Numerical Investigation of a Reluctance Force Shunt Damping System

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • Martin Jahn
  • Sebastian Tatzko
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Details

Original languageEnglish
Title of host publicationNonlinear Structures and Systems
Subtitle of host publicationProceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024
EditorsMatthew R. W. Brake, Ludovic Renson, Robert J. Kuether, Paolo Tiso
PublisherSpringer
Pages121-124
Number of pages4
ISBN (electronic)978-3-031-69409-7
ISBN (print)9783031694080
Publication statusPublished - 8 Aug 2024
Event42nd IMAC, A Conference and Exposition on Structural Dynamics, IMAC 2024 - Orlando, United States
Duration: 29 Jan 20241 Feb 2024

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (electronic)2191-5652

Abstract

In this chapter, an electromagnetic energy transducer for vibration damping is investigated. The device consists of a magnetic circuit, a flux linking coil, and a variable air gap between a fixed horseshoe type magnet with a moving magnetic core. Due to the magnetic effect caused by the reluctance forces in the air gap, the horseshoe magnet and its counterpart attract each other. The corresponding force–displacement behavior is strongly nonlinear and can be characterized as negative stiffness. We now introduce passive shunts of the coil to create a phase shift in the reluctance force dynamics. This way, the resulting hysteresis between reluctance force and air gap causes damping of an oscillating motion of the moving magnetic core. The nonlinear state equation is solved by applying the harmonic balance method to obtain the magnetic flux for a given harmonic input signal. For harmonic air gap oscillation, resistive as well as resonant shunts are considered at different frequencies. In contrast to a simple energy dissipation, the resonant shunt leads to an amplification of the damping effect as the electric circuit is capable of vibration itself. Furthermore, additional resonance effects can occur if the oscillation frequency is close to, for example, half or one-third of the electrical resonance frequency. This is due to the strong nonlinear characteristic of the system activating the electric resonance with the oscillation’s higher harmonics.

Keywords

    Harmonic balance method, Higher harmonic excitation, Magnetic damper, Reluctance force, Shunt damping

ASJC Scopus subject areas

Cite this

Numerical Investigation of a Reluctance Force Shunt Damping System. / Jahn, Martin; Tatzko, Sebastian.
Nonlinear Structures and Systems : Proceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024. ed. / Matthew R. W. Brake; Ludovic Renson; Robert J. Kuether; Paolo Tiso. Springer, 2024. p. 121-124 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Jahn, M & Tatzko, S 2024, Numerical Investigation of a Reluctance Force Shunt Damping System. in MRW Brake, L Renson, RJ Kuether & P Tiso (eds), Nonlinear Structures and Systems : Proceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024. Conference Proceedings of the Society for Experimental Mechanics Series, Springer, pp. 121-124, 42nd IMAC, A Conference and Exposition on Structural Dynamics, IMAC 2024, Orlando, United States, 29 Jan 2024. https://doi.org/10.1007/978-3-031-69409-7_21
Jahn, M., & Tatzko, S. (2024). Numerical Investigation of a Reluctance Force Shunt Damping System. In M. R. W. Brake, L. Renson, R. J. Kuether, & P. Tiso (Eds.), Nonlinear Structures and Systems : Proceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024 (pp. 121-124). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer. https://doi.org/10.1007/978-3-031-69409-7_21
Jahn M, Tatzko S. Numerical Investigation of a Reluctance Force Shunt Damping System. In Brake MRW, Renson L, Kuether RJ, Tiso P, editors, Nonlinear Structures and Systems : Proceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024. Springer. 2024. p. 121-124. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-031-69409-7_21
Jahn, Martin ; Tatzko, Sebastian. / Numerical Investigation of a Reluctance Force Shunt Damping System. Nonlinear Structures and Systems : Proceedings of the 42nd IMAC, A Conference and Exposition on Structural Dynamics 2024. editor / Matthew R. W. Brake ; Ludovic Renson ; Robert J. Kuether ; Paolo Tiso. Springer, 2024. pp. 121-124 (Conference Proceedings of the Society for Experimental Mechanics Series).
Download
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