A nonlinear energy sink (NES) is used to suppress panel flutter. A nonlinear aeroelastic model for a two-dimensional flat panel with an NES in supersonic flow is established using the Galerkin method. First-order piston aerodynamic theory is adopted to build the aerodynamic load. The effects of NES parameters on flutter boundaries of the panel are investigated using Lyapunov’s indirect method. The mechanism of the NES suppression of panel flutter is studied through energy analysis. Effects of NES parameters on aeroelastic responses of the panel are obtained, and a design technique is adopted to find a suitable combination of parameter values of the NES that suppresses the panel flutter effectively. Results show that the NES can increase or reduce the onset dynamic pressure of the panel flutter and it can reduce the aeroelastic response amplitude effectively within a certain range of dynamic pressure behind the onset dynamic pressure. The installation position of the NES depends on the direction of the airflow. The robust characteristics should be considered to find the suitable combination of parameter values of the NES.

中文翻译：

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使用非线性能量沉被动抑制面板颤动

非线性能量吸收器（NES）用于抑制面板抖动。使用Galerkin方法建立了超声速流中带有NES的二维平板的非线性气动弹性模型。采用一阶活塞气动理论建立气动载荷。使用Lyapunov的间接方法研究NES参数对面板颤动边界的影响。通过能量分析研究了抑制面板颤动的NES机制。获得了NES参数对面板空气弹性响应的影响，并采用一种设计技术来找到NES参数值的合适组合，以有效地抑制面板颤动。结果表明，NES可以增加或减少面板颤振的起始动压，并且可以在起始动压后面一定的动压范围内有效地减小气动弹性响应幅度。NES的安装位置取决于气流方向。应该考虑鲁棒性，以找到NES参数值的适当组合。