English  |  正體中文  |  简体中文  |  Items with full text/Total items : 74010/74010 (100%)
Visitors : 24088022      Online Users : 495
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/68986

    Title: 反應爐壓力槽管嘴在暫態負荷下之熱應力與疲勞行為研究
    Authors: 陳宗志;Chen,Tsung-chih
    Contributors: 機械工程學系
    Keywords: 暫態負載;累計使用因子;格林函數;熱應力;Transient Loads;Cumulative Usage Factor;Green Function;Thermal Stress
    Date: 2015-07-28
    Issue Date: 2015-09-23 14:51:43 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 核能電廠中的核能一級組件在運轉期間,會受到來自壓力及溫度等各項循環暫態負載,且循環負載的大小及發生次數會影響組件的疲勞使用壽命,組件的疲勞使用壽命一直是設計者關注的議題。雖然在設計組件時已考慮到疲勞使用壽命,但安裝完成且開始運轉後,實際上所受到的循環負荷大小和設計值並不相同。
    本研究以核電廠的反應爐水淨化取水管線(Reactor Water Clean Up Outlet Nozzle, RWCU)作為分析對象,考慮不同設計負荷條件組合,採用有限元素分析軟體(ANSYS)進行分析,搭配ASME NB-3200的規範求取組件易損耗處的應力值,並計算出累積使用因子,結果顯示這些易損耗處在此設計負荷下之累積使用因子小於1,皆屬於安全範圍之內。
    ;The class 1 nuclear components are subjected to transient load like pressure and temperature during operation. The cycle number and magnitude of service load may affect the fatigue life of components and that is an important issue to engineering applications. Although the fatigue life of nuclear components had been evaluated in the design stage, the actual transient loads that components subjected to are not the same as the design transient loads.
    In this study, the Reactor Water Clean Up (RWCU) outlet nozzle of reactor pressure vessel is evaluated. The critical stress value of this component is calculated under combination of different design load conditions by finite element method. Then according to ASME NB-3200 specification, the cumulative usage factor is calculated. The result shows that the maximum cumulative usage factor of the evaluated critical locations are much less than permissible value, 1. In addition, this study also investigates the practicality of Green’s function in thermal stress calculation. The result shows that when material properties are constant, the thermal stress history is in good agreement with that of the finite element method.
    Appears in Collections:[機械工程研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明