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

Thin-walled cylindrical shells are widely used in industries, such as the main parts of aircrafts, rockets, and submarines. Except for meeting load-bearing capacities, structures must also have good vibration acoustic performances. However, it is still a challenge to control multi-modal at low frequencies. This study explores cutting-edge local resonant piezoelectric metamaterials low-frequency shells. A novel meta-shell with materials digital circuits was proposed, multi-resonance transfer function implemented each circuit. method optimizing parameters purpose reduction developed. The vibrational characteristics numerically analyzed using finite element method. Numerical results clearly demonstrate that by delicately designing function, can reduce peak amplitudes first five modes 30 dB or more. Therefore, proposed may open new opportunities mitigation transport vehicles underwater equipment.