Vibration characteristics of composite plates considering fluid-structure coupling

In order to investigate the influence of fluid-structure coupling on the dynamic characteristics of the amphibious aircraft, the free vibration characteristics of composite plates in contact with a bounded fluid are studied based on the combination of Nurbs-Bézier and penalty function in which the fluid-structure coupling effect is equivalent to added mass that is uniformly distributed over the wet area. The numerical accuracy and convergence are also examined by comparison with the open literatures. Using parametric analysis, the effects of elastic restrained edge stiffness, aspect ratio, fluid depth ratio, fiber orientation, initial pre-stress, and initial imperfection on the free vibration characteristics of composite plates are examined and discussed in detail. The results indicate that the proposed analysis method has high accuracy and the fluid-structure coupling has a significant impact on the vibration characteristics of composite plates under different fluid depth ratios.