Modeling and analysis of functionally graded curved panels in high-speed flow with mutual fluid-thermal-structural coupling

摘要

Functionally Graded Materials (FGMs) are designed as skins of high-speed aircraft for thermal protection. The estimation for complex coupling behaviors of the FGM panel are crucial for the flight safety of the high-speed vehicles. The paper proposes a comprehensive model for aerothermoelastic responses of functionally graded curved panel with the consideration of several important effects: a) geometric nonlinearity of the panel; b) the temperature-dependent material properties of the panel; c) mutual coupling between the elastic deformation and aerodynamic heating; d) transient in-plane and through-thickness temperature distribution from the aerodynamic heating; e) the curvature effect of the panel. For the aerodynamic loads, the first-order piston theory is used, and Eckert reference enthalpy method is used to simulate the aerodynamic heating. The solution of the motion equation of the panel is obtained by finite element method and validated with the results from existing literatures. Finally, dynamic behaviors of the curved panel are studied at given flight altitude with different aerodynamic pressures.