A New Algorithm for the System Identification of Shear Structures
In general terms, the aim of System Identification is to determine the dynamic characteristics of mechanical systems. These characteristics include both frequency characteristics (frequencies, mode shapes, and damping ratios) and the systems characteristic matrices (the matrices of mass, viscous damping, stiffness, Coulomb damping or coefficients of friction, and the Duffing stiffness). In such fields as Damage Detection in structures, identification of the systems characteristic matrices is of the same importance as the identification of the frequency characteristics, or even more so, by identifying these matrices, the intended goals in Damage Detection can be achieved. In line with such identification, a new algorithm for the system identification of shear structures is presented in the paper. Taking into account the fundamental and significant effect of noise attenuation in boosting the levels of precision and the correctness of system identification, this method helps to achieve noise attenuation by trimming noisy records in the frequency domain, in parallel with the identification of the structural system. The efficiency and precision of the method have been examined through the application of a closed loop solution to a five storey model of shear structure.
system identification shear structure diagonalization noise reduction Fourier transform
Behnam Adhami Hamed Niroumand Karen Khanlari
Department of Civil Engineering, Central Tehran Branch, Islamic Azad University, Tehran Department of Geotechnical Eng., Faculty of Civil Engineering, Universiti Teknologi Malaysia
国际会议
沈阳
英文
495-499
2011-11-22（万方平台首次上网日期，不代表论文的发表时间）