压电类智能结构在船体振动控制方面的应用研究

Application study of the piezoelectric intelligent structures on the hull's vibration control

振动是存在于舰船结构中一个普遍的现象,它所带来的危害一直为人们所关注.根据振动主动控制原理,建立了以PZT为执行器的振动主动控制模型,研究通过控制甲板的边界条件,从而达到减振效果的方法.利用ANSYS软件对建立的实验模型进行了数值仿真研究,搭建物理实验平台,开发了单输入多输出的振动自适应主动控制系统,进行物理实验研究.最后,将实验值与仿真值进行比较分析,验证了该方法的有效性,为船体振动的主动控制提供了一条新的途径.

Vibration is a ubiquitous phenomenon in marine structures,and its harmful effects are attracting more research.In recent years, there has been a great deal of theoretical work and some experiments examining the use of thin piezoelectric crystals laminated to the surfaces of structures for vibration control. Based on the concept of active vibration control and the adaptive proportionate control algorithm,a simplified model with PZT actuators was presented here.The locations of the piezoelectric actuators were confirmed and the method for vibration suppression purpose of the deck by changing its boundary condition was studied.Then the numerical simulation of experimental model was carried out by using software ANSYS and a physics experimental platform was set up.An adaptive single-input multi-output control system was developed and a model test carried out.Ultimately the method was proved to be effective and enforceable by comparing experimental and simulated results,which show that the vibration displacement amplitude decreases 50 to 75 percent and the effect will be enhanced by increasing the driving voltage or the amount of piezoelectric actuators. This study provides a new way for the hull's vibration active control.