An improved direct method for updating structural models based on eigenvectors orthogonality

PDF(1312 KB)

Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (6) : 5-9.

论文

An improved direct method for updating structural models based on eigenvectors orthogonality

GUO xing-lin;GAO hai-yang

Author information +

History +

Abstract

A direct method based on orthogonality conditions for eigenvectors is improved for updating the mass and stiffness matrices of a structural model. Combined with the merit of element method and matrix method, the inner elements associative matrix is presented to make the updated mass and stiffness matrix physically meaningful as the bandwidth and inner elements connection. Dynamic characteristics of the structures can be effectively modified using measured first few eigenmodes. Examples of five-story building and plane frame structure are updated with measured first two and three natural frequency and eigenvectors respectively. It can be easily proved the validity and robustness of this method

Key words

Engineering structure / Model updating / orthogonal eigenvectors / Underdetermined equation

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

GUO xing-lin;GAO hai-yang. An improved direct method for updating structural models based on eigenvectors orthogonality[J]. Journal of Vibration and Shock, 2011, 30(6): 5-9