing, aerodynamic shape optimization tool, and structural parameter optimization methods. Geometric nonlinearity is considered when solving structural large deformation. Comparative studies have shown that the Least Square Error distance cannot capture the local disturbance, while the Fréchet distance can well control the maximum deformation error, needs fewer iterations, and can obtain better results with higher overall deformation accuracy. Numerical simulations verify the effectiveness of the proposed optimization method. The optimal design of four initial structures with different topology are obtained, with a maxi-mum improvement for deformation accuracy of 91%. Finally, a prototype of compliant morphing trailing edge is realized through additive manufacturing, which has a deformability of 22.5° downward and 7.5° upwards.

Key words: morphing trailing edge, compliant mechanisms, optimization design, wind tunnel test model, shape similarity

CLC Number:

V224.4

ZHANG Zhenkai, JIA Sijia, SONG Chen, YANG Chao. Optimum design of wind tunnel test model for compliant morphing trailing edge[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(3): 226071-226071.

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Optimum design of wind tunnel test model for compliant morphing trailing edge

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