Experimental study on the damping mechanism of buffered impact dampers
Lu Zheng1,2 Wang Yan1 Du Jiang3
1. College of Civil Engineering, Tongji University, Shanghai 200092, China；
2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
3. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China
Abstract：In order to systematically explore the damping mechanism of buffered impact dampers, a shaking table test is conducted, in which the material properties are analyzed. Seven buffered materials are chosen in this paper, and experiments on both buffered container and buffered particle are carried out. A new concept “collision hardness” is proposed to represent the critical factor of momentum exchange. Results show that damper with small collision hardness performs better, because it leads to larger momentum exchange. There is no describing rule between the coefficient of restitution and the damping performance, because it reflects the coupled influences of momentum exchange and energy dissipation. There is a negative correlation between these two indexes. In practical engineering, the damper with a hard particle and soft inner wall of the container is recommended.
鲁正 汪晏 杜江. 缓冲型冲击阻尼器减震机理的试验研究[J]. 土木工程学报, 2020, 53(S2): 117-122.
Lu Zheng Wang Yan Du Jiang. Experimental study on the damping mechanism of buffered impact dampers. 土木工程学报, 2020, 53(S2): 117-122.
