Semi-active particle vibration damping device with truss structure

Abstract

The invention discloses a semi-active particle vibration damping device with a truss structure. The truss structure is connected with a structure to be damped, the vibration damping device comprises magnetic-permeable metal particles, a coil, a current control module, a vibration pickup sensor and a direct-current power module, the magnetic-permeable metal particles are filled in a hollow steel tube of the truss structure, the coil is wound on the outer wall of the hollow steel tube, the current control module is connected with the coil, the vibration pickup sensor is disposed on the structure to be damped, and the current control module receives vibration signals picked up by the vibration pickup sensor and controls the direct-current signal module to output corresponding current to the coil after the vibration signals are processed. The vibration frequency of the structure to be damped can be tracked, the optimal damping ratio of a particle damper can be quickly adjusted, and accordingly the vibration attenuation performance of the semi-active particle vibration damping device within a broader frequency band range is improved. In addition, the semi-active particle vibration damping device is simple in structure and high in adaptability, and an extra space is omitted.

Description

technical field [0001] The invention belongs to the technical field of building vibration reduction and noise reduction, in particular to a particle damper in a truss structure. Background technique [0002] Over the past 30 years of reform and opening up, with the rapid development of my country's national economy and the improvement of comprehensive national strength, the technological level of my country's spatial structure has also made great progress, and is catching up with and surpassing the international advanced level. The social demand and engineering application of spatial structure are increasing year by year, especially in recent years, with the rapid economic development and the development of a series of major national social and economic activities, my country will still build a number of large-scale offshore oil and gas production in the past ten years The ocean platform and a large number of high-standard, high-standard sports venues, exhibition halls, airpo...

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Problems solved by technology

Therefore, particle damping has the prospect of being used for vibration reduction of various structures, but the research and application of particle damping on truss vibration reduction in building structures such as offshore platforms has not received much attention at home and abroad

[0004] The current patent CN200710052142.2 "A broadband elastic particle damper for drum washing machine" and the patent CN200910007476.7 "Non-obstructive micro-particle damping sound insulation sleeve" on the vibration reduction of particle dampers all introduce a passive particle damping device. , this type of passive vibration isolation device has poor adaptability under multi-working conditions, especially it cannot effectively isolate low-frequency vibration

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