%A Yin,Danjie %A Yi,Kaijun %A Liu,Zhiyuan %A Zhang,Anfu %A Zhu,Rui %D 2022 %J Frontiers in Physics %C %F %G English %K metamaterial,Piezoelectric material,Digital circuit,Cylindrical shell,vibration control %Q %R 10.3389/fphy.2022.958141 %W %L %M %P %7 %8 2022-August-15 %9 Original Research %# %! Multi-modal vibration reduction of meta-shells %* %< %T Design of cylindrical metashells with piezoelectric materials and digital circuits for multi-modal vibration control %U https://www.frontiersin.org/articles/10.3389/fphy.2022.958141 %V 10 %0 JOURNAL ARTICLE %@ 2296-424X %X 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.