Performance evaluation and design criterion of a nonlinear energy sink
Mechanical Systems and Signal Processing, ISSN: 0888-3270, Vol: 169, Page: 108770
2022
- 45Citations
- 14Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
In the evaluation of the vibration mitigation effect of a nonlinear energy sink (NES), the selection of performance measures is important for the optimal design. This paper aims to propose new reasonable performance measures and new design criteria of the NES in harmonic excitation. To broaden the application range of the slow invariant manifold, coordinate correction is carried out for the square root model of the bistable NES. Two existing performance measures (the displacement amplitude of the main system and the energy dissipation rate of the NES) and two new performance measures (the mechanical energy and the input energy of the main system) are compared. The optimal geometric configuration and response form of the NES are found in different excitation conditions. The results show that the energy dissipation rate of the NES is not competent to evaluate the performance of the NES in harmonic excitation, while the two new performance measures show competence. By adjusting the geometry parameter, the nonlinear vibration absorber with positive linear stiffness and the bistable NES show optimal vibration mitigation effect in small and large excitation amplitudes, respectively. Unusually, the optimal response form is the periodic response rather than the strongly modulated response. In summary, the proposed performance measures and design criteria will contribute to the design of NESs.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0888327021010840; http://dx.doi.org/10.1016/j.ymssp.2021.108770; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85122323142&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0888327021010840; https://dx.doi.org/10.1016/j.ymssp.2021.108770
Elsevier BV
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