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http://dx.doi.org/10.20466/KPVP.2018.14.2.041

A Study on Seismic Performance Improvement of Nuclear Piping System through Dynamic Absorber  

Kwag, Shinyoung (한국원자력연구원)
Kwak, Jinsung (한국원자력연구원)
Lee, Hwanho (한국원자력연구원)
Oh, Jinho (한국원자력연구원)
Koo, Gyeong Hoi (한국원자력연구원)
Publication Information
Transactions of the Korean Society of Pressure Vessels and Piping / v.14, no.2, 2018 , pp. 41-48 More about this Journal
Abstract
In this study, the dynamic absorber and the damper are applied to improve the seismic performance of the piping system, and their quantitative effects on the piping system performance are examined. For this purpose, the response performances of piping system applied with the dynamic absorber/damper are compared with those of the original piping system. Firstly, the frequency response analyses of the piping system with the presence or the absence of dynamic absorber/damper are performed and these results are compared. It has been shown that the maximum acceleration response per the frequency of the piping system is considerably reduced by installing the dynamic absorber and the damper. Secondly, the seismic responses of the piping systems with and without dynamic absorber/damper are compared. As a result of the numerical analyses, it is confirmed that key responses are reduced by 17%-63% due to the installation of the dynamic absorber and damper. Finally, as a result of the seismic performance evaluation, it is confirmed that the HCLPF (High Confidence of Low Probability of Failure) seismic performances are increased by 1.22 to 2.70 times with respect to the failure modes with an aid of the dynamic absorber and damper.
Keywords
Damper; Dynamic Absorber; Structural Performance; Piping System;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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