摘要
结构参数识别是结构抗震安全性能鉴定和健康诊断的基础。利用地震观测记录来识别结构模态参数,是地震工程领域备受关注的研究课题之一。本文利用三层平面框架结构的理论地震反应时程,对一维、多维和整体ARX模型三种模态参数识别方法进行了对比分析。结果表明:整体ARX模型的识别结果较为稳定且精度较高,更适合于进行多自由度结构参数识别。
Structural parameter identification is the basis of safety assessment for earthquake-resistance and health diagnosis of structures. Structural modal parameter identification using seismic observation records receives full attention in earthquake engineering. In this paper, modal parameter identification methods of one-dimensional, multi-dimensional and integral ARX models are compared and analyzed by using the seismic responses of the three- story plane frame structure. The results show that： integral ARX model gives stable and highly precise results, which is more suitable for structural parameter identification of multi-degree of freedom systems.
出处
《地震工程与工程振动》
CSCD
北大核心
2009年第1期123-129,共7页
Earthquake Engineering and Engineering Dynamics
关键词
ARX模型
理论地震反应时程
结构参数识别
ARX model
theoretical time - history of seismic response
structural parameter identification
