Ultra-long-period tuned mass damper (TMD) control system

Abstract

The invention relates to the technical field of structural vibration control, and discloses an ultra-long-period tuned mass damper (TMD) control system. The ultra-long-period TMD control system comprises a fixing frame, a gear set, an inverted pendulum, a simple pendulum and a mass block. The fixing frame is located above a controlled structure and parallel to the controlled structure. The gear set comprises a gear I, a gear II, a gear III, and a gear IV. The gear I is engaged with the gear II. The gear III is engaged with the gear IV. The four gears and the fixing frame are connected throughrotation pairs. One end of the inverted pendulum is in rigid connection with gear shafts of the gear I and the gear IV. The other end of the inverted pendulum is connected with the controlled structure through a rotation pair. One end of the simple pendulum is in rigid connection with gear shafts of the gear II and the gear III. The other end of the simple pendulum is connected with the mass blockthrough a rotation pair. According to the ultra-long-period TMD control system, the free vibration period or the motion period equivalent to a large-pendulum-length simple pendulum system can be achieved by using a smallest space, the demand of an additional vibration control system for occupying of the structure building space is effectively relieved, and the limited use space of a building is effectively saved and fully utilized.

Description

technical field [0001] The invention relates to the technical field of structural vibration control, in particular to an ultra-long period TMD control system. Background technique [0002] With the development of economy and society, the country invests more and more in civil engineering and infrastructure construction every year, and some landmark major projects such as high-rise buildings, long-span bridges, large stadiums, nuclear power plants, and offshore oil drilling platforms are mushrooming. A large number of civil engineering structures represented by them are inevitably subjected to various loads during construction and use, including static loads and dynamic loads. Dynamic loads such as earthquakes, wind etc. For marine engineering structures, they are also subject to the joint excitation of ocean wind, wave and current, as well as the action of sea ice in winter. The action of these dynamic loads on the structure will cause the vibration of the structure, threat...

AI Technical Summary

Problems solved by technology

[0007] Existing TMD control systems are usually mass-spring systems or similar pendulum vibration systems composed of suspended mass blocks. They are basically the same in principle, and the difference lies in the specific implementation methods. However, without exception, if these systems To realize long-period free motion or vibration, or require a large mass block stroke (for example, for a bridge tower structure with a natural vibration period of 5 seconds, the stroke of the mass block needs to be more than ± 5 meters, plus the plane of the mass block Width size, the normal operation of the whole system requires at least a plane area equivalent to 3 to 4 room bays on the plane), or requires a larger structure installation space (similarly for the above-mentioned structure with a natural vibration period of 5 seconds, about the pendulum of a single pendulum The length is more than 6 meters, and the height of the mass block is at least equivalent to the height of 2 to 3 floors), for structures with longer periods, theoretically, the demand for space will increase with the square of the natural vibration period of the structure

Based on the above analysis, the traditional TMD control system has high requirements for building space, and it is also a huge waste of building space

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