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Suppression of panel flutter response in supersonic airflow using a nonlinear vibration absorber
International Journal of Non-Linear Mechanics ( IF 3.2 ) Pub Date : 2021-03-16 , DOI: 10.1016/j.ijnonlinmec.2021.103714
Jian Zhou , Minglong Xu , Zhichun Yang , Yingsong Gu

A nonlinear vibration absorber (NVA) is used to suppress the nonlinear response of a panel flutter in supersonic airflow. The nonlinear aeroelastic equations of a three-dimensional (3-D) panel with an NVA are established using Galerkin’s method, with the aerodynamic load being based on the piston aerodynamic theory. We use the aeroelastic equations to study the nonlinear aeroelastic response behaviors of the 3-D panel with an NVA and then obtain the NVA suppression region. The effects of different NVA parameters on the flutter boundary and the NVA suppression region are examined, and a design technique is developed to find a suitable combination of parameter values to suppress the nonlinear panel flutter response. The results show that the nonlinear aeroelastic responses of the panel are completely suppressed by recurrent transient resonance capture (TRC) and permanent resonance capture (PRC) of the NVA in the NVA suppression region. The phase difference between the transient energy of the panel and the NVA is nearly 180° in PRC. The NVA can suppress the aeroelastic response amplitude of the panel sufficiently only if the transient energy of the panel and NVA are comparable. The NVA parameters can affect the flutter boundaries and the NVA suppression regions with different patterns. The expected suppression response amplitude should be considered in designing the NVA parameters.



中文翻译:

使用非线性减振器抑制超音速气流中的面板颤动响应

非线性减振器(NVA)用于抑制超音速气流中面板颤振的非线性响应。使用Galerkin方法建立了具有NVA的三维(3-D)面板的非线性气动弹性方程,其气动载荷基于活塞气动理论。我们使用气动弹性方程来研究具有NVA的3-D面板的非线性气动弹性响应行为,然后获得NVA抑制区域。研究了不同NVA参数对颤振边界和NVA抑制区域的影响,并开发了一种设计技术来找到合适的参数值组合,以抑制非线性面板颤动响应。结果表明,在NVA抑制区域中,NVA的反复瞬态共振捕获(TRC)和永久共振捕获(PRC)完全抑制了面板的非线性气动弹性响应。面板的瞬态能量和NVA之间的相位差在PRC中接近180°。仅当面板的瞬态能量与NVA相当时,NVA才能充分抑制面板的气动弹性响应幅度。NVA参数可以用不同的模式影响颤振边界和NVA抑制区域。在设计NVA参数时应考虑预期的抑制响应幅度。面板的瞬态能量和NVA之间的相位差在PRC中接近180°。仅当面板的瞬态能量与NVA相当时,NVA才能充分抑制面板的气动弹性响应幅度。NVA参数可以用不同的模式影响颤振边界和NVA抑制区域。在设计NVA参数时应考虑预期的抑制响应幅度。面板的瞬态能量和NVA之间的相位差在PRC中接近180°。仅当面板的瞬态能量与NVA相当时,NVA才能充分抑制面板的气动弹性响应幅度。NVA参数可以用不同的模式影响颤振边界和NVA抑制区域。在设计NVA参数时应考虑预期的抑制响应幅度。

更新日期:2021-03-25
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