激励信号特征对随机子空间方法结构模态识别的影响  

The Effects of the Excitation Signature on Structure Modal Identificaton Using Stochastic Subspace Method

作　　者：董钢[1] 王建国[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《河南大学学报（自然科学版）》2011年第3期327-330,共4页Journal of Henan University:Natural Science

基　　金：国家自然科学基金资助项目(10572046)

摘　　要：利用MATLAB软件产生不同分布特征的白噪声激励信号,基于商用程序ANSYS对一简支梁在环境激励下的动态响应进行仿真模拟,根据该梁的结构响应信号利用SSI方法实现其模态参数识别,分析了不同白噪声激励信号的离散程度和零均值误差对SSI模态参数识别方法的影响.Using MATLAB software,some white noise excitation signals with different distribution characteristics were produced.Based on commercial program ANSYS,a simply supported beam was excited in the environment and the dynamic response simulation was implemented.According to the structural dynamic response of the beam,modal parameters of the beam was identified using SSI.The analysis of different degree of dispersion of white noise excitation signal and the zero mean error on the modal parameter identification method SSI effects were produced.

关 键 词：SSI方法 环境激励 白噪声信号 统计特征 

分 类 号：TU311.4[建筑科学—结构工程]