一宮 正和
著者に関連した記事は4件です。
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第17回
動的荷重を受ける配管の塑性崩壊に関する基礎的研究
著者:
長谷川 翔,笹木 龍之介,一宮 正和,笠原 直人,（東京大）
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Collapse Dynamic load Frequency ratio Input energy Piping
長谷川 翔,笹木 龍之介,一宮 正和,笠原 直人,（東京大）
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Collapse Dynamic load Frequency ratio Input energy Piping
According to experimental observations, as the failure modes of piping in nuclear power plants caused by large seismic motion, ratchet collapse was observed. Ratchet collapse is the collapse which is followed by ratchet deformation. However, the mechanism of ratchet collapse under the large seismic load is not so clear. In order to clarify ratchet collapse, it is important to examine ratchet deformation and collapse at first. Ratchet deformation occurrence condition and mechanism have already been clear. In...
英字タイトル:
Fundamental study on collapse of piping under dynamic load
英字タイトル:
Fundamental study on collapse of piping under dynamic load
第6回
基調講演：「もんじゅ」の現状と保全活動の取組み
著者:
一宮 正和,Masakazu ICHIMIYA,山下 卓哉,Takuya YAMASHITA
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Fast Breeder Reactor Maintenance Monju
一宮 正和,Masakazu ICHIMIYA,山下 卓哉,Takuya YAMASHITA
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Fast Breeder Reactor Maintenance Monju
Prototype fast breeder reactor “Monju“ attained the first critical on April 5th in 1994. The sodium leak accident in a secondary main co oling system was occurred during power rise examination on December 8th in 1995, and the “Monju“ has stopped after that. Various efforts such as reconstruction of the secondary cooling system and following verifications on integrity of components and facilities are contin ued towards the early restart up of the “Monju“ at present. The current status and efforts on mainten...
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Current Status of Monju and Effort on Maintenance 柳澤 務 Tsutomu YANAGISAWA
英字タイトル:
Current Status of Monju and Effort on Maintenance 柳澤 務 Tsutomu YANAGISAWA
第16回
振動荷重を受ける梁の進行性変形発生条件に関する研究
著者:
笹木 龍之介,一宮 正和,呂 金其,笠原 直人,（東京大）
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Amplification factor Displacement-controlled stress Frequency ratio Input energy Load-controlled stress Ratchet deformation Vibration
笹木 龍之介,一宮 正和,呂 金其,笠原 直人,（東京大）
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公開日:
キーワードタグ:
Amplification factor Displacement-controlled stress Frequency ratio Input energy Load-controlled stress Ratchet deformation Vibration
According to experimental observations, the failure modes of piping in nuclear power plants caused by large seismic motion are fatigue or ratchet deformation. However, the mechanism of ratchet deformation under the large seismic load is not so clear. In this study, authors conducted experiments and analysis of beams which simulates piping due to cyclic sinusoidal or more complicated waves (composite sinusoidal wave). As the results, authors confirmed that ratchet deformation occurrence conditions are strong...
英字タイトル:
Study on ratchet deformation occurrence conditions of beams due to vibration load
英字タイトル:
Study on ratchet deformation occurrence conditions of beams due to vibration load
第17回
設計想定を超える事象に対する構造強度分野からの新しいアプローチ
著者:
笠原 直人,出町 和之,佐藤 拓哉,一宮 正和,（東京大）,若井 隆純,山野 秀将,（JAEA）,中村 いずみ,（防災科研,現都市大）
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Beyond Design Basis Events Fracture Control Mitigation Resilience Safety
笠原 直人,出町 和之,佐藤 拓哉,一宮 正和,（東京大）,若井 隆純,山野 秀将,（JAEA）,中村 いずみ,（防災科研,現都市大）
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キーワードタグ:
Beyond Design Basis Events Fracture Control Mitigation Resilience Safety
The conventional purpose in the field of structural strength has been to prevent damage to design basis events (DBE). For beyond design basis events (BDBE), it is necessary to mitigate the impact on safety on the premise that damage will occur. The authors propose a mitigation method that suppresses the consequence into a fracture mode with a large impact by reducing the load due to a fracture with a small impact on safety. We will introduce the research results for individual component, extend the applicab...
英字タイトル:
New approach to beyond design basis events in structural strength field
英字タイトル:
New approach to beyond design basis events in structural strength field