悬臂式刚度自调谐吸振器动力学特性研究

根据轴力变化对悬臂式结构固有频率的改变规律，设计一种由压电材料驱动的刚度自调谐动力吸振器。首先，研究适用于这类吸振器的半主动控制方法，分别采用逐步寻优和遗传控制算法对吸振器固有振动频率进行实时调节；其次，结合实际受控系统进行动力学仿真分析；最后，在获得有效振动抑制的基础上进一步将吸振器应用于风洞测力模型的振动控制试验研究。试验结果表明：吸振器能够将风洞测力模型端部振动抑制效果提高至40dB以上，与其他类型的振动控制器相比具有更为优异的动力学性能。

Dynamic Characteristics of Cantilever Self-tuning Vibration Absorber with Variable Stiffness

A new type of cantilever self-tuning vibration absorber with variable stiffness driven by piezoelectric material is designed, which is based on the principle that the natural frequency of the cantilever structure varies under different axial forces. The progressive optimization and genetic control algorithms are used to adjust the natural vibration frequency of the absorber in real time, and the dynamic simulation analysis is combined with the actual controlled system. Finally, the dynamic properties of the vibration absorber is further evaluated installed on wind tunnel aerodynamic models based on the effective vibration suppression of simulation analysis. The results show that the absorber can effectively attenuate vibration in a wide frequency range, and the highest damping effect reaches more than 40 dB, that has a better kinetic performance than other types of vibration controllers.