Liquid-mass double-tuned shock absorber and assembly method thereof

Abstract

The invention discloses a liquid-mass double-tuned shock absorber, which includes a base, a top cover and a rubber-metal composite part, and also includes a ball screw inerter assembly; the inerter assembly includes a lead screw bolt, and one end of the lead screw bolt passes through the top cover The center hole protrudes upwards, and the other end is set in the step hole of the base. The ball screw part of the screw bolt is installed with a screw nut through the ball. The outer part of the screw nut is equipped with a rotating flywheel and a rolling bearing. The inner ring of the rolling bearing passes through the screw The shoulder of the nut is positioned with the shoulder of the rotating flywheel, and the outer ring of the rolling bearing is installed in the stepped hole of the base. In the present invention, the ball screw inerter assembly is designed inside the rubber-metal composite part and forms a parallel support with it. The structure is compact. The ball screw inerter assembly has excellent vibration damping performance for low-frequency vibration, which makes up for the low-frequency vibration reduction of the rubber shock absorber. The disadvantage of poor vibration performance.

Description

technical field [0001] The invention relates to a liquid-mass double-tuned shock absorber and an assembly method thereof, in particular a liquid-mass double-tuned shock absorber with a ball screw type inerter assembly and an assembly method thereof, belonging to the technical field of vibration reduction. Background technique [0002] With the continuous construction of modern cities, buildings tend to be high-rise and super-high-rise development. In order to meet the needs of production and life, the span of bridges is also increasing, and civil engineering structures are increasingly developing towards high, large, light and soft. It is the extensive construction of suspension bridges, and the span records of bridges are constantly refreshed. Although these developments provide convenience for people's production and life, the structural vibration frequency of high-rise buildings and long-span bridges is low, and the damping is small. The structural response under external...

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Problems solved by technology

However, this tuned mass damper only uses the vibration inertial force of its own mass block to offset the exciting force. If it needs to offset a large exciting force, it needs its own mass block to have a large mass, which will not only increase the The manufacturing cost of the shock absorber will also add many difficulties to the installation and disassembly work on site; in addition, the shock absorber has a narrow vibration suppression frequency band and is highly sensitive to frequency tuning; at the same time, the shock absorber can only reduce The response of the structure in one direction, but in fact, structures such as long-span bridges may generate large vibrations both vertically and laterally at the same time. Therefore, it is not economical and cannot completely solve practical problems, so the engineering application value is limited to a certain extent.

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