期刊
SMART MATERIALS AND STRUCTURES
卷 23, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/23/12/125044
关键词
broadband vibration absorbing; electromagnetic; shunt damping; negative resistance; negative inductance
资金
- National Natural Science Foundation of China [11172225, 11102147, 11302160]
- Research Fund for the Doctoral Program of Higher Education of China [20110201110018]
The traditional tuned mass absorber is widely employed to control the vibration of a primary structure by transferring the vibrating energy to the absorber. However, the working band of the absorber is very narrow, which limits the application of broadband vibration control. This study presents a novel broadband electromagnetic absorber by first introducing two negative impedance shunts to improve broadband damping of the absorber. The electromagnetic absorber is modeled, and the corresponding electromagnetic coupling coefficient is tested. A cantilever beam is employed to verify the broadband vibration absorption of the negative resistance (NR) shunted electromagnetic absorber (NR absorber) and the negative inductance NR shunted electromagnetic absorber (NINR absorber). The governing equations of the beam with two absorbers are derived, and the experiments are set up. The results point out that the NR and NINR absorbers can attenuate the broadband vibration. The proposed absorbers do not need the feedback system and the real-time controller compared to the active absorber; hence, they have great application potential in aerospace and in submarine applications, as well as in civil and mechanical engineering.
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