最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
Ag/La2NiO4基電觸頭在直流大電流條件下電弧侵蝕的實(shí)驗(yàn)與有限元研究
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家“863”基金資助項(xiàng)日(2001A A320175)及云南省自然科學(xué)重點(diǎn)基金(1999E0007Z)


Finite Element Method and Experimental Investigation on the Arc Erosion of Ag/La2NiO4 Base Electrical Contacts at High Direct Current
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    在電接觸試驗(yàn)機(jī)上測(cè)量Ag/La2NiO4基電觸頭，得到在直流18 V、30 A的工作條件下的相關(guān)實(shí)驗(yàn)數(shù)據(jù)。并進(jìn)一步分析電觸頭對(duì)的陰極和陽(yáng)極的表面形貌、電弧侵蝕和質(zhì)量變化特點(diǎn)。在此基礎(chǔ)上，通過(guò)對(duì)實(shí)驗(yàn)中閉合電弧→接觸電阻焦耳熱→分?jǐn)嚯娀　匀焕鋮s過(guò)程的分析，建立一個(gè)電觸頭使用過(guò)程中的瞬態(tài)溫度場(chǎng)的計(jì)算模型；根據(jù)測(cè)得的相關(guān)實(shí)驗(yàn)數(shù)據(jù)，采用有限元方法對(duì)該模型進(jìn)行計(jì)算，得到電觸頭的瞬態(tài)溫度場(chǎng)的分布和演化特點(diǎn)。通過(guò)計(jì)算結(jié)果可以較好預(yù)測(cè)電弧侵蝕的特點(diǎn)以及材料轉(zhuǎn)移方向，并給出關(guān)于材料熔化、汽化等方面的許多重要信息。這些結(jié)果對(duì)于該電觸頭材料的侵蝕和使用壽命的研究具有一定參考價(jià)值。

    Abstract:

    Experimental data of Ag/La2NiO4 base electrical contacts in the condition of DC 18V/30A were obtained by electrical contact experimental instrument. The morphology of anode and cathode surface, arc erosion and weight change were analysis. A transient temperature field model of electrical contacts was established by the following procedure analysis: the close arc→ the contact resistance Joule heat → the open arc. The features and distribution of the transient temperature field were calculated by finite element method according to the experimental data. From the results, not only the feature of arc erosion and direction of mass change were predicted, but also the important information about material melting and vaporization were understood, which are valuable to research the erosion mechanism and lifetime for the Ag/La2NiO4 base electrical contacts material.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

陳 松,管偉明,張昆華,郭迎春,耿永紅,郭俊梅,鄧德國(guó). Ag/La2NiO4基電觸頭在直流大電流條件下電弧侵蝕的實(shí)驗(yàn)與有限元研究[J].稀有金屬材料與工程,2009,38(1):131~137.[Chen Song, Guan Weiming, Zhang Kunhua, Guo Yingchun, Geng Yonghong, Guo Junmei, Deng Deguo. Finite Element Method and Experimental Investigation on the Arc Erosion of Ag/La2NiO4 Base Electrical Contacts at High Direct Current[J]. Rare Metal Materials and Engineering,2009,38(1):131~137.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2008-01-21
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: