Magneto-rheological damper for suspended mass pendulum

Abstract

The invention discloses a magneto-rheological damper for a suspended mass pendulum, and belongs to the field of vibration control of civil engineering. The magneto-rheological damper for the suspended mass pendulum is a suspended-mass-pendulum damper capable of being controlled in a semi-active mode. The magneto-rheological damper comprises a magneto-rheological pendulum shaft system, a rigid suspender, a balancing weight and the like. A closed magneto-rheological device is designed in a rotary bearing of the suspender to close a rotary shaft in a magneto-rheological fluid environment; blades are arranged on the bearing and control the state of magneto-rheological fluid through a control power source so as to achieve the objective of adjustable blade resistance. The magneto-rheological damper is applicable to flexible structures and high-rise structures of civil engineering structures, and breaks through the limitation of uncontrollable pendulum angles and speeds of pendulum shafts of conventional mass pendulum systems. The civil engineering structures are large in size, tuned mass pendulum dampers applied to the civil engineering structures are large in mass, and thus high power is needed for realization of semi-active control of mass pendulum devices. A magneto-rheological system is low in power consumption and high in force output, so that semi-drive control on the tuned mass pendulum dampers can be realized only by a small amount of currents.

Description

Technical field: [0001] The invention belongs to the field of vibration control of civil engineering, specifically, it is a semi-active control damper for controlling the swing angular velocity and swing angle by changing the state of the magneto-rheological system of the pendulum shaft, so as to adjust the control force. Background technique: [0002] The anti-seismic and wind-resistant design of traditional civil engineering structures is to dissipate earthquake energy by improving the ability of the structure itself. However, for relatively serious natural disasters, such as strong earthquakes and typhoons, this method is neither economical, nor can it meet the safety requirements, and cannot achieve the expected effect. Structural vibration control is an effective method for structural wind and earthquake resistance. In the past 30 years, it has achieved fruitful results in theoretical research and engineering applications. Suspension mass pendulum system is an effectiv...

AI Technical Summary

Problems solved by technology

For the traditional mass pendulum system, there are the following problems: (1) The swing angle of the general suspended mass pendulum is within a certain range to achieve the control effect

However, if the earthquake or wind vibration is large, the swing angle of the suspender (hanging wire) will be large, which will affect the vibration reduction effect of the structure, or even have the opposite effect.

(2) The traditional mass pendulum cannot adjust the control force in real time according to the specific external excitation and structural characteristics to achieve the optimal control effect

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