压电智能结构冲击荷载谱的反演方法  

Inverse Method of Identifying Impact Load Spectrums on Piezoelectric Smart Structures

作　　者：周晚林[1,2] 王鑫伟[1] 胡自力[1] 

机构地区：[1]南京航空航天大学智能材料与结构航空科技重点实验室 [2]盐城工学院基础部盐城,224003

出　　处：《振动工程学报》2004年第3期291-295,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目 (编号 :10 0 72 0 2 6 ;5 0 135 0 30 );航空科学基金资助项目 (编号 :0 1G5 2 0 4 1)

摘　　要：基于对智能层合板结构的模态分析 ,提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。介绍了压电模态传感器的实现原理 ,并给出了由实测压电单元输出得到结构模态响应的计算公式。采用无条件稳定的精细逐步积分法求解结构的模态动力学微分方程 ,构造了通过结构的模态响应直接反求荷载列阵的迭代算法。该方法迭代过程简单可靠、计算速度快、识别精度高 ,适用于任意形状和边界条件的复杂智能结构。实例表明了该方法的可行性。Based on modal analysis of piezoelectric smart laminated plates, an FEM (finite element method) based on inverse algorithm of the time history of impact loads by piezoelectric modal respondence is presented. The principle of piezoelectric modal sensor is introduced and the formulas of calculating modal respondence by measured piezoelectric outputs are gained. The highly precise direct integration scheme is used for solving modal dynamic differential equation of the structure and a dynamic load identification method by the modal respondence is proposed. The method is simple, credible and has high precision and rapid calculation convergency. An example of identifying impact loads shows that the method is effective.

关 键 词：智能层合板 载荷识别 压电模态分析 逐步积分法 反演 分层损伤 

分 类 号：O346.5[理学—固体力学]