轴-板耦合系统振动主动控制

Active Vibration Control of a Shaft-plate Coupled System

在推进轴系中,轴系横向振动通过轴承传递至壳体结构并诱导其产生声辐射。为降低壳体声辐射,采用主动作动器抑制轴系横向振动传递。不失一般性,基于哈密顿原理建立轴-板耦合系统动力学模型,对该系统进行功率流分析,识别振动传递主要路径。通过数值仿真,计算该系统的干扰通道和控制通道频响函数,研究该控制方案可行性。采用自适应控制算法,计算主动作动器对板振动抑制效果。仿真结果表明,控制后轴通过轴承向板流入的功率减小,轴-板耦合系统中的功率流方向改变,并且板振动通过主动控制被有效抑制。

In the propulsion shafting system,the lateral vibration of the shaft is transmitted to the hull structure via bearings,which induces radiation sound.In order to reduce the acoustic radiation of the hull structure,an active actuator is used to suppress the lateral vibration transmission.Without losing generosity,the dynamic model of a shaft-plate coupled system is established using Hamilton ′ s principle,and the power flow of the system is analyzed to identify the main path of vibration transmission.Through numerical simulation,the frequency response functions of the disturbance channel and control channel of the system are calculated,and the feasibility of the control scheme is evaluated.With the adaptive control,the effectiveness of the active actuator in suppressing the plate vibration is evaluated.The results show that after the control,the power flowing into the plate through the bearings is reduced,the direction of the power flow in the shaft-plate system is changed and the plate vibration is effectively suppressed by the active control.