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Vol. 168, Issue 4, April 2014, pp. 311-317

 

Bullet

 

Damping Characterization of Friction Energy Dissipation for Particle Systems
Based on Powder Mechanics and Experimental Verification
 

1, 2 Wangqiang XIAO, 3 Wei LI

1 Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, China
2 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
3 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
1 Tel.: +086-13810667867

1 E-mail: xiao_xwq@126.com

 

Received: 24 January 2014 /Accepted: 7 April 2014 /Published: 30 April 2014

Digital Sensors and Sensor Sysstems

 

Abstract: We established a friction energy dissipation model for particle damping based on powder mechanics. We investigated the influence of geometric features of the damper on damping characteristics; and the geometric feature studied was the depth and length of the rectangular particle container. The work done by the frictional force between the particle layer and the effect of particle filling rate on the vibration damping characteristics was also explored. We analyzed the friction energy dissipation model, and the relationship between the particle filling rate and the vibration damping. The experimental results show good agreement with the friction energy dissipation model, which verifies the proposed simulation prediction. The results have shown that the particle damping technology can greatly consume the structure kinetic energy, and the vibration reduction effect of particle damping depends mainly on the interaction of the particles near the top. A proper filling rate of particle systems can result in an optimal effect on vibration reduction, which will provide the engineering applications with the theoretical guidance and design criteria.

 

Keywords: Particle systems, Powder mechanics, Friction energy dissipation, Experimental verification, Damping characterization.

 

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