Vibration isolation metamaterial device based on equivalent mass amplification and vibration isolation method

Abstract

The invention discloses a vibration isolation metamaterial device based on equivalent mass amplification, which comprises a plurality of vibration isolation assembly structures, each vibration isolation assembly structure comprises a plurality of mass columns, a plurality of rotating shaft devices and a cross-shaped mass frame, the rotating shaft devices are welded and fixed on the tops of the mass columns, and the cross-shaped mass frames are fixed on the rotating shaft devices; the tail end of the cross-shaped mass frame is welded and fixed to the tops of the multiple rotating shaft devices. The invention provides a Rayleigh wave attenuation method based on an equivalent mass amplification mechanism. Based on the equivalent mass amplification principle, a shock insulation assembly structure is designed, a lower-frequency forbidden band is obtained, the requirement of the seismic wave field is met, and all Rayleigh waves in a band gap cannot penetrate through the barrier. According to the shock insulation assembly structure, Rayleigh waves in the band gap range are attenuated, and buildings in all areas behind a barrier can be effectively protected.

Description

technical field [0001] The present invention relates to the technical field of seismic isolation. More specifically, the present invention relates to a vibration isolating metamaterial device and a vibration isolating method that amplify the equivalent mass. Background technique [0002] The earliest seismic measures of buildings are mainly the seismic design of building structures. The working principle of this design is to use the nonlinear state of a single structure itself to store and consume seismic energy. The general method is to increase the section of the building structure and increase the reinforcement to ensure that the structure has sufficient strength, stiffness and ductility, and then enhance the seismic performance of the main structure itself to resist earthquake action. However, this method has some disadvantages, such as generally poor durability and short service life, and should be used with caution in harsh environments such as corrosiveness. Among th...

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Problems solved by technology

However, the design, installation, and transportation of seismic isolation structures using the equivalent amplification mechanism are inconvenient, and the structure is complex.

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