电流变体-砂浆复合梁结构的振动特性研究  

Vibration performance of electrorheological fluid-mortar cantilever beams

作　　者：逯静洲[1] 李庆斌[2] 

机构地区：[1]烟台大学土木系,山东烟台264005 [2]清华大学水利系,北京100084

出　　处：《地震工程与工程振动》2005年第1期54-57,共4页Earthquake Engineering and Engineering Dynamics

基　　金：国家杰出青年基金项目(50225927);北京市自然科学基金项目(8022011);中国博士后科学基金项目;教育部科学技术研究重点项目

摘　　要：利用电流变体作为驱动元件与基体砂浆材料结合制成智能悬臂梁结构,调节施加在电流变体上的电压,用锤击法瞬态击振测定其在不同电场强度下的自振频率,对频率随电场强度的变化规律进行了研究。实验结果表明电流变片埋置位置对复合梁的整体振动特性的影响比较大。A mortar cantilever with filled electrorheological fluid was made to investigate the natural vibration frequency by hammering test. The changing rule of frequencies under different electric field intensity was analyzed. The main factors influencing the natural frequencies of the composite beams were examined. The experimental results indicate that the first and second order natural frequencies increased apparently with the increase of electric field intensity, however, the third order one is changeless. Moreover the position of electrorheological piece embedded in mortar beams has a lot of influence on the vibration performance. In addition, the physical mechanism why the changing of the applied voltage can alter the frequency of composite beam was discussed. This research sets up an experimental basis for the application of electrorheological fluid to the field of vibration control in civil engineering practice.

关 键 词：电流变体 砂浆 复合梁 频率 

分 类 号：P315.976[天文地球—地震学]