基于试验的土木工程结构动态参数识别  

Dynamic parameter identification of engineering structure on experiment

作　　者：徐志谦[1] 李涛[1] 伍德挺[1] 

机构地区：[1]厦门大学,厦门361005

出　　处：《福建建筑》2009年第8期27-30,共4页Fujian Architecture & Construction

摘　　要：结构动态参数识别是工程、特别是重大工程质量和寿命全过程监控的核心研究内容。本文基于试验基础上,直接利用环境激励下的土木工程结构振动响应数据,用时间序列法ARMA模型进行动态参数识别。首先结合有限元分析,对一个简支梁结构进行识别,数值分析对比表明:二者在动态参数识别上具有高度的一致性。此后,利用无线传感技术对厦门大学人行天桥进行环境振动测试,分析表明:ARMA模型能够在传统动态参数试验难以进行的环境下,准确有效地识别工程结构的动态参数。此方法为结构的健康损伤识别、在线监测等提供动态参数,具有一定的工程应用价值。Dynamic parameter identification and signature extraction of structures have become a key research topic, especially for the health monitoring of infrastructures. First, a simple - supported beam bridge is identified with the use of Finite Element Analysis, and the results of the two experiments were highly consistent. Then, experiment using wireless sensing is done on the Xiamen University pedestrian over - crossing bridge, the analysis on the ambient vibration tests of experiment indicated that time series ARMA model can exactly and validly identify model parameters of engineering structure under circumstances which may be difficult for traditional model experiment to process, and with these merits it can be proved valuable in engineering application for providing dynamic parameters for on - line monitor and active control of engineering structure.

关 键 词：环境激励 时间序列法 ARMA模型 动态参数识别 无线传感 

分 类 号：TU317[建筑科学—结构工程]