Noh, J.; Hwang, J.-S. Verification of the Mode Decomposition Technique for Closely Distributed Modal Systems in the State Space Domain. Sensors2023, 23, 7123.
Noh, J.; Hwang, J.-S. Verification of the Mode Decomposition Technique for Closely Distributed Modal Systems in the State Space Domain. Sensors 2023, 23, 7123.
Noh, J.; Hwang, J.-S. Verification of the Mode Decomposition Technique for Closely Distributed Modal Systems in the State Space Domain. Sensors2023, 23, 7123.
Noh, J.; Hwang, J.-S. Verification of the Mode Decomposition Technique for Closely Distributed Modal Systems in the State Space Domain. Sensors 2023, 23, 7123.
Abstract
The aim of this study is to propose and validate the state space mode decomposition technique for precise mode separation of non-classical damping systems and closely distributed modal systems. To assess the reliability and applicability of this technique, a 40-story building with a tuned mass damper is investigated, and acceleration responses measured by the building's health monitoring system are used for the verification of the technique. The mode separation results reveal that the separated modal power spectrum becomes distorted at neighboring natural frequency ranges when the performance index only considers the concentration of power spectral energy at the target natural frequency. However, by introducing an augmented performance index that includes a constraint condition to account for distortion, more accurate mode decomposition can be achieved.
Keywords
State-space model; Closely spaced modes; Mode decomposition; Structure-tuned mass damper system; Operational Modal Analysis of high rise building
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
