基于压电驱动的圆柱壳内振源振动传递控制

Vibration transmission control of vibration source in a cylindrical shell based on piezoelectric actuator

针对圆柱壳内振源振动通过环形支承向壳体传递的问题,提出一种基于压电作动器的主被动支承隔振方案,并通过振源-主被动支承-壳体耦合系统进行振动控制分析。根据Flugge壳理论,采用波传播法建立圆柱壳体振动模型,同时采用有限元方法建立振源及主被动支承的振动模型,最终使用子结构频响函数综合获得耦合系统振动模型。基于耦合系统模型和理想控制假设,在频域给出壳体振动可控性,并通过振源-主被动支承-壳体试验系统验证控制的有效性。仿真与试验结果表明,基于压电作动器的主被动隔振方案能显著降低壳体的宽带和线谱振动。

Here,aiming at the problem of vibration transmission from vibration source inside a cylindrical shell through an annular support to shell body,a piezoelectric actuator-based active/passive support vibration isolation scheme was proposed.Vibration control analysis was performed for a vibration source-active/passive support-shell coupled system.According to Flugge shell theory,a vibration model of a cylindrical shell was established using the wave propagation method.At the same time,a vibration model of vibration source-active/passive support was established using the finite element method.Finally,the coupled system vibration model was obtained by synthesizing substructure frequency response functions.Based on the coupled system model and ideal control assumption,the controll ability of shell vibration was given in frequency domain,and the effectiveness of control was verified by using a vibration source-active/passive support-shell test system.Simulation and test results showed that the proposed active/passive vibration isolation scheme based on piezoelectric actuator can significantly reduce broadband and line spectrum vibration of shell.