学科分类
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4 个结果
  • 简介:动词bore有两种形式的形容词,即bored和boring。bored和boring的区别是:bored修饰的主语是人,boring修饰的主语是物。

  • 标签: 形容词 主语 修饰 动词
  • 简介:Applyingstiffnessmigrationmethod,a3Dfiniteelementmechanicalmodelisestablishedtosimulatetheexcavationandadvanceprocesses.Byusing3Dnonlinearfiniteelementmethod,thetunnelboringmachine(TBM)excavationprocessisdynamicallysimulatedtoanalyzethestressandstrainfieldstatusofsurroundingrockandsegment.Themaximumtensilestressofsegmentringcausedbytunnelconstructionmainlyliesinarchbottomandpresentszonaldistribution.Thestressincreasesslightlyandlimitedlyinthecourseofexcavation.Themaximumandminimumdisplacementsofsegment,manifestingaszonaldistribution,distributeinarchbottomandvaultrespectively.ThedisplacementsslightlyincreasewiththeadvanceofTBMandgraduallytendtostability.

  • 标签: 三维有限元模拟 隧道掘进机 输水隧洞 施工工艺 三维非线性有限元法 应力应变场