摘要
研究环境激励下剪切型结构的层间刚度识别问题,提出了一种新的解决方法.该方法采用自然激励技术实现结构随机响应向确定性响应的过渡;推演了剪切型结构自由振动的参数解耦方程,简化了识别过程、降低了计算量.将自然激励技术、参数解耦方法和扩展卡尔曼滤波算法三者有效结合,为环境激励下剪切型结构的刚度识别提供了一个较好的解决方案.以一个6自由度剪切型结构为例,对该方法进行了数值模拟,结果表明:该方法能比较准确地识别结构层间刚度,可用于剪切型结构健康监测的实际工程.
Inter-story stiffness identification of shearing structures under ambient excitation was studied and a new method was presented.In the method,the transition from structural random response to deterministic response was realized by the natural excitation technique(NExT).The parameter-decoupled free vibration equation of shearing structures was deduced,and the equation could simplify the process of identification and reduce the amount of calculation.Through the effective combination of the NExT,the parameter-...
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2009年第7期928-932,共5页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(50878101)
国家自然科学基金重大研究计划重点资助项目(90715032)
关键词
结构
环境激励
自然激励技术
解耦
卡尔曼滤波
识别
structures
ambient excitation
natural excitation technique
decoupling
Kalman filtering
identification
