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Optimal design of particle dampers for structures with low first eigenfrequency under forced vibration
Citation Link: https://doi.org/10.15480/882.4187
Publikationstyp
Conference Paper
Date Issued
2021-10
Sprache
English
Author(s)
Meyer, Niklas
Institut
TORE-DOI
Citation
7th International Conference on Particle-Based Methods (Particles 2021)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
SCIPEDIA
Recently, the rolling attribute of spheres has been used to develop efficient particle dampers for horizontal low amplitude vibrations. As long as the particle container’s acceleration stays below the gravitational acceleration, this rolling effect of spheres can be used. Hereby, the estimation of the damper’s energy dissipation is accurately possible using analytical formulas.
In this paper, the workflow for a systematic damper design for an underlying structure of low first eigenfrequency under forced vibration is presented. The analytical formulas describing the dampers energy dissipation are coupled to a modal reduced model of the utilized vibrating structure. Then an analytical expression for an optimal damper design is derived. Also, the calculation scheme to obtain the frequency response function of the system is presented. As application example, a simple beam-like structure is used, whereby its base point is subjected to a harmonic motion of variable frequency using a linear drive. The particle damper is mounted at the tip of the beam and its velocity is measured using a laser scanning vibrometer. Thus, the frequency response function is obtained experimentally. A good agreement between analytical and experimental obtained frequency response function is achieved for the optimized particle damper, validating the presented approach.
In this paper, the workflow for a systematic damper design for an underlying structure of low first eigenfrequency under forced vibration is presented. The analytical formulas describing the dampers energy dissipation are coupled to a modal reduced model of the utilized vibrating structure. Then an analytical expression for an optimal damper design is derived. Also, the calculation scheme to obtain the frequency response function of the system is presented. As application example, a simple beam-like structure is used, whereby its base point is subjected to a harmonic motion of variable frequency using a linear drive. The particle damper is mounted at the tip of the beam and its velocity is measured using a laser scanning vibrometer. Thus, the frequency response function is obtained experimentally. A good agreement between analytical and experimental obtained frequency response function is achieved for the optimized particle damper, validating the presented approach.
Subjects
Particle damping
Energy dissipation
Frequency response function
Rolling bed
DDC Class
004: Informatik
530: Physik
600: Technik
620: Ingenieurwissenschaften
Funding Organisations
More Funding Information
The authors would like to thank the German Research Foundation (DFG) for the financial support of the project SE1685–8/1.
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