Error analysis and feasibility study of dynamic stiffness matrix-based damping matrix identification

Date

2009-02-06

Author

Özgen, Gökhan Osman

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Developing a method to formulate a damping matrix that represents the actual spatial distribution and mechanism of damping of the dynamic system has been an elusive goal. The dynamic stiffness matrix (DSM)-based damping identification method proposed by Lee and Kim is attractive and promising because it identifies the damping matrix from the measured DSM without relying on any unfounded assumptions. However, in ensuing works it was found that damping matrices identified from the method had unexpected forms and showed traces of large variance errors. The causes and possible remedies of the problem Lire sought for in this work. The variance and leakage errors are identified as the major sources of the problem, which Lire then related to system parameters through numerical and experimental simulations. An improved experimental procedure is developed to reduce the effect of these errors in order to make the DSM-based damping identification method a practical option.

Subject Keywords

Mechanical Engineering, Acoustics and Ultrasonics, Mechanics of Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/47845

Journal

Journal of Sound and Vibration

DOI

https://doi.org/10.1016/j.jsv.2008.07.021

Collections

Department of Mechanical Engineering, Article

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Citation Formats

G. O. Özgen, “Error analysis and feasibility study of dynamic stiffness matrix-based damping matrix identification,” Journal of Sound and Vibration, pp. 60–83, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47845.