摘要
针对实际工程中所应用的某锥壳模型,利用平面板单元对其进行有限元建模,将分布式压电作动器的影响作为动力学边界条件加入模型当中;试验数据与理论计算结果对比证明该方法能够满足精度要求,此外与通常的层合理论建模方法相比,该方法更加简洁,降低了计算量;利用基于独立模态空间的负速度反馈控制方法对锥壳结构进行了振动主动控制研究,仿真结果可以看出利用少数作动器即可达到理想的控制效果。由于控制器本身比较简单,具有很好的鲁棒性,因此对于实际工程应用具有非常重要的指导意义。
In order to investigate a real conical shell model, plate element is used for the finite element method （FEM） modeling and the influence of distribute piezoelectric actuator is regarded as the boundary conditions in the mathematical modeling. Results of mode calculations with finite element model are accurate enough for engineering applications when compared with experimental results. The method in this paper is much simpler than the laminate method modeling with less calculation. The investigation of active control is based on the negative velocity feedback control in the independent modal space. Results of simulations suggested that the control method is efficient with a limited number of piezoelectric actuators. The controller can be used for reference of engineering applications because it is simole and has well robust.
出处
《工程力学》
EI
CSCD
北大核心
2008年第10期235-240,共6页
Engineering Mechanics
基金
"十五"预先研究项目(41320020302)
关键词
振动控制
主动控制
有限单元法
锥壳结构
压电材料
vibration control
active control
finite element method
conical shell
piezoelectric material
