Effect of layup parameters on the aeroelasticity of large span ratio composite wing

doi:10.19936/j.cnki.2096-8000.20241028.009

Abstract

Abstract: The dipole grid method is used to calculate the non-constant aerodynamic forces and the P-K method is used to calculate the flutter velocity to investigate the flutter characteristics of composite airfoils with large aspect ratios, focusing on the effects of non-equilibrium coefficient layups, equal-thickness multiangular layups, and same-angle variable-thickness layups on the flutter velocity and the hypersonic cratering phenomenon. It is shown that the ±45° layer angle can increase the flutter speed and reduce the cratering area compared with the 0° layer angle to obtain a larger flight Mach number and dynamic stability; in the low subsonic speed, the flutter speed of the equalized layer is higher than that of the unbalanced layer, and the change of the flutter speed on the unbalanced coefficient is not significant. In high-subsonic speed, the balanced layer can enhance the flutter velocity at the lowest point and reduce the depth of the crater, while the unbalanced layer can lag the flutter velocity at the lowest point; the increase of the layer thickness can enhance the flutter velocity with a linear relationship, but the intrinsic frequency decreases with the increase of the layer thickness.

Key words: large aspect ratio composite wing, layering parameters, flutter velocity, pit

CLC Number:

TB332

WANG Kangjie, WANG Junli, CAO Peng, LIU Zhiyuan, ZHANG Sheng. Effect of layup parameters on the aeroelasticity of large span ratio composite wing[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(10): 65-71.

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