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A Benchmark Structure for Validation of Experimental Substructuring, Transfer Path Analysis and Source Characterisation Techniques

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Dynamics of Coupled Structures, Volume 4

Abstract

This paper presents a practical study on popular Experimental Dynamic Substructuring topics. A series of substructures is designed of such complexity to fit in right between “real life” structures as often found in industrial applications and “academic” structures which are typically the simplest models to identify a particular phenomenon. The designed benchmark structure comprises an active side with a vibration source, a passive side and a test rig for source characterisation. The connectivity is scalable in complexity, meaning that a single-point, two-point and continuous interface can be established. Substructuring-compatible component models are obtained from impact measurements using the Virtual Point Transformation. The vibration source on the active structure is characterised on the test rig using the in-situ TPA concept. Hereafter the component TPA method is applied to simulate the response on the passive side of the coupled structure, in turn obtained using dynamic substructuring.

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Notes

  1. 1.

    See the paper in the proceedings of SEM IMAC 2017: M. Wernsen et al. An indicator sensor criterion for in-situ characterisation of source vibrations.

  2. 2.

    Bad impacts can for instance be caused by a low impact energy in the frequency range of interest, low signal-to noise ratio, poor reachability with an impact hammer due to geometric constraints, double pulses, etcetera.

  3. 3.

    For an accelerance driving point FRF, the phase should be bounded by 0 and +180∘.

    Fig. 26.7
    figure 7

    Application of dynamic substructuring: assembled FRFs of AB (blue) in two-point coupling configuration, compared against the validation measurement (red). (a ) Driving-point FRF for VP3 in Z-direction. (b ) Transfer FRF for an internal impact point on A to an internal acceleration response on B, both in Z-direction

    Full size image

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Authors and Affiliations

  1. VIBES.technology, Molengraaffsingel 14, 2629, Delft, The Netherlands

    M. V. van der Seijs, E. A. Pasma, D. D. van den Bosch & M. W. F. Wernsen

  2. Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628CD, Delft, The Netherlands

    M. W. F. Wernsen

Authors
  1. M. V. van der Seijs
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  2. E. A. Pasma
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  3. D. D. van den Bosch
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  4. M. W. F. Wernsen
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Editor information

Editors and Affiliations

  1. Department of Engineering Physics, University of Wisconsin, Madison, Wisconsin, USA

    Matthew S. Allen

  2. Structural Dynamics Department, Sandia National Laboratories, Albuquerque, New Mexico, USA

    Randall L. Mayes

  3. Technical University of Munich, Garching, Germany

    Daniel Jean Rixen

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van der Seijs, M.V., Pasma, E.A., van den Bosch, D.D., Wernsen, M.W.F. (2017). A Benchmark Structure for Validation of Experimental Substructuring, Transfer Path Analysis and Source Characterisation Techniques. 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/10.1007/978-3-319-54930-9_26

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  • DOI: https://doi.org/10.1007/978-3-319-54930-9_26

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