Abstract：The aeroelastic flutter in subsonic flow needs to be considered when composite variable-stiffness panels with curvilinear fibers are applied to high-speed and lightweight designation of train structures. The classical thick theory along with the Mindlin plate is used for structural modeling and the potential flow theory is for aerodynamic modeling. Then, the aeroelastic model of composite variable-stiffness panels with curvilinear fibers is established based on the principle of virtual work and the finite element method, which is respectively solved by the complex mode theory in frequency domain and the Newmark method in time domain. After the validity and convergence of the presented method is verified, the flutter behaviors under different ply orientations are investigated. Numerical results demonstrate that the critical dynamic pressure changes by varying the path orientations of curvilinear fibers, which can increase the design space of composite panel flutter.
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