Vibration control in piping system by dual dynamic absorbers
- Sanwa Tekki Corp., Tokyo (Japan)
- Nihon Univ., Tokyo (Japan)
This paper deals with the applicability of a seismic response reduction method with a dual dynamic absorber for equipment, piping system, etc. in a nuclear power plant. The dual dynamic absorber which utilizes a magnetic damping effect was developed and the investigation was done to the characteristics of vibration controllability through excitation tests. As the primary stage of this study, a simple vertical straight pipe with a diameter of 60.8 mm and a length of 2,000 mm was excited by random vibration input, and amplitude of vibration level was reduced by the dual dynamic absorber mounted on the pipe. The mass ratio of the dual dynamic absorber to the straight pipe was 0.05. The result of this test was that the response reduction effect of the dual dynamic absorber for random excitations was verified. Also, the damping characteristic with fine linearity for the input level was obtained.
- OSTI ID:
- 170376
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1343-6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tuned vibration absorbers for offshore structures
Laboratory piping system vibration tests to determine parametric effects on damping in the seismic frequency range