ATMD vibration damping device for self-powered mass-damped composite structure

Abstract

The invention discloses an ATMD damping device with a self-powered mass damping composite structure, which includes a mass block, a magneto-rheological fluid damping unit, two power generation units, and a sliding guide rail; the groove of the mass block is embedded in the center of the sliding guide rail The convex platform; the roller rim of the mass block is concave and convex, and cooperates with the flange of the sliding guide rail to make the mass block reciprocate along the guide rail while assisting in the position limit; one end of the sliding guide rail is provided with a first The other end of the baffle is provided with a second baffle; the two ends of the two generating units are horizontally fixed on the second baffle and the mass block. According to the different vibration frequencies of the high-tower equipment, the electricity generated by the piezoelectric chip is also different, which affects the strength of the magnetic field generated by the coil, and finally directly leads to the damping of the magnetorheological fluid, so as to actively adjust the vibration frequency of the TMD to the controlled In the natural frequency region of the structure, an effective vibration reduction effect is achieved.

Description

technical field [0001] The invention designs the technical field of vibration reduction control, in particular to an ATMD vibration reduction device with a self-powered mass damping composite structure. Background technique [0002] There are a large number of towering tower equipment in the petrochemical industry. Due to the structural characteristics of the high tower equipment, it has the characteristics of high flexibility and is more sensitive to wind loads. After analysis, in the process of actual wind load, the vibration in the cross-wind direction, that is, the wind-induced vibration, is often much larger than the vibration in the down-wind direction, which causes the tower body to vibrate frequently. Fatigue cracks are generated, which bring hidden dangers to the structural integrity of the tower body. How to solve the problem of shock absorption of towering tower equipment has always been a concern. [0003] Compared with traditional structural design methods, vib...

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Problems solved by technology

After analysis, in the actual wind load process, the vibration in the cross-wind direction, that is, the wind-induced vibration, is often much larger than the vibration in the down-wind direction, resulting in frequent tower vibrations. Fatigue cracks are generated, which brings hidden dangers to the structural integrity of the tower body. How to solve the problem of shock absorption of high-rise tower equipment has always attracted attention

At present, some new damping materials mainly include piezoelectric smart materials, shape memory alloys, magnetorheological fluids, electrorheological fluids, etc. Among them, piezoelectric ceramics are characterized by their large output, fast response, no electromagnetic interference, low energy consumption, Good electromechanical coupling characteristics, easy control and other advantages have been widely researched and applied in the field of vibration isolation and vibration reduction in aerospace, automotive engines, micro-motion platforms, etc., but the electric energy generated by piezoelectric ceramics when vibrating Effective utilization will cause the loss and waste of energy; magnetorheological fluid has also obtained certain recognition in the field of vibration isolation and vibration reduction due to its good yield stress, wide operating temperature range, strong plastic viscosity and excellent stability. application; however, magnetorheological fluid needs electric energy when it works, so that the area of ​​use of magnetorheological fluid is limited due to energy supply problems

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