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Output-only de-tuning assessment of tuned mass dampers

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Abstract

In this paper, an algorithm to assess the de-tuning of tuned mass dampers (TMD) while in operation is proposed. De-tuning of such smart structures occurs due to several reasons such as accidental changes in operating conditions or deterioration of the current modal properties which leads to significant loss of its performances. An accurate assessment of its de-tuning is needed to replace or re-tune TMDs. In the present work, a class of performance measures (PM) that are primary indicators of detuning is identified through an extensive parametric study followed by a regression model in which the PMs are regressed with the level of de-tuning. Principal component regression analysis is employed to eliminate co-linearity of the PM’s, in which the PMs are de-correlated through rotational transformation and a probabilistic de-tuning model is developed. Such regression model is extremely useful in detecting the detuning using the selected PMs based on the measurement alone. Experimental studies with the proposed algorithm on a laboratory set-up show promising results which makes it a potential candidate in structural health monitoring applications.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON, Canada

    Budhaditya Hazra & Ayan Sadhu

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  1. Budhaditya Hazra
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  2. Ayan Sadhu
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Correspondence to Budhaditya Hazra.

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Hazra, B., Sadhu, A. Output-only de-tuning assessment of tuned mass dampers. J Civil Struct Health Monit 3, 33–48 (2013). https://doi.org/10.1007/s13349-012-0031-2

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  • DOI: https://doi.org/10.1007/s13349-012-0031-2

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