摘要
本文针对时域方法只需实测响应信号的特点,对基于环境激励下模态参数识别的时域方法ITD法、随机减量技术进行详细讨论,并针对两种算法的特点,将其结合形成随机减量技术/ITD时域联合算法,使之有效识别环境激励下结构模态参数,并建立混凝土连续梁结构数值模型进行仿真模拟,验证了算法的可行性,为工程实践提供了有益的帮助.
On account of the feature that time-domain method only need actual response signals,the ITD and random decrement technique based on ambient excitation are discussed.Two methods are combined to become a kind of time-domain joint algorithm for structural modal parameter identification effectively.The numerical simulations of a concrete continuous beam are carried out to verify the feasibility of time-domain joint algorithm.The study has important theoretical significance and practical engineering value.
出处
《吉林建筑工程学院学报》
CAS
2011年第2期7-9,16,共4页
Journal of Jilin Architectural and Civil Engineering
基金
吉林省教育厅"十一五"科技研究项目(吉教科合字2010106)
吉林建筑工程学院青年科技发展基金项目(J20091102)
关键词
参数识别
环境激励
随机减量技术
数值仿真
modal parameter identification
ambient excitation
random decrement technique
numerical simulation