METHOD FOR RESTRAINING RESPONSE OF A STRUCTURE TO OUTSIDE DISTURBANCES AND APPARATUS THEREFOR

摘要

AbstractThe present invention concerns apparatus for restrainingvibration of a structure having at least one natural mode ofvibration. The apparatus comprises an enclosure, a main weight,a resilient member, a viscous liquid, and an adjustment device.The enclosure defines an inner space therein and the main weight,has a mass and is enclosed in the enclosure. The resilientmember connects the weight to the enclosure and exerts on theweight, a restoring force proportional to the relativedisplacement of the weight with respect to the enclosure. Theviscous liquid is retained in the inner space and has a viscositywhich provides to the weight, a damping force which isproportional to a relative velocity of the weight with respectto the enclosure. The resilience of the resilient member and themass of the main weight provide the apparatus with at least onenatural frequency of vibration The adjustment device providesthe capability of adjusting resilience of the resilient memberand/or the mass of the weight, in order to adjust the naturalfrequency of the apparatus. In order to restrain the vibrationof the structure, the apparatus has at least one naturalfrequency of vibration which corresponds to at least one naturalmode of vibration in the structure.