Abstract:
A scaled model shaking table test on the transmission tower-line system is conducted to compare the vibration control effects of tuned mass dampers and of particle dampers on the transmission tower from both time and frequency domain. A discrete element-finite element coupled numerical model is established in ABAQUS to simulate the transmission tower-line system controlled by particle dampers. The results of experiments and simulations are compared. The energy dissipation of the tower-line system and the collision of particles inside the particle damper are discussed. The study results show that: under a seismic excitation, the vibration control effect of particle dampers is more robust than that of tuned mass dampers. The numerical model of transmission tower-line system with particle dampers established can well reflect the dynamic characteristics and seismic responses of the specimen. Owing to the particle damper, the total energy of the tower-line system is reduced by 24.12%. In order for particle dampers to achieve better control effects, there is an optimal ratio between the number of collisions among the particles and the number of collisions between the particles and the container.