含电流变体砂浆复合悬臂梁结构的振动分析  

Free vibration analysis of a cantilever mortar beam with electrorheological fluid in a central crack

作　　者：逯静洲[1] 李庆斌[2] 张文翠[2] 

机构地区：[1]烟台大学土木工程系,烟台264005 [2]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2004年第9期1235-1239,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家杰出青年科学基金项目 ( 5 0 2 2 5 92 7) ;中国博士后科学基金项目 ( 2 0 0 2 -17) ;北京市自然科学基金资助项目 ( 80 2 2 0 11)

摘　　要：直接将电流变体埋置在砂浆梁中制成智能复合悬臂梁结构 ,用锤击法测定其在不同电场强度下整体结构的自振频率 ,对频率随电场强度的变化规律进行了实验研究。结果表明电场强度对第一、二阶频率影响比较明显。同时 ,利用一种以线弹簧模型为基础的分析裂纹梁动态响应的新方法对这种复合结构进行了数值分析 ,得到的解析解与实验结果比较一致。The natural vibration frequency of a mortar cantilever beam filled with a electrorheological (ER) fluid was investigated using the hamming test. The tests analyzed the frequency changes for different electric field intensities. The results indicate that the first and second order natural frequencies increase with increasing electric field intensity, but the third order frequency remains unchanged. In addition, numerical analyses using a revised cracked-beam theory based on the line-spring model indicated that the analytical results are in excellent agreement with experimental results. The results provide an experimental and theoretical basis for the application of ER fluids for vibration control in engineering practice.

关 键 词：智能结构 电流变体 裂纹梁 自振频率 

分 类 号：TU352.11[建筑科学—结构工程]