摘要
目前在ACLD薄壳结构的动力学分析中,通常采用一种忽略压电约束层面内电场强度,仅考虑在厚度方向为常量分布的法向电场强度的简化力电耦合模型。首先从理论上分析了简化力电耦合模型的局限性,进而提出了一种新的完全力电耦合模型,以此为基础导出了该模型下ACLD圆柱壳的一阶常微分矩阵状态方程,并结合传递矩阵法和齐次扩容精细积分法求解该方程。相对于传统三维模型方法,所建立的新模型和求解方法不仅大幅度简化了计算,而且适用于分析部分覆盖和任意支承条件下ACLD圆柱壳的振动控制问题。最后通过数值算例对完全力电耦合模型和简化力电耦合模型进行了比较,结果表明:简化力电耦合模型仅适用于低频分析;完全力电耦合模型具有更宽的频率适应性。
The commonly used model for dynamic analysis of the shell with active constrained layer damping（ACLD） is a simply coupled electro-mechanical model（SCEM）.In this model the electric field is assumed to be negligible in the in-plane directions of piezoelectric layer and to be constant throughout the thickness in the normal direction.The reason for ineffectiveness of SCEM was analyzed theoretically and a fully coupled electro-mechanical model（FCEM） was further developed.Then a first-order differential matrix equation for FCEM of thin ACLD circular cylindrical shell was derived.A high precision and high efficiency transfer matrix method based on the extended homogeneous capacity precision integration approach was employed to solve the matrix equation.Compared with the classical 3D method,the proposed method can greatly simplify computation,and can be applied to analyze the vibration control problems of thin circular cylindrical shell partially treated with ACLD under arbitrary boundary conditions.Numerical results were given to compare the two kinds of models（SCEM and FCEM） in a wider frequency range.The results by both models agree exactly in the low-frequency range,whereas differ significantly in the high-frequency range.This confirms sufficiently SCME is only applicable to low-frequency vibration problems while FCEM can be used in a wider frequency range.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第6期147-152,共6页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(10662003)
关键词
力电耦合
主动约束层阻尼
圆柱壳
传递矩阵法
振动控制
electro-mechanical coupling
active constrained layer damping（ACLD）
circular cylindrical shell
transfer matrix method
vibration control
