Intelligent negative stiffness method and device avoiding bearing static loads

Abstract

The invention provides an intelligent negative stiffness method and device avoiding bearing static loads. According to the method and device, on the basis of a passive negative stiffness component with a transmission shaft, a starting component and a halting component used for controlling the passive negative stiffness component to be started and halted, a motor used for changing the position of the passive negative stiffness component or the length of the transmission shaft, a sensor used for measuring static loads borne by an external static load bearing structure or an above-spring component and a controller used for receiving signals of the sensor and controlling the starting component, the halting component and the motor to be started or halted, the passive negative stiffness technology and the static load isolation technology are adopted, the passive negative stiffness component is directly or indirectly connected to the external static load bearing structure or the above-spring component, the ground or a below-spring component, so that the position of the passive negative stiffness component or the length of the transmission shaft is changed, the purpose of offsetting the static loads exerted on the passive negative stiffness component by the external static load bearing structure or the above-spring component is realized, and the passive negative stiffness component avoids bearing the static loads.

Description

Technical field [0001] The invention relates to the field of vibration control, in particular to an intelligent negative stiffness method and device that does not carry static load. Background technique [0002] Dynamic loads can cause many hazards, ranging from vehicle comfort to structural damage and collapse caused by earthquakes. For how to protect the main structure against strong vibrations caused by dynamic loads, various vibration control technologies have emerged. Vibration control technology can be roughly divided into three categories: passive mode, semi-active mode and active mode. Based on these three types of vibration control technologies, people have invented various dampers to reduce the vibration of the main structure, such as viscous fluid dampers, viscoelastic dampers, metal yield dampers, friction dampers, and tuned mass dampers. , Magnetorheology (MR) dampers, variable orifice dampers, variable friction dampers and active mass drives, etc. [0003] Various ...

AI Technical Summary

Problems solved by technology

[0005] 1. The negative stiffness device in the semi-active mode needs to design control algorithms and rules specially according to its protective structure, which is generally not popular;

[0006] 2. The installation of negative stiffness in passive form will lead to the decrease of system stiffness (including static and dynamic). When the static load changes, the response caused by the change will be amplified and the stability of the system will be reduced.

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