A viscoelasticity-tmd composite multi-dimensional damping device and damping method thereof

Abstract

The invention discloses a viscoelastic-TMD composite multi-dimensional damping device and a damping method thereof. The device comprises counter-force steel sheets, a self-tapping screw which is arranged among the counter-force steel sheets, a first viscoelastic damping supporting system, a second viscoelastic damping supporting system, a mass block and a bottom bearing steel sheet, wherein the self-tapping screw is used for supporting the counter-force steel sheets and adjusting the positions of the counter-force steel sheets as requirement; the first viscoelastic damping supporting system isused for controlling the vibration of the structure in the horizontal direction; the maximum displacement of the mass block in the horizontal direction can be limited through a first bolt and a pre-compressing spring; the second viscoelastic damping supporting system is used for controlling the vibration of the structure in the vertical direction; and the maximum displacement of the mass block inthe vertical direction can be limited through a second bolt and a pre-compressing spring. The device is provided with an adjustable stiffness system and a damping system, so that the vibration response of the structure in a plurality of directions can be effectively stably and continuously controlled.

Description

technical field [0001] The invention relates to a viscoelasticity-TMD composite multi-dimensional damping device and a damping method thereof. Background technique [0002] Due to the advantages of simple structure, low cost and easy maintenance, TMD has gradually become one of the most effective passive control methods for structures, especially in the fields of wind vibration and earthquake control of high-rise building structures and long-span bridges. Most of the existing TMD devices only have a single-directional shock absorption function, and the vibration of the actual structure is usually generated by the coupling of vibration sources in multiple directions, which makes the actual shock absorption effect of the TMD device not ideal; in addition, the TMD adjusts the device itself simultaneously. Dynamic parameters such as the mass ratio, damping ratio, and frequency ratio of the structure, and the device that uses the resonance principle to control the structure requi...

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Problems solved by technology

Most of the existing TMD devices only have a single-directional shock absorption function, and the vibration of the actual structure is usually generated by the coupling of vibration sources in multiple directions, which makes the actual shock absorption effect of the TMD device not ideal; in addition, the TMD adjusts the device itself simultaneously. The mass ratio, damping ratio, frequency ratio and other dynamic parameters of the structure, and the device that uses the resonance principle to control the control structure require the installed TMD device to have a large adjustable range of stiffness and damping, and most common TMD devices are low. The damping system has poor overall energy dissipation capacity and cannot effectively dissipate the input seismic energy. At the same time, the internal stiffness contribution source of the device is single, and the stiffness and damping are poorly adjustable. It is difficult to meet the control requirements of controlled structures with different dynamic characteristics. Reduced the vibration control ability of the TMD unit to a certain extent

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