Active-passive hybrid seismic control method for cultural relic and free-standing platform

Abstract

The invention discloses an active-passive hybrid seismic control method for a cultural relic and a free-standing platform. The active-passive hybrid seismic control method is first applied to a seismic proof research on preservation of cultural relics. The control method combines an active seismic control technology and a passive seismic control technology, can achieve a control effect superior to one of the active seismic control effect and the passive seismic control effect, and can overcome the defect of only relaying on the active seismic control or the passive seismic control. The influence of seismic waves on the cultural relics in a sudden earthquake is reduced, and the cultural relics are not overturned, do not glide and are not impacted, so that the integrity of the cultural relics is protected. The control method is mainly used for inhibiting vibration transmission in the horizontal direction, that is, transverse waves in the seismic waves. The propagation velocity of the transverse waves is lower than that of longitudinal waves in seismic waves, but the damage effect of the transverse waves is much higher than that of the longitudinal waves. Active control of the X direction and the Y direction, which are orthogonal, in the horizontal direction is realized, the horizontal acceleration component, the velocity component and the displacement component, which are transmitted to the cultural relics by the transverse waves, are effectively controlled and inhibited through active vibration, vibration of the cultural relics is reduced, and the safety of the cultural relics is protected.

Description

technical field [0001] The invention belongs to the field of shock absorption technology, and relates to a shock absorption technology for a cultural relic floating platform in a museum, in particular to a control method for an active and passive hybrid shock absorption floating platform for cultural relics. Background technique [0002] The movable cultural relics, mainly floating cultural relics in the collection, are the precious heritage left to us by our ancestors. They have extremely important scientific, cultural and historical values, and their protection is of great significance. However, under the action of earthquakes, floating cultural relics without earthquake-proof measures are easily damaged. Just take the 8.0-magnitude Wenchuan Earthquake in my country in 2008 as an example. According to incomplete statistics, 3,169 movable cultural relics in 216 cultural relic collection units in Sichuan Province alone were damaged to varying degrees, resulting in huge loss ...

AI Technical Summary

Problems solved by technology

It can be seen that there are certain defects in passive shock absorption. First, passive shock absorption has high requirements for energy-dissipating materials, and the characteristics of materials directly affect the final control effect. Second, passive shock absorption requires a sufficiently long allowable Displacement, that is, the maximum sliding displacement to meet the needs of sliding or deformation; finally, near the fault, long-period, high-speed vibration will cause the displacement stroke of the isolated layer in the passive damping control to increase, so that the control effect will also be affected by the placement position. limit, and even the phenomenon of magnified acceleration

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