Wave absorption control of a lumped mass system using a dynamic absorber with variable stiffness property
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- NISHIMURA Hodaka
- Graduate School of Natural Science and Technology, Kanazawa University
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- KOMATSUZAKI Toshihiko
- Institute of Science and Engineering, Kanazawa University
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- MATSUMURA Yuichi
- Department of Mechanical Engineering, Gifu University
Bibliographic Information
- Other Title
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- 剛性可変性を有する動吸振器を用いた集中質量系の波動吸収制御
Abstract
<p>Severe vibration may occur in structures such as high-rise buildings and bridges according to wind and seismic excitations, and in large space structures due to their lightweight and flexible constitution. Generally, when several vibration modes are simultaneously excited, application of the model-based control strategies become difficult. In this study, we propose a wave absorption control method for reducing vibrations in multi-degree-of-freedom systems semi-actively using a magnetorheological elastomer-based dynamic absorber. The stiffness of the absorber is changeable according to the applied magnetic field strength. The value is tuned adaptively so that the mechanical impedance at the boundary meets an absorptive boundary requirement. Analytical investigation clarified relationship between the excitation frequency and absorber stiffness that could eliminate the wave reflection from the boundary and maintain no resonant state in the system. Based on this stiffness condition, numerical simulation and experiment for the wave absorption control were performed. The proposed absorber to be used with the wave control scheme was found to significantly reduce structural vibrations within the stiffness variable range.</p>
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 89 (920), 22-00257-22-00257, 2023
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390295879375928320
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- ISSN
- 21879761
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- KAKEN
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- Abstract License Flag
- Disallowed