Autonomous modal analysis - A method for experimental Modal Analysis using self-generated excitation

A. Colombo, E. Bianchi, M. Scaccabarozzi, D. J. Ewins, A. Cigada, S. Manzoni, A. Delli Carri

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Abstract

A method is presented to extend the well-known techniques and procedures used for Experimental Modal Analysis (EMA) to cases where the excitation forces are generated autonomously by the system under investigation. This method is referred to as Autonomous Modal Analysis (AMA). In some practical cases, it can be difficult to implement the EMA approach because the excitation system may interfere with the test structure and alter its boundary conditions. In order to overcome these limitations, the AMA method presented here is based on the use of dynamic exciting forces generated by an actuator mounted internally in the system, as a part of it. A new type of response function is introduced (the Reactive Response Function, RRF) and the AMA theory is developed in full. The AMA methodology is demonstrated using an extensive numerical simulation study, addressing a full range of damped structures, with universally good results which closely match those obtained applying EMA to the same test cases.

Original languageEnglish
Title of host publicationProceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics
PublisherKU Leuven
Pages2421-2436
Number of pages16
ISBN (Electronic)9789073802919
Publication statusPublished - 2014
Externally publishedYes
Event26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014 - Leuven, Belgium
Duration: 15 Sep 201417 Sep 2014

Conference

Conference26th International Conference on Noise and Vibration Engineering, ISMA 2014, Including the 5th International Conference on Uncertainty in Structural Dynamics, USD 2014
CountryBelgium
CityLeuven
Period15/09/1417/09/14

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Acoustics and Ultrasonics

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  • Cite this

    Colombo, A., Bianchi, E., Scaccabarozzi, M., Ewins, D. J., Cigada, A., Manzoni, S., & Delli Carri, A. (2014). Autonomous modal analysis - A method for experimental Modal Analysis using self-generated excitation. In Proceedings of ISMA 2014 - International Conference on Noise and Vibration Engineering and USD 2014 - International Conference on Uncertainty in Structural Dynamics (pp. 2421-2436). KU Leuven.