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The suppression of nonlinear panel flutter response at elevated temperatures using a nonlinear energy sink
Meccanica ( IF 2.7 ) Pub Date : 2021-01-01 , DOI: 10.1007/s11012-020-01269-0
Jian Zhou , Minglong Xu , Jun Zha , Zhichun Yang

A nonlinear energy sink (NES) is used to suppress the nonlinear aerothermoelastic response of panels at elevated temperatures. A nonlinear aeroelastic model for a two-dimensional panel with an NES in a supersonic airflow is established using the Galerkin method, with the aerodynamic load being based on first-order piston aerodynamic theory. The model is then used to study the nonlinear dynamic response behavior of a heated panel with an NES to obtain the NES suppression region. The effects of different NES parameters and temperature elevations on the NES suppression region are examined and a design technique is developed to facilitate finding the most suitable combination of parameter values to suppress the nonlinear panel flutter response. The results show that the NES is effective at reducing the aeroelastic response amplitude within a specific range. Varying the installed position, damping, mass ratio and stiffness of the NES will lead to variations in its controlling effect upon the suppression region and the dynamic behavior of the heated panel. An increase in the temperature elevation results in a decrease in the NES suppression region. When the temperature reaches a certain point, the NES suppression region disappears and the NES no longer has any effect on the panel flutter response. Overall, it is found that an NES provides an effect and robust solution, and a wide range of different parameter combinations can be found, that will meet the requirements identified by the proposed design method.

中文翻译:

使用非线性能量汇抑制高温下的非线性面板颤振响应

非线性能量汇 (NES) 用于抑制面板在高温下的非线性气动热弹性响应。采用伽辽金法建立了超音速气流中NES二维板的非线性气动弹性模型,气动载荷基于一阶活塞气动理论。然后使用该模型研究带有 NES 的加热面板的非线性动态响应行为,以获得 NES 抑制区域。检查了不同 NES 参数和温度升高对 NES 抑制区域的影响,并开发了一种设计技术,以促进找到最合适的参数值组合来抑制非线性面板颤振响应。结果表明,NES 可有效降低特定范围内的气动弹性响应幅度。改变 NES 的安装位置、阻尼、质量比和刚度将导致其对抑制区域和加热板动态行为的控制效果发生变化。温度升高的增加导致 NES 抑制区域的减小。当温度达到某一点时,NES 抑制区域消失,NES 不再对面板颤振响应产生任何影响。总体而言,发现 NES 提供了有效且稳健的解决方案,并且可以找到范围广泛的不同参数组合,这些组合将满足所提出的设计方法确定的要求。NES 的质量比和刚度将导致其对抑制区域和加热板动态行为的控制效果发生变化。温度升高的增加导致 NES 抑制区域的减小。当温度达到某一点时,NES 抑制区域消失,NES 不再对面板颤振响应产生任何影响。总体而言,发现 NES 提供了有效且稳健的解决方案,并且可以找到范围广泛的不同参数组合,这些组合将满足所提出的设计方法确定的要求。NES 的质量比和刚度将导致其对抑制区域和加热板动态行为的控制效果发生变化。温度升高的增加导致 NES 抑制区域的减小。当温度达到某一点时,NES 抑制区域消失,NES 不再对面板颤振响应产生任何影响。总体而言,发现 NES 提供了有效且稳健的解决方案,并且可以找到范围广泛的不同参数组合,这些组合将满足所提出的设计方法确定的要求。当温度达到某一点时,NES 抑制区域消失,NES 不再对面板颤振响应产生任何影响。总体而言,发现 NES 提供了有效且稳健的解决方案,并且可以找到范围广泛的不同参数组合,这些组合将满足所提出的设计方法确定的要求。当温度达到某一点时,NES 抑制区域消失,NES 不再对面板颤振响应产生任何影响。总体而言,发现 NES 提供了有效且稳健的解决方案,并且可以找到范围广泛的不同参数组合,这些组合将满足所提出的设计方法确定的要求。
更新日期:2021-01-01
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