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。
Abstract
To attenuate vibration transmission along the annular support in a compact shell, an active/passive vibration isolation support with piezoelectric actuators is proposed. The analysis of vibration control is carried out on the basis of the dynamic model of the vibration source-active/passive support-cylindrical shell system. The cylindrical shell is modeled by the Flugge shell theory and the wave propagation method. The vibration source, active/passive support, etc. are modeled by the finite element method. The coupled model is established on the frequency response functions of the subsystems. Based on the coupled model and ideal control assumption, the feasibility of active vibration control is investigated in the frequency domain. A vibration source-active/passive support-cylindrical shell experimental systemis constructed to verify the effectiveness of the control method. Simulation and experimental results show that the active/passive support vibration isolation support with piezoelectric actuators can significantly attenuate wide-band and line spectrum vibration of the shell.
关键词
主动控制 /
压电驱动 /
振动传递 /
圆柱壳体
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Key words
Active vibration control /
Piezoelectric actuator /
Vibration transmission /
Cylindrical shell
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