亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

土壤切削大變形的三維數(shù)值仿真
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:


Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統(tǒng)計
  • |
  • 參考文獻
  • |
  • 相似文獻
  • |
  • 引證文獻
  • |
  • 資源附件
  • |
  • 文章評論
    摘要:

    對近年來有關土壤切削仿真的研究進行總結,并介紹自適應網格劃分、ALE以及SPH等3種解決大變形的方法;在此基礎上,針對一個簡化的切削模型,對3種方法進行土壤切削仿真的結果進行分析和比較;最后著重以某室內模型盾構刀盤刀具和上海地區(qū)軟粘土,利用ALE方法進行盾構刀盤刀具的大規(guī)模三維切削仿真分析。仿真計算基于LS-DYNA970 MPP 軟件和“曙光4000A”超級計算機,結果表明,3種不同的方法在解決土壤切削大變形時各有特點,其中ALE方法在更為細致的軟粘土盾構三維開挖仿真中得到的結果與試驗數(shù)據(jù)較為一致。

    Abstract:

    A review of the research on soil cutting in recent years was given, and three different methods for dealing with large deformation in soil cutting including adaptive meshing method, arbitrary Lagrangian-Eulerian(ALE) method, and smoothed particle hydrodynamics(SPH) method were introduced. Based on these three methods, a simplified 3-D finite elements model was then constructed for simulation of soil cutting by the shield cutter. After that, with an emphasis laid on the ALE method, a full 3-D finite element model has been constructed for simulation of soil cutting by the shield cutter head and cutter. Final calculation was accomplished by using LS-DYNA 970 MPP software on the DAWNING 4000A supercomputer. Calculation results showed different characteristics of these three methods when dealing with the large deformation in soil cutting through corresponding analysis and comparison. Meanwhile, it is also found that some simulation results such as moment in soil cutting by the shield cutter head and cutter were in good accordance to the experimental data.

    參考文獻
    相似文獻
    引證文獻
引用本文

丁峻宏,金先龍,郭毅之,湯華,楊洪杰.土壤切削大變形的三維數(shù)值仿真[J].農業(yè)機械學報,2007,38(4):118-121.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(4):118-121.

復制
分享
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期:
文章二維碼