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Beam-type metastructure with X-shape inertial amplification mechanisms for vibration suppression
https://orcid.org/0000-0002-7217-5032
Abstract A new type of beam-type metastructure periodically attaching single- or multi-stage X-shape inertial amplification (XIA) mechanisms is designed to realize efficient elastic wave attenuation and wide bandgaps benefiting the vibration suppression. Band structures of the unit cell and vibration response of the finite beam are validated numerically and experimentally. Numerical results show that compared with the triangular inertial amplification beams with the same added masses, XIA mechanisms generate wider bandgaps with higher attenuation constants at the same frequency band, for the same inertia amplification (IA) angle or same installation space. Parametric studies reveal that XIA mechanisms lead to the coupling effect of transverse wave and longitudinal wave, and induce a newly emerging bandgap. Moreover, the variations of IA angle, amplification ratio and number of stages apply basically similar effects on band structures, except the IA span. Finally, in order to explore practical applications on vibration suppression of XIA mechanisms, two schemes of multiple mechanisms in a unit cell and the hybrid unit cell are investigated. The proposed designs of XIA mechanisms have the potential to improve the capability of vibration suppression of the structures in engineering practices.
Highlights X-shape inertial amplification (XIA) beams have a better ability for wave attenuation than triangular IA beams. XIA mechanisms create bandgap transition phenomenon that bandgaps change from Bragg bandgap to IA induced bandgap. The coupling effect of transverse wave and longitudinal wave bandgaps are emerged as well as new bandgaps. Enhanced approaches of vibration suppression improve the impedance mismatch and create newly emerging third bandgaps.
Beam-type metastructure with X-shape inertial amplification mechanisms for vibration suppression
https://orcid.org/0000-0002-7217-5032
Abstract A new type of beam-type metastructure periodically attaching single- or multi-stage X-shape inertial amplification (XIA) mechanisms is designed to realize efficient elastic wave attenuation and wide bandgaps benefiting the vibration suppression. Band structures of the unit cell and vibration response of the finite beam are validated numerically and experimentally. Numerical results show that compared with the triangular inertial amplification beams with the same added masses, XIA mechanisms generate wider bandgaps with higher attenuation constants at the same frequency band, for the same inertia amplification (IA) angle or same installation space. Parametric studies reveal that XIA mechanisms lead to the coupling effect of transverse wave and longitudinal wave, and induce a newly emerging bandgap. Moreover, the variations of IA angle, amplification ratio and number of stages apply basically similar effects on band structures, except the IA span. Finally, in order to explore practical applications on vibration suppression of XIA mechanisms, two schemes of multiple mechanisms in a unit cell and the hybrid unit cell are investigated. The proposed designs of XIA mechanisms have the potential to improve the capability of vibration suppression of the structures in engineering practices.
Highlights X-shape inertial amplification (XIA) beams have a better ability for wave attenuation than triangular IA beams. XIA mechanisms create bandgap transition phenomenon that bandgaps change from Bragg bandgap to IA induced bandgap. The coupling effect of transverse wave and longitudinal wave bandgaps are emerged as well as new bandgaps. Enhanced approaches of vibration suppression improve the impedance mismatch and create newly emerging third bandgaps.
Beam-type metastructure with X-shape inertial amplification mechanisms for vibration suppression
https://orcid.org/0000-0002-7217-5032
Abstract A new type of beam-type metastructure periodically attaching single- or multi-stage X-shape inertial amplification (XIA) mechanisms is designed to realize efficient elastic wave attenuation and wide bandgaps benefiting the vibration suppression. Band structures of the unit cell and vibration response of the finite beam are validated numerically and experimentally. Numerical results show that compared with the triangular inertial amplification beams with the same added masses, XIA mechanisms generate wider bandgaps with higher attenuation constants at the same frequency band, for the same inertia amplification (IA) angle or same installation space. Parametric studies reveal that XIA mechanisms lead to the coupling effect of transverse wave and longitudinal wave, and induce a newly emerging bandgap. Moreover, the variations of IA angle, amplification ratio and number of stages apply basically similar effects on band structures, except the IA span. Finally, in order to explore practical applications on vibration suppression of XIA mechanisms, two schemes of multiple mechanisms in a unit cell and the hybrid unit cell are investigated. The proposed designs of XIA mechanisms have the potential to improve the capability of vibration suppression of the structures in engineering practices.
Highlights X-shape inertial amplification (XIA) beams have a better ability for wave attenuation than triangular IA beams. XIA mechanisms create bandgap transition phenomenon that bandgaps change from Bragg bandgap to IA induced bandgap. The coupling effect of transverse wave and longitudinal wave bandgaps are emerged as well as new bandgaps. Enhanced approaches of vibration suppression improve the impedance mismatch and create newly emerging third bandgaps.
Beam-type metastructure with X-shape inertial amplification mechanisms for vibration suppression
Sun, Yonghang (author) / Zheng, Hui (author) / Lee, Heow Pueh (author)
Thin-Walled Structures ; 189
2023-05-21
Article (Journal)
Electronic Resource
English
Easy to fabricate 3D metastructure for low-frequency vibration control
| Springer Verlag | 2024
Easy to fabricate 3D metastructure for low-frequency vibration control
| Springer Verlag | 2024