含传感器脱粘损伤的智能结构响应特性分析  

Analysis of the Characteristic Response of Smart Structures whit Transducer Debonding

作　　者：王帮峰[1] 李迎[1] 蒋雅娜[1] 

机构地区：[1]南京航空航天大学智能材料结构实验室,江苏南京210016

出　　处：《压电与声光》2006年第5期597-600,共4页Piezoelectrics & Acoustooptics

基　　金：航空科学基金资助项目(03I52067);国家自然科学基金资助项目(10072026;90405008)

摘　　要：采用HHT方法对表面粘贴了压电传感器的复合材料悬臂梁进行模态时频域分析,得到结构响应瞬时频率和Hilbert谱,分析了压电片与复合材料基体间不同程度的局部脱胶对结构动态特性的影响。作为比较,还给出了结构试验模态分析和有限元分析结果。研究结果表明,传感器局部开胶对结构的瞬时频率和模态频率等均有明显的影响。与传统方法相比,HHT分析的结果准确稳定,变化趋势清晰,且具有明显的物理含义。An modal analysis in time-frequency domain was performed on the composite laminated cantilever beams with surface bonded piezoelectric ceramic patches using HHT method in this paper. The instantaneous frequencies and Hilbert spectrums of the structures have been obtained to analyze the response characteristic of the structures with varying degree transducers debonding. As a comparison, the results of conventional modal analysis and finite element numerical analysis on the specimens were also given. The research results show that transducer with partially debonding results in clear change of instantaneous frequencies and modality frequencies of the structures, HHT is more effective than conventional methods and can give a more clear physically meaningful interpretation to the structure response.

关 键 词：HHT变换 模态分析 智能结构 压电传感器 脱胶损伤 

分 类 号：O329[理学—一般力学与力学基础]