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- Title
1619. Design, simulation and experiment of particle dampers attached to a precision instrument in spacecraft.
- Authors
Xiaoyin Wang; Xiandong Liu; Yingchun Shan; Tian He
- Abstract
Aiming at attenuating the vibration of a precision instrument in spacecraft, multiple particle dampers are designed and their damping performances are evaluated. Firstly, the vibrating table test for the primary system under sin-swept excitation is conducted to acquire the vibration characteristic. Then enclosures attached to the installing bracket are designed and fabricated elaborately. Using discrete element-finite element (DE-FE) coupling algorithm, the effects of some system parameters (such as: mass ratio, particle material, numbers of dampers and cavity depth) are investigated to optimize the damping capacity of particle dampers. Furthermore, a series of experiments are conducted to verify the performance of particle dampers under dynamic load. The results indicate that the transfer functions of acceleration in Y and Z direction decrease at 22.58 % and 77.38 % respectively, while only 3.1 % mass of the primary system is attached.
- Subjects
DAMPERS (Mechanical devices); SPACE vehicles; FINITE element method; PARAMETER estimation; DISCRETE element method
- Publication
Journal of Vibroengineering, 2015, Vol 17, Issue 4, p1605
- ISSN
1392-8716
- Publication type
Article