Theoretical study and experimental validation on the energy dissipation mechanism of particle dampers
An energy dissipation factor was proposed to quantify the energy dissipation mechanism of particle dampers based on theoretical analysis,and was further validated by free vibration tests and wind tunnel tests.The vibration energy of the main structure was consumed by impact and friction between particles and between particles and the container.An elastoplastic collision model and a simplified frictional-elastic collision model were used to analyze the energy dissipation due to impact and friction respectively.Then an energy dissipation factor,reflecting the vibration energy consumption of a particle damper,was defined.Finally,free vibration tests and aero-elastic wind tunnel tests of a benchmark model unattached/attached with particle dampers were conducted to validate the relationship between the vibration reduction performances and the energy dissipation factors,and the experimental results were coincide with the theoretical results.Consequently,the energy dissipation factor indicated the energy dissipation mechanism of particle dampers and can be used to select the proper material of the particles,helping to maximize the vibration control effects from the materials perspective.It was shown that the material of higher kinetic friction coefficient,higher modulus of elasticity and lower yield strength usually leads to a better energy dissipation effects.
particle damper energy dissipation factor impact plastic deformation friction
Zheng Lu Biao Huang Sami F.Masri Ying Zhou
State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai,200092,Ch Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai,20009 Sonny Astani Department of Civil and Environmental Engineering,University of Southern California,Los
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
787-795
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）