著者

高田 孝 山口 彰 藤田 聡 皆川 佳祐 栗坂 健一

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会 年会・大会予稿集

巻号頁・発行日

vol.2011, pp.367, 2011

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本研究では、免震システムを備えたナトリウム冷却高速炉における機器の損傷確率について、免震システムの非線形特性を考慮した評価手法の開発を行っている。本報では、免震システムにおける損傷確率における代表値(フラジリティにおける横軸)および機器応答の不確実さの影響について検討した結果を報告する。

著者

皆川 佳祐 藤田 聡 遠藤 六郎 雨宮 満彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.75, no.752, pp.837-844, 2009

参考文献数

8

被引用文献数

1 2

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In this study, vibration characteristics of mechanical structure having high natural frequency are investigated from the viewpoint of energy balance. Mechanical structures having high natural frequency in a nuclear power plant are generally designed statically and elastically. However it has been reported that fracture of ordinry piping is produced not by momentary large load but by cumulative fatigue damage. Therefore it is very imortant to grasp seismic performance dynamically by considering cyclic load. This paper deals with an investigation regarding seismic performance evaluation of high natural frequency mechanical structure. The energy balance equation that is one of valid methods for structural calculation is applied through the investigation. The main feature of the energy balance equation is that it explains accumulated information of motion. Therefore the energy balance equation is adequate for the investigation of the influence of cumulative load such as seismic response. In this paper, vibration experiment and simulation using sinusoidal waves and artificial seismic waves were examined in order to investigate relationship between natural frequency of structure and energy. As a result, we found that input energy decreases with an increase in the natural frequency.