Dynamic vibration absorber, vibration absorption device and method for damping of nuclear power pipeline

The invention provides a dynamic vibration absorber, a vibration absorption device and a vibration absorption method for nuclear power pipeline vibration reduction. The dynamic vibration absorber comprises an outer frame, a guide rod is arranged on the inner side face of the outer frame, and a first combined disc spring, a mass block and a second combined disc spring are sequentially installed along the guide rod; the top surface of the outer frame is provided with a radial mounting hole, one side surface of the outer frame is provided with an axial mounting hole, and the outer frame is made of all-metal materials, has the advantages of convenience in mounting, high reliability, operability of in-service inspection and the like, and can meet the special requirements of nuclear power application environments; a plurality of dynamic vibration absorbers in the radial direction, the axial direction and different frequencies of the pipeline can be installed on the same supporting assembly of the vibration absorpti