为了完善在夹层壁板的芯层安装微型动力吸振器来抑制壁板颤振这一新方案,研究了吸振夹层壁板中悬臂梁式动力吸振器的频率设计方法.基于壁板颤振的模态耦合机理,分别以单频率设计和双频率设计原则来确定吸振夹层壁板的吸振器频率.结果表明,所有微型吸振器按单频率设计时,存在一个不等于原夹层壁板颤振耦合模态频率和颤振频率的吸振器最佳设计频率,使得吸振夹层壁板的颤振速度最大;微型吸振器按双频率设计时,吸振夹层壁板的最大颤振速度远大于按单频率设计的最大颤振速度.%A novel scheme for panel flutter suppression was proposed here. In this scheme the panel was designed as a sandwich panel incorporated with distributed micro beam-type dynamic absorbers acting as its core layer. To improve this scheme, the frequency design method for a dynamic absorber was investigated in the present study. Based on the mode-coupling mechanism of panel flutter, the frequency design of dynamic absorber was performed according to a single- frequency design scheme and a double-frequency design scheme, respectively. Numerical simulation results showed that when all the micro dynamic absorbers were designed with the single-frequency design scheme, a maximum flutter speed for the sandwich panel could be achieved at the optimal absorber frequency, which was different from the flutter frequency or the natural modal frequencies of the original sandwich panel; and when the micro dynamic absorbers were designed with the double-frequency design scheme, a maximum flutter speed of the sandwich panel was much bigger than that obtained using the single-frequency design scheme.
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