Abstract
In many engineering application there are many instances in which it is convenient to be able to consider a complex engineering structure as an assembly of simpler components or substructures. Similarly, there exist applications in which, for model validation purposes, it might be important to identify the dynamic behavior of the structural subsystem starting from the known dynamic behavior of the coupled system and from information about the remaining part of the structural system. However, if the theoretical framework for Frequency Based Substructuring (FBS) has been widely studied and demonstrated, measurement errors, ill-conditioning and difficulties in measuring all required degrees of freedom—in particular at the connections—lead to poor results when trying to apply these techniques to real structures. This paper will focus on the analysis of the results obtained by applying Experimental Frequency-Based Substructuring on a test structure, both for coupling and decoupling applications and under different boundary conditions. The paper will particularly discuss the effects of typical measurement errors on the final results and potential techniques that could be used to improve the robustness and applicability of this methodology.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Rohe, D.P., Allen, M.S.: Investigation of the effectiveness of using an experiment to validate experimental substructure models. Mech. Syst. Signal Process. 43, 192–216 (2014)
Allen, M.S., Gindlin, H.M., Mayes, R.L.: Experimental modal substructuring to estimate fixed-base modes from a tests on a flexible fixture. J Sound Vib 330, 4413–4428 (2011)
Peeters, P., Tamarozzi, T., Vanhollebeke, F., Desmet, W.: In: A robust approach for substructure decoupling. In: Proceedings of the International Seminar on Modal Analysis (ISMA), Leuven (2014)
De Klerk, D., Rixen, D., Voormeeren, S.N.: General framework for dynamic substructuring: history, review and classification of techniques. AIAA J. 46(5), 1169–1181 (2008)
Nicgorski, D., Avitabile, P.: Experimental issues related to frequency response function measurements for frequency-based substructuring. Mech. Syst. Signal Process. 24, 1324–1337 (2010)
Rixen, D.J.: How measurement inaccuracies induce spurious peaks in frequency based substructuring. In: Proceedings of the International Modal Analysis Conference (IMAC), Jacksonville (2010)
Jetmundsen, B., Biewala, R., Flannelly, W.: Generalized frequency domain substructure synthesis. J. Am. Helicopter Soc. 33(1), 55–65 (1988)
Voormeeren, S.N., Rixen, D.J.: A dual approach to substructure decoupling techniques. In: Proceedings of the International Modal Analysis Conference (IMAC), Jacksonville (2010)
D’Ambrogio, W., Fregolent, A.: The role of interface DoFs in decoupling of substructures based on the dual domain decomposition. Mech. Syst. Signal Process. 24(7), 2035–2048 (2010)
De Klerk, D., Rixen, D., Voormeeren, S.N., Pasteuning, F.: Solving the RDoF problem in experimental dynamic substructuring. In: Proceedings of the International Modal Analysis Conference (IMAC), Orlando (2008)
D’Ambrogio, W., Fregolent, A.: Ignoring rotational dofs in decoupling structures connected through flexotorsional joints. In: Dynamics of Coupled Structures. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 4, pp. 57–69. Springer, Berlin (2015)
Choi, H.G., Thite, A.N., Thompson, D.J.: A threshold for the use of Tikhonov regularization in inverse force determination. Appl Acoust 67, 700–719 (2006)
Manzato, S., Risaliti, E., Napoli, C., Tamarozzi, T., Peeters, B.: A review of frequency-based substructuring methods and their applicability to engineering structures. In: Proceedings of the International Conference on Structural Engineering Dynamics (ICEDyn) 2015, Lagos (2015)
Milana, S., Fregolent, A., Culla, A.: Observation dofs optimization for structural forces identification. In: Model Validation and Uncertainty Quantification. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 3, pp. 27–34. Springer, Berlin (2015)
El-Kafafy, M., De Troyer, T., Peeters, B., Guillaume, P.: Fast maximum-likelihood identification of modal parameters with uncertainty intervals: a modal model-based formulation. Mech. Syst. Signal Process. 37, 422–439 (2013)
El-Kafafy, M.E., Accardo, G., Peeters, B., Janssens, K., De Troyer, T., Guillaume P.: A fast maximum likelihood-based estimation of a modal model. In: Proceedings of the International Modal Analysis Conference (IMAC), Orlando (2015)
Acknowledgements
This research was conducted in the frame of the project IWT 130936 ADVENT (Advanced Vibration Environmental Testing). The financial support of the IWT (Flemish Agency for Innovation by Science and Technology) is gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2016 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Manzato, S., Napoli, C., Coppotelli, G., Fregolent, A., D’Ambrogio, W., Peeters, B. (2016). Experimental Coupling and Decoupling of Engineering Structures Using Frequency-Based Substructuring. In: Allen, M., Mayes, R., Rixen, D. (eds) Dynamics of Coupled Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-29763-7_45
Download citation
DOI: https://doi.org/10.1007/978-3-319-29763-7_45
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-29762-0
Online ISBN: 978-3-319-29763-7
eBook Packages: EngineeringEngineering (R0)