Modeling and experimental analysis of particle damping phononic crystal plate

Abstract

A phononic crystal with particle assembly dampers was constructed. A high-speed camera was used to record and observe the vibration phenomenon of the particle assembly under external excitation. By analyzing the vibrations of the particle assembly, a continuous system equivalent to the discrete particle assembly was proposed. The particle damping equivalent model was fitted to data using an artificial neural network. Two particle damping phononic crystal plates were designed. Based on the equivalent model, a particle damping phononic crystal model was established. The results of the simulations and experiments showed that the average damping effect of the particle damping structure was greater than 75%. Particle damping phononic crystals possess excellent low vibration transmission characteristics, narrow bandgap characteristics at low frequencies, and high damping characteristics.