Adjustable electromagnetic damping type tuned mass-inertial mass damper

Abstract

The invention discloses an adjustable electromagnetic damping type tuned mass-inertial mass damper, and belongs to the technical field of dampers. The damper comprises a ball screw mechanism, a fixingbase, polished shafts, a coupler, a motor, mass blocks, springs and an external connecting frame, the external connecting frame is used for being connected to an external structure and serves as a supporting base for a damper body, the upper end of a lead screw of the ball screw mechanism penetrates through the fixing base, the lower end of the lead screw is connected to the motor through the coupler, a ball nut is arranged on the inner side of the fixing base and is connected to the lead screw, the mass blocks and the springs are arranged on the outer side of the lead screw and penetrate through the polished shafts, the external connecting frame is connected to an external vibration structure, and the mass blocks are driven by external vibration to do linear motion along the polished shafts so as to enable linear motion of the ball nut in a center empty groove to be converted into rotating motion of the lead screw. According to the damper, energy generated by vibration of the external vibration structure can be converted into motion kinetic energy of the mass blocks and electric energy of the motor to be greatly consumed, and therefore the vibration reduction / shock absorption effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of dampers, and more specifically relates to a tuned mass-inertia damper with adjustable electromagnetic damping. Background technique [0002] In recent years, the excellent shock absorption performance of tuned mass damper (TMD) and tuned liquid damper (TLD) has attracted extensive attention from the engineering community. The research on TMD has developed vibration reduction systems such as MTMD and ETMD. The working principle of TMD is to place a large mass in the additional structure, and add a certain amount of stiffness and damping. By adjusting the natural frequency of the auxiliary structure to be similar to the frequency of the main structure, the function of the vibration absorber is achieved, so that the vibration response of the main structure get under control. [0003] In order to achieve the ideal control effect, when using a tuned mass damper (TMD) for structural vibration control, a large...

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Problems solved by technology

[0003] In order to achieve the ideal control effect, when using a tuned mass damper (TMD) for structural vibration control, a large installation and movement space is usually required; but this often occupies the use space of the structure and has a certain impact on the use function of the structure

In addition, the mass of the controlled structure in actual engineering is usually huge, and correspondingly, the mass of the tuned mass damper used is also very large, which will increase the dynamic response of the structure

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