Electromagnetic multistage adjustable variable inertial capacitance and variable damping device

Abstract

The invention discloses an electromagnetic multistage adjustable variable inertial capacitance and variable damping device. An iron core is magnetized by arranging an electromagnetic coil winding outside the iron core and applying a current action to the electromagnetic coil winding; an air gap magnetic field is generated in an air gap by using the magnetized iron core and a permanent magnet so asto cause the change of shear damping force among a driving shear plate, a driven shear plate and a magnet yoke, and the problem that mechanical properties of an inerter cannot be fully utilized because of friction generated by mutual contact among the parts is avoided; and therefore, multistage real-time adjustability of an inertial capacitance coefficient and a damping coefficient of the devicecan be realized.

Description

technical field [0001] The invention relates to the technical field of damping devices, in particular to an electromagnetic multi-stage adjustable inertia capacity variable damping device. Background technique [0002] Incentives such as earthquakes or typhoons will cause damage to buildings, bridges and other structures, resulting in casualties and direct or indirect serious economic losses. Recoverable and sustainable design is the current development goal of civil engineering structure design. Active and Passive structure control technology plays a vital role in the response of structures under dynamic excitations such as earthquakes or typhoons. TMD is widely used in long-span bridges and high-rise buildings around the world, limited by mass ratio factors and TMD structures. Due to the uncertainty of dynamic characteristics and external excitation, the robustness of the TMD control system is reduced, and the MTMD structure can improve its robustness, but the configuratio...

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Problems solved by technology

[0002] Incentives such as earthquakes or typhoons will cause damage to buildings, bridges and other structures, resulting in casualties and direct or indirect serious economic losses. Recoverable and sustainable design is the current development goal of civil engineering structure design. Active and Passive structure control technology plays a vital role in the response of structures under dynamic excitations such as earthquakes or typhoons. TMD is widely used in long-span bridges and high-rise buildings around the world, limited by mass ratio factors and TMD structures. Due to the uncertainty of dynamic characteristics and external excitation, the robustness of the TMD control system is reduced, and the MTMD structure can improve its robustness, but the configuration is complicated; the inertial vessel can provide an inertial coefficient equivalent to hundreds of times the physical mass (equivalent quality), greatly reducing the quality requirements of the TMD structure, the vibration energy dissipator based on the inerter is gradually recognized and has received a lot of research, which can achieve better effectiveness and robustness than the traditional TMD

[0003] In the prior art, inerters generally rely on mechanical structures such as racks and pinions, and the inerters are usually not adjustable. There are also some inerters that use hydraulic spiral pipelines and use inlet and outlet valve controls to realize adjustable inertial structures, but such design structures are more complicated. , and these structures have a certain friction, resulting in the mechanical properties of the inerter can not be fully utilized, so it is very necessary to study a new type of variable inertia variable damping device

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