Abstract
The purpose of this study is to develop methods to improve damping characteristics using a high damping material for reducing earthquake responses of equipments and piping system of nuclear plant. In this paper, a structure attaching the Mn-Cu alloy as a high damping material to improve the damping characteristics of the piping structure is proposed. Damping characteristics of the piping structure are evaluated by frequency response analyses using the finite element method. Further, vibration tests using steel rod attached with Mn-Cu alloy are performed. From these analytical and experimental results, the validity of the damping characteristic evaluation method and the method for improvement of damping characteristics of the steel rod using Mn-Cu alloy are confirmed.
