Design of cylindrical metashells with piezoelectric materials and digital circuits for multi-modal vibration control

• Published in: Frontiers in physics 2022-08, Vol.10
• Main Authors: Yin, Danjie, Yi, Kaijun, Liu, Zhiyuan, Zhang, Anfu, Zhu, Rui
• Format: Article
• Language: English
• Subjects: cylindrical shell; digital circuit; metamaterial; piezoelectric material; vibration control
• ISSN: 2296-424X; 2296-424X
• DOI: 10.3389/fphy.2022.958141

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.