Abstract
In operational modal analysis the input forces are unknown so the modes shapes are obtained with an arbitrary normalization. In some applications the mass normalized modes shapes are required and the scaling factors have to be estimated. A way of obtaining these factors is to modify the modal properties of the structure by introducing changes in the mass or stiffness; mass change is usually the most convenient way to modify the structural properties in a controlled manner. Different strategies and approaches to perform the mass change method have been proposed in recent years. In this work the scaling factors of a 15 tonnes concrete slab strip are obtained using several equations proposed by different authors and the results are compared. The results show that the scaling factors can be estimated with reasonable accuracy using the different equations if a good mass change strategy is applied.
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Fernández, P., Reynolds, P., Aenlle, M.L. (2011). Experimental Evaluation of Mass Change Approaches for Scaling Factors Estimation. In: Proulx, T. (eds) Dynamics of Civil Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9831-6_13
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DOI: https://doi.org/10.1007/978-1-4419-9831-6_13
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