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。本文利用实际结构的地震观测记录,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模型对多自由度结构的模态参数识别较为稳定且精度较高;实际应用中多维ARX模型有时会导致丢失模态和虚假模态现象。
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 actual seismic observation records of buildings. The results show that integral ARX model gets stable and highly precise results for structural parameter identification of multi-degree-of-freedom systems, but sometimes the multi-dimensional ARX may induce mode loss and false mode.
出处
《地震工程与工程振动》
CSCD
北大核心
2009年第2期143-149,共7页
Earthquake Engineering and Engineering Dynamics
关键词
ARX模型
地震观测记录
结构参数识别
ARX model
seismic observation records of building
structural parameter identification
作者简介
曹会兰（1982-），女，博士研究生，主要从事在地震和风作用下的结构研究．E—mail：mmchl-132@163．com
