ANSYS在压电智能板振动主动控制中的应用

Application of ANSYS in active vibration control of smart structure

利用ANSYS软件对粘贴有压电材料的智能板结构建立有限元模型,通过瞬态动力学分析(时间历程分析)并编写APDL(ansys parameter design language)程序实现了对智能板的振动控制仿真。首先定义程序所需要的荷载步,并利用每一荷载步下的节点应变作为反馈信号传给压电片,考虑到板是二维结构,其节点应变可用节点挠度的二阶差分来代替。仿真结果表明了该方法的合理性,为进一步研究智能结构振动主动控制奠定了良好的基础。

The finite element model of smart structures with piezoelectric materials is established by ANSYS software. The vibration control of structure has become true through compiling the APDL（ansys parameter design language） program and using transient dynamic analysis （time-history analysis）. Firstly, the program defines the each load step and the instantaneous value of the strain at the sensors locations at each time step is acted as the feedback signal. The value is multiplied by the control gain to calculate the voltage value, which is used as the input to the actuator. Considered the two-dimensional plate structure, the node strain can be expressed by the second order difference of the node displacement. The simulation investigation has proved the valid of the method, and provides the basis of further investigation of active vibration control of smart plate.