期刊
FRONTIERS IN PHYSICS
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.958141
关键词
metamaterial; piezoelectric material; digital circuit; cylindrical shell; vibration control
资金
- National Natural Science Foundation of China
- National Key Research and Development Program of China
- Innovation Foundation of Maritime Defense Technologies Innovation Center
- [11991030]
- [11991031]
- [11872112]
- [2021YFE0110900]
- [JJ-2020-719-05]
This study proposes a novel cylindrical meta-shell with piezoelectric materials and digital circuits to control the low-frequency vibration of cylindrical shells. By optimizing the parameters in the transfer function, the meta-shell can significantly reduce the peak amplitudes of the first five modes, offering new opportunities for vibration mitigation of transport vehicles and underwater equipment.
Thin-walled cylindrical shells are widely used in industries, such as the main parts of aircrafts, rockets, and submarines. Except for meeting the load-bearing capacities, such structures must also have good vibration and acoustic performances. However, it is still a challenge to control the multi-modal vibration of cylindrical shells at low frequencies. This study explores the cutting-edge local resonant piezoelectric metamaterials to control the low-frequency vibration of cylindrical shells. A novel cylindrical meta-shell with piezoelectric materials and digital circuits was proposed, and a multi-resonance transfer function is implemented in each digital circuit. A method to optimizing the parameters in the transfer function for the purpose of vibration reduction is developed. The vibrational characteristics of the meta-shell are numerically analyzed using the finite element method. Numerical results clearly demonstrate that by delicately designing the parameters in the transfer function, the meta-shell can reduce the peak amplitudes of the first five modes by 30 dB or more. Therefore, the proposed piezoelectric cylindrical meta-shell may open new opportunities in vibration mitigation of transport vehicles and underwater equipment.
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