A combined magnetorheological elastomer intelligent shock-isolation bearing

Abstract

The invention discloses a combined intelligent isolation bearing of magnetorheological elastomer and belongs to the field of structural control. The combined intelligent isolation bearing mainly comprises a stress bearer component, an exciter component, a sensor and a controller; the stress bearer component is composed of a round magnetorheological elastomer-steel plate vulcanized lamination, an annular lead core and an annular magnetorheological elastomer-steel plate vulcanized lamination which are coaxial and which are arranged from inside to outside; the exciter component comprises a core, a coil, an insulation layer and a magnetized steel ring coaxially arranged from inside to outside; a magnetic loop can form in a support; the sensor is mounted on upper and lower connecting plates; the controller adjusts shear stiffness of the support according to signals. The combined intelligent isolation bearing has the advantages that the mechanical and electromagnetic features of materials are made full use, spatial utilization rate and magnetic field utilization rate are high, the magnetic field is uniform with little flux leakage, the size of the coil is greatly reduced, production, usage and maintenance costs are reduced, and the combined intelligent isolation bearing as shaped as a lead-core rubber bearing is convenient to design and construct.

Description

technical field [0001] The invention belongs to the technical field of structural semi-active control, and relates to a combined magnetorheological elastomer intelligent shock-isolation bearing whose stiffness and damping can be adjusted through a magnetic field, using magnetorheological elastomer as a key material. Background technique [0002] Rubber bearing isolation technology is a mature structure passive control technology, and its vibration reduction effect is obvious. In several major earthquakes in recent years, a large number of structures using rubber isolation bearing technology have withstood the test. This passive control technology is simple to implement and highly reliable, but its drawback is that the structure cannot adjust its own stiffness and damping according to different types of seismic wave input during an earthquake. Under the action of long-period earthquakes, the structure may cause resonance, resulting in a catastrophic consequence of the displac...

AI Technical Summary

Problems solved by technology

The huge coil not only doubles the production, use and maintenance costs of the support, but also brings serious inconvenience to the design of the support layout and construction

In addition, when the huge coil is placed outside, it is necessary to leave a space for the deformation of the support, which must increase the gap between the support and the coil, which intensifies the phenomenon of magnetic flux leakage

Magnetic flux leakage will also affect the surrounding environment, especially nearby electronic equipment

In addition, in order to improve the seismic isolation performance of the structure, it is sometimes necessary to reduce the stiffness and damping of the support. However, the existing magneto-rheological elastomer bearings generally can only increase the stiffness and damping. Realizing reverse adjustment requires a long time to provide a magnetic field. Only using The coil is almost difficult to achieve reverse regulation

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