OUTPUT-ONLY MODAL PARAMETER IDENTIFICATION BASED ON AUGMENTED STATE SPACE MODELS

摘要：

Augmented stochastic system, consisting of the linear time-varying shaping filter and the original structure, is obtained to consider nonstationarity and non-whiteness of ambient inputs, as well as application of traditional stationary-whitenoise assumption. Influences are that practical measurements have time-varying statistical characteristics, and that eigenvalues associated with inputs appear as spurious poles in the final results. However, eigenfrequencies and mode shapes associated with the underlying structure remain unaffected. Numerical examples have accordant results. All these implicate why classical methods are widely used in civil engineering, whereas the effort of this paper is to obtain more precise theoretical sustainment.

作者: Dan Li Wei-Xin Ren Yi-Ding Hu

作者单位: Department of Civil Engineering,Central South University,Changsha,410075,P.R.China Department of Civil Engineering,Central South University,Changsha,410075,P.R.China Department of Inf

会议类型: 国际会议

会议名称: The International Symposium on Innovation & Sustainability of Structures in Civil Engineering(2011年土木工程结构创新与可持续发展国际会议)

会议地点: 厦门

会议语种:英文

页码: 412-417

在线出版日期: 2011-10-28（万方平台首次上网日期，不代表论文的发表时间）