3results about How to "Achieve Vibration Control" patented technology

The invention discloses a micro-vibration control construction process for a grating vibration isolation foundation, and relates to the technical field of building construction. Comprising the following steps: S1, measuring and positioning: measuring and releasing sideline control piles of each shock insulation pier and a sand-gravel cushion layer; s2, construction of a graded gravel cushion layer; s3, compaction coefficient detection; s4, paying-off is conducted on the bottoms of the shock insulation piers, wherein the sideline control point of each shock insulation pier is measured and paid off; s5, side formwork installation and steel bar binding, wherein the distance between the vibration isolation pier and the equipment walkway foundation is 10 cm, a foam polyethylene plate with the thickness of 10 cm is adopted as the side formwork, and the side formwork and the steel bars are installed, bound and formed together; s6, mass concrete pouring and temperature control, wherein layered pushing type continuous pouring is adopted, and the thickness of each layer does not exceed 50 cm; s7, concrete curing; and S8, buffer seam treatment. The compaction graded gravel cushion layer is arranged as a vibration isolation filtering layer, and the large-scale independent vibration isolation pier body is combined, so that double isolation of earthquake dynamic response and environmental vibration is effectively realized, and stable operation of a precise instrument is ensured.

The utility model belongs to pipeline damping and noise reduction equipment technical field discloses damping and noise reduction device and pipeline system. The damping and noise reduction device includes damping structure and mass structure, a plurality of damping structures are parallel and interval setting, are provided with a mass structure between any two damping structures, are provided with microperforated array structure on each mass structure, are provided with first containing hole on each damping structure, and multiple first containing holes are used for containing connected pipeline. This damping and noise reduction device can combine local area resonance band gap damping mechanism and microperforated plate sound absorption mechanism, and through integrated design, the mass structure is combined with microperforated structure, realizes low frequency control vibration and wide spectrum noise control. The damping and noise reduction device can adaptively increase or decrease the number of mass structure and damping structure to form a spring-mass multi-degree-of-freedom resonance system, realize vibration control of multiple resonance frequencies without significantly increasing the structure weight, and ensure the damping and noise reduction effect.

The invention provides a bidirectional vibration reduction tuned mass damper for a tower and a vibration control method. The damper comprises a damper mounting frame, a moving mass block, a magnetic suspension damping assembly, an eddy current damping assembly, two groups of elastic recovery assemblies and two groups of horizontal guide assemblies which are arranged in a crossed and layered manner; the damper mounting frame is mounted at the top end of the tower; the moving mass block can be mounted in the damper mounting frame in a multidirectional horizontal moving manner through a horizontal guide assembly, and is mounted in a suspension manner through a magnetic suspension damping assembly arranged in the horizontal guide assembly; the eddy current damping assembly is integrally mounted in the magnetic suspension damping assembly; and the two groups of elastic recovery assemblies are respectively connected between the moving direction of the moving mass block and the damper mounting frame. According to the control method, a tower-damper coupling model is established, and current output to a driver of the damper is controlled and adjusted according to intensity parameters measured in real time. The device has the advantages of being good in damping and restraining effect, compact in structure and the like.