Abstract
The purpose of this study is to develop a three-dimensional passive dynamic damper using springs with high damping material to suppress multiple vibration modes of piping systems. In this paper, firstly, studies of theory for design of a three-dimensional passive dynamic damper are performed. As a result, multiple TMD theory is confirmed that is appropriate for the design of three-dimensional passive dynamic damper. Next, vibration tests using a small dynamic damper model using springs with high damping material and pipe models are performed in order to investigate effects of vibration reductions of the dynamic damper model. As a result, the damping characteristics of the pipe model are confirmed to be improved by using the dynamic damper model. Further, reductions of resonant response of the piping model under sinusoidal excitations are confirmed.
