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A hybrid MRE isolation system integrated with ball-screw inerter for vibration control

Journal Article


Abstract


  • Magnetorheological elastomer (MRE), as a field-dependent smart material, has been widely applied on base isolation for vibration reduction. However, the MRE isolation system often experiences large drift during a strong earthquake, which may cause mechanical failure. Additionally, its performance among the low-frequency range is still limited. To tackle these problems, this paper proposes a hybrid vibration isolation system which is composed of four stiffness softening MRE isolators and a passive ball-screw inerter. A simulation was developed to prove the effectiveness of the hybrid isolation system before the earthquake tests. A scaled three-storey building was developed based on the scaling laws as the isolated objective in earthquake experiments. Besides, a linear quadratic regulation controller was utilised to control the mechanical properties of the hybrid MRE isolation system. Finally, the evaluation experiments of the building under a scaled Kobe earthquake excitation were conducted. The experimental results show that the simulation and the experimental results were in agreement, validating that the hybrid isolation system could provide a better vibration mitigation performance, in the meanwhile, reduce the displacement amplitude of the isolation system.

Publication Date


  • 2022

Citation


  • Jin, S., Sun, S., Yang, J., Deng, L., Du, H., & Li, W. (2022). A hybrid MRE isolation system integrated with ball-screw inerter for vibration control. Smart Materials and Structures, 31(2). doi:10.1088/1361-665X/ac3eed

Scopus Eid


  • 2-s2.0-85122476650

Volume


  • 31

Issue


  • 2

Abstract


  • Magnetorheological elastomer (MRE), as a field-dependent smart material, has been widely applied on base isolation for vibration reduction. However, the MRE isolation system often experiences large drift during a strong earthquake, which may cause mechanical failure. Additionally, its performance among the low-frequency range is still limited. To tackle these problems, this paper proposes a hybrid vibration isolation system which is composed of four stiffness softening MRE isolators and a passive ball-screw inerter. A simulation was developed to prove the effectiveness of the hybrid isolation system before the earthquake tests. A scaled three-storey building was developed based on the scaling laws as the isolated objective in earthquake experiments. Besides, a linear quadratic regulation controller was utilised to control the mechanical properties of the hybrid MRE isolation system. Finally, the evaluation experiments of the building under a scaled Kobe earthquake excitation were conducted. The experimental results show that the simulation and the experimental results were in agreement, validating that the hybrid isolation system could provide a better vibration mitigation performance, in the meanwhile, reduce the displacement amplitude of the isolation system.

Publication Date


  • 2022

Citation


  • Jin, S., Sun, S., Yang, J., Deng, L., Du, H., & Li, W. (2022). A hybrid MRE isolation system integrated with ball-screw inerter for vibration control. Smart Materials and Structures, 31(2). doi:10.1088/1361-665X/ac3eed

Scopus Eid


  • 2-s2.0-85122476650

Volume


  • 31

Issue


  • 2